CN110039903A - A kind of high resolution printed new method based on satellite droplet - Google Patents
A kind of high resolution printed new method based on satellite droplet Download PDFInfo
- Publication number
- CN110039903A CN110039903A CN201810065928.6A CN201810065928A CN110039903A CN 110039903 A CN110039903 A CN 110039903A CN 201810065928 A CN201810065928 A CN 201810065928A CN 110039903 A CN110039903 A CN 110039903A
- Authority
- CN
- China
- Prior art keywords
- spray orifice
- liquid bridge
- ink
- satellite droplet
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on 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
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
Abstract
A kind of novel high resolution printed new method in inkjet printing field.The phenomenon that this method will form satellite droplet using liquid bridge fracture, is had developed and is carried out high resolution printed new method using satellite droplet.Two spray orifice middle lines are aligned, and staggered relatively at a certain distance；The ink in two liquid storage chambers is squeezed out simultaneously from spray orifice by two minute-pressure transistors, two drops not separated with spray orifice is made to meet and merge to form liquid bridge in middle position.The ink in liquid bridge is sucked by liquid storage chamber by the opposite direction deformation of piezo-electric crystal again later, is broken liquid bridge, satellite droplet needed for forming printing；On the printing face satellite droplet blown off by appropriately sized air-flow again, complete printing.The size of satellite droplet can be by the geometric dimension of liquid bridge, and the physical property of ink is inhaled into spray orifice in liquid bridge speed and ink is adjusted.In addition to double spray orifice operating modes described above, this method can also use single spraying hole operating mode.
Description
Technical field
The high resolution printed new method based on satellite droplet that the present invention relates to a kind of belongs to inkjet printing technology neck
Domain specifically breaks to form the satellite droplet that size is much smaller than spray orifice size using liquid bridge, recycles appropriately sized air-flow will
Satellite droplet is blown off on printing face, and printing is completed.This method is staggered relatively by the identical spray orifice of two sizes, micro- by two
Piezo-electric crystal simultaneously squeezes out the ink in two liquid storage chambers, and two drops not separated with spray orifice is made to meet in middle position
And it merges and forms liquid bridge；The ink in liquid bridge is sucked by spray orifice again by liquid storage by the opposite direction deformation of piezo-electric crystal later
Chamber is broken liquid bridge, satellite droplet needed for forming printing；It is held again by appropriately sized air-flow by what the satellite droplet was blown off
On print face, printing is completed.The formation of liquid bridge and Break frequency are identical as the vibration frequency of piezo-electric crystal.Pass through the height of piezo-electric crystal
Frequency vibration is, it can be achieved that high-frequency is high resolution printed.
Technical background
Traditional inkjet printing can be divided mainly into piezoelectric ink jet printing technique and heat foamable ink-jet in the way of drop formation
Printing technique.
In piezoelectric type spray head, voltage pulse is acted on the piezo-electric crystal in spray head, and piezo-electric crystal deformation is to make to spray
Liquid storage box volume in head changes, and the change of volume causes the moment that pressure or speed occur in spray head internal liquid to become
Change, these change so that spray head liquid storage intracavity liquid is sprayed from spray orifice in droplets.
Using a thin film resistor as heating element in thermal bubble type spray head.When an electric pulse is applied to spray head, electricity
Stream, which flows through this resistor generation heat, makes the liquid evaporation being in contact with it, and bubble is formed outside resistance.Bubble is expanded in spray orifice
And spray liquid from spray orifice in droplets.
The printing of printing technique traditional at present, either piezoelectric ink jet or heat foamable inkjet printing, all encounter printing
The bottleneck problem of resolution ratio.It is limited to the mode of its drop generation, higher print resolution, which is meant that, needs use smaller
Spray orifice.And smaller spray orifice can dramatically increase the manufacturing cost and difficulty of spray head, and propose more to use and maintenance
High requirement.Higher requirements are also raised to ink for smaller spray orifice.Solid particle polluter in ink easily causes spray orifice
Blocking.Comprehensively consider its economy and practicability, it is big that current piezoelectric printhead or heat foamable print head generally use diameter
In 20 microns of spray orifice, the droplet size printed is generally in the magnitude of picoliters.Lower print resolution limits ink-jet and beats
Application of the print technology in many frontiers.
For traditional inkjet printing, satellite droplet will be avoided strongly.Because since satellite droplet is much smaller than main liquid
Drop, if flight path cannot be controlled effectively, will result in winged Mo Xianxiang, influences print quality.Flying ink phenomenon is to pass
The problem that the inkjet printing technology of system frequently encounters.
Summary of the invention
The present invention is directed to existing inkjet printing technology above shortcomings and problem, provides a kind of " based on satellite liquid
The high resolution printed new method of drop " is broken generated satellite droplet using liquid bridge and carries out high-resolution printing.The present invention
Spray orifice identical with traditional inkjet printing size can be used, the remote high pattern with conventional ink-jet printing of resolution ratio is printed.
The extremely unpopular satellite droplet in traditional inkjet printing technology, has obtained appropriate use in this printing technique, from
And the volume of the ink droplet printed is made to have decreased to magnitude of ascending to heaven by picoliters magnitude.
The beneficial effects of the present invention are: it can use the spray orifice being relatively large in diameter and generate size defending much smaller than injection diameter
Star drop, so that print resolution greatly improves；The present invention using the very small minute-pressure transistor of volume to the formation of liquid bridge with
Fracture is controlled, and convenient for making the industrialization spray head for possessing array spray orifice, realizes the printing of high-efficiency and high-resolution rate；Simultaneously because this
Invention can generate the drop for being much smaller than spray orifice size using big spray orifice, so can print to the more adaptable of ink
Ink with viscosity higher and surface tension.
Detailed description of the invention
Fig. 1 is the printing equipment structural schematic diagram based on satellite droplet under double spray orifice operating modes.
Fig. 2 is the printing equipment structural schematic diagram based on satellite droplet under the operating mode of single spraying hole.
Fig. 3 is that liquid bridge forms schematic diagram between two spray orifices under double spray orifice operating modes.
Fig. 4 is that liquid bridge is broken under double spray orifice operating modes, and satellite droplet is formed and the flight schematic diagram under airflow function.
Fig. 5 is that liquid bridge forms schematic diagram between spray orifice and object under the operating mode of single spraying hole.
Fig. 6 is that liquid bridge is broken under the operating mode of single spraying hole, and satellite droplet is formed and the flight schematic diagram under airflow function.
Specific embodiment
The present invention is achieved by the following technical solutions.The present invention is staggered relatively by two spray orifices of the same size, and
The ink in liquid storage chamber is squeezed out in spray orifice by piezo-electric crystal；Change liquid storage cavity volume by the deformation of piezo-electric crystal, makes
Ink is obtained to squeeze out from spray orifice；By controlling the deflection and deformation velocity of piezoelectric ceramics, so that the extrusion output of ink is enough to be formed
Liquid bridge, but separate it with spray orifice；After forming liquid bridge, piezo-electric crystal reversal deformation, and the ink in liquid bridge is sucked and is led to
It crosses spray orifice sucking liquid storage chamber and forms satellite droplet so that liquid bridge is broken；The satellite droplet is blown by appropriately sized air-flow again
On the printing face fallen, printing is completed.
The generation of satellite droplet can also be realized by the method in single spraying hole, specific as follows: suitable apart from spray orifice
Distance places a size and the comparable cylindrical body of spray orifice, and the deformation of minute-pressure transistor squeezes out ink, the shape between spray orifice and cylindrical body
At liquid bridge；The ink in liquid bridge is sucked liquid storage chamber again by the opposite direction deformation of piezo-electric crystal later, is broken liquid bridge, is formed printing
Required satellite droplet.
Different traditional inkjet printing methods with spray orifice median perpendicular and printing face, during print job, the party
Spray orifice used in method is parallel to printing face.
Another dramatically different prints with conventional ink-jet is characterized in that this method compares the speed that ink squeezes out spray orifice
Small, the momentum for being extruded ink is not enough to that surface tension is overcome to disengage it from nozzle；The purpose that this method squeezes out ink is shape
At liquid bridge.
The phenomenon that will form satellite droplet this process employs liquid bridge fracture has developed high-precision using satellite droplet progress
Spend the new method of printing；The size of satellite droplet can be by the geometric dimension of liquid bridge, and ink is inhaled into spray orifice in liquid bridge
Speed and the physical property of ink are adjusted.
The spray orifice for being 20 microns for diameter, ink at most can be extruded and suck under tens of thousands of hertz of frequency
The generation frequency of spray orifice, frequency and satellite droplet that liquid bridge is formed and is broken also can achieve tens of thousands of hertz.If the liquid generated
Dripping diameter is 2 microns, and frequency is 10,000 hertz, prints the straight line of ink dot connection, and printing can reach on Rate Theory
To 2cm/s；For 5 microns of drop of diameter, 30,000 hertz of frequency, print speed then can achieve 15cm/s.
Since the invention uses micro- piezoelectric ceramic actuator of volume very little, it is highly convenient for a large amount of spray orifices being integrated into one
On spray head, thus the high-precision printing operation of competent large area.
Claims (7)
1. a kind of high resolution printed new method based on satellite droplet, it is characterised in that be broken generated satellite using liquid bridge
Drop carries out high resolution printed；The formation and fracture of liquid bridge can be using double spray orifices and two kinds of single spraying hole operating modes.
2. double spray orifice operating modes according to claim 1, characterized in that the identical orifice center line pair of two sizes
Together, opposite certain distance is placed；The distance is generally twice or so of injection diameter；It will be in two liquid storage chambers by piezo-electric crystal
Ink squeezed out simultaneously from spray orifice, so that the ink being extruded is met fusion in middle position, form liquid bridge between two spray orifices.
3. double spray orifice operating modes according to claim 1, characterized in that the extrusion output of ink is enough to spray it at two
Liquid bridge is formed between hole, but its extruded velocity is insufficient to allow it to separate with spray orifice again.
4. double spray orifice operating modes according to claim 1, characterized in that the fracture of liquid bridge is anti-due to piezo-electric crystal
To deformation, the ink in liquid bridge is made to be inhaled into spray orifice, the ink volume in liquid bridge is caused to be not enough to that liquid bridge is maintained to be stabilized institute
Caused by.
5. single spraying hole according to claim 1 operating mode, characterized in that placed in the place apart from spray orifice certain distance
One diameter and the sizable cylindrical body of injection diameter, the distance are generally twice or so of spray orifice size；Ink is by spray orifice
It squeezes out and forms liquid bridge between spray orifice and the object；Ink in liquid bridge is sucked liquid storage chamber, made by piezo-electric crystal reversal deformation
Liquid bridge volume becomes smaller and breaks to form satellite droplet.
6. single spraying hole according to claim 2 operating mode, characterized in that the extrusion output of ink be enough to make it in spray orifice and
Liquid bridge is formed between object, but its extruded velocity is insufficient to allow it to separate with spray orifice again.
7. the high resolution printed new method according to claim based on satellite droplet, characterized in that liquid bridge fracture is produced
Raw satellite droplet be and direction appropriate by speed perpendicular on airflow blow to the printing face in printing face to complete printing
's.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065928.6A CN110039903A (en) | 2018-01-16 | 2018-01-16 | A kind of high resolution printed new method based on satellite droplet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065928.6A CN110039903A (en) | 2018-01-16 | 2018-01-16 | A kind of high resolution printed new method based on satellite droplet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110039903A true CN110039903A (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810065928.6A Pending CN110039903A (en) | 2018-01-16 | 2018-01-16 | A kind of high resolution printed new method based on satellite droplet |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791599A (en) * | 2020-07-21 | 2020-10-20 | 广州威品技术研发有限公司 | Color digital printing machine |
| CN113318797A (en) * | 2021-05-17 | 2021-08-31 | 西安交通大学 | Microfluidic-based high-particle-fraction micro-droplet generation method |
| CN114312028A (en) * | 2021-12-22 | 2022-04-12 | Tcl华星光电技术有限公司 | Printhead inkjet system and inkjet printing apparatus |
| CN116283255A (en) * | 2022-11-01 | 2023-06-23 | 福建星海通信科技有限公司 | Direct-writing 3D printing method for low-solid-phase-content ceramic slurry |
| CN116444257B (en) * | 2022-11-01 | 2024-06-11 | 福建星海通信科技有限公司 | Precise direct-writing 3D printing method |
-
2018
- 2018-01-16 CN CN201810065928.6A patent/CN110039903A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791599A (en) * | 2020-07-21 | 2020-10-20 | 广州威品技术研发有限公司 | Color digital printing machine |
| CN113318797A (en) * | 2021-05-17 | 2021-08-31 | 西安交通大学 | Microfluidic-based high-particle-fraction micro-droplet generation method |
| CN113318797B (en) * | 2021-05-17 | 2022-05-06 | 西安交通大学 | Microfluidic-based high-particle-fraction micro-droplet generation method |
| CN114312028A (en) * | 2021-12-22 | 2022-04-12 | Tcl华星光电技术有限公司 | Printhead inkjet system and inkjet printing apparatus |
| CN116283255A (en) * | 2022-11-01 | 2023-06-23 | 福建星海通信科技有限公司 | Direct-writing 3D printing method for low-solid-phase-content ceramic slurry |
| CN116444257A (en) * | 2022-11-01 | 2023-07-18 | 福建星海通信科技有限公司 | Precise direct-writing 3D printing method |
| CN116283255B (en) * | 2022-11-01 | 2024-02-23 | 福建星海通信科技有限公司 | Direct-writing 3D printing method for low-solid-phase-content ceramic slurry |
| CN116444257B (en) * | 2022-11-01 | 2024-06-11 | 福建星海通信科技有限公司 | Precise direct-writing 3D printing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190723 |
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| WD01 | Invention patent application deemed withdrawn after publication |