KR101700776B1 - Ink-jet apparatus - Google Patents

Ink-jet apparatus Download PDF

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Publication number
KR101700776B1
KR101700776B1 KR1020150073247A KR20150073247A KR101700776B1 KR 101700776 B1 KR101700776 B1 KR 101700776B1 KR 1020150073247 A KR1020150073247 A KR 1020150073247A KR 20150073247 A KR20150073247 A KR 20150073247A KR 101700776 B1 KR101700776 B1 KR 101700776B1
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KR
South Korea
Prior art keywords
ink
connection line
chamber
nozzle
control valve
Prior art date
Application number
KR1020150073247A
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Korean (ko)
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KR20160138845A (en
Inventor
서태원
김수연
Original Assignee
주식회사 선익시스템
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Priority to KR1020150073247A priority Critical patent/KR101700776B1/en
Publication of KR20160138845A publication Critical patent/KR20160138845A/en
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Publication of KR101700776B1 publication Critical patent/KR101700776B1/en

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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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1721—Collecting waste ink; Collectors therefor
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17563—Ink filters
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves

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  • Coating Apparatus (AREA)

Abstract

According to an aspect of the present invention, there is provided an ink-jet apparatus for ejecting ink onto a substrate, comprising: an ink storage chamber in which the ink is stored; A nozzle connected to the ink reservoir by a first connection line, the nozzle receiving the ink from the ink reservoir and ejecting the ink onto the substrate; A first control valve for opening / closing the first connection line; A cleaning liquid chamber connected to the nozzle by a second connection line branched at the first connection line and storing a cleaning liquid; And a second control valve for opening and closing the second connection line.

Figure R1020150073247

Description

[0001] INK-JET APPARATUS [0002]

The present invention relates to an ink jet apparatus. More particularly, the present invention relates to an ink jet apparatus capable of simplifying a nozzle cleaning process and shortening a process tact time by providing and controlling a separate cleaning liquid chamber for supplying a cleaning liquid for cleaning an ink jet nozzle.

2. Description of the Related Art Flat panel displays such as a liquid crystal display (LCD), a plasma display panel (PDP) and an organic light emitting diode (OLED) are widely used as display devices have.

In order to form pixels of the flat panel display device, a method of forming an organic layer by ejecting an ink containing an organic material toward a substrate and printing the surface of the substrate is proposed.

On the other hand, when such an inkjet apparatus is used for a long period of time, the nozzles for ejecting ink and the inside of the nozzles may be contaminated due to cohesion and adhesion of ink. Such contaminants cause clogging of the nozzles, shortening the life of the nozzles, and causing side effects such as poor ink ejection. Accordingly, in order to remove contaminants from the inside of the nozzle, conventionally, an operator removes the contamination of the nozzle by replacing the ink in the ink chamber with the cleaning liquid, supplying the cleaning liquid to the nozzle through the tube, purging the liquid, . However, in this method, since the supply of the ink for printing and the supply of the cleaning liquid for cleaning the nozzle have to be performed by the same ink chamber, the replacing operation of the ink and the cleaning liquid is not only inconvenient, but also the replacement time is long and the process tact-time is increased There was a problem.

Korean Registered Patent No. 10-1348582 (Registered on December 31, 2013)

The present invention relates to an ink jet apparatus capable of simplifying a nozzle cleaning process and shortening a process tact time by providing and controlling a separate cleaning liquid chamber for supplying a cleaning liquid for cleaning an inkjet nozzle.

According to an aspect of the present invention, there is provided an ink-jet apparatus for ejecting ink onto a substrate, comprising: an ink storage chamber in which the ink is stored; A nozzle connected to the ink reservoir by a first connection line, the nozzle receiving the ink from the ink reservoir and ejecting the ink onto the substrate; A first control valve for opening / closing the first connection line; A cleaning liquid chamber connected to the nozzle by a second connection line branched at the first connection line and storing a cleaning liquid; And a second control valve for opening and closing the second connection line.

The second connection line may be branched at the first connection line between the first control valve and the nozzle.

The second control valve may be a three-way valve in which the second connection line is coupled to a branch point where the second connection line branches from the first connection line.

And a first filter provided on the first connection line and for filtering the ink supplied to the nozzle.

An ink recovery chamber connected to the ink storage chamber by a third connection line branching from the first connection line, for recovering and storing the ink in the ink storage chamber; And a third control valve for opening / closing the third connection line.

An ink supply chamber connected to the ink reservoir chamber by a fourth connection line and supplying ink to the ink reservoir chamber; And a fourth control valve for opening and closing the fourth connection line.

And a second filter provided on the fourth connection line for filtering the ink supplied to the ink storage chamber.

According to the embodiment of the present invention, a separate cleaning liquid chamber for supplying the cleaning liquid for cleaning the inkjet nozzle is provided and controlled, thereby simplifying the nozzle cleaning process and shortening the process tact time.

1 is a schematic diagram of an inkjet apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an inkjet apparatus according to the present invention will be described in detail with reference to the attached drawings. Referring to the accompanying drawings, the same or corresponding elements are denoted by the same reference numerals, It will be omitted.

1 is a schematic diagram of an inkjet apparatus according to an embodiment of the present invention.

1 shows a substrate 1, a stage 3, a nozzle 5, an ink reservoir chamber 10, a first connection line 12, a second connection line 14, a cleaning liquid chamber 16, A second control valve 18, a first filter 20, a second pump 22, a third connection line 24, an ink recovery chamber 26, a third control valve 28, The first pump 30, the fourth connection line 32, the ink supply chamber 34, the fourth control valve 36, the second filter 38, and the third pump 40 are shown.

The inkjet apparatus according to the present embodiment is an inkjet apparatus for ejecting ink onto a substrate 1, the inkjet apparatus comprising: an ink storage chamber 10 in which ink is stored; A nozzle 5 connected to the ink reservoir chamber 10 by a first connection line 12 and supplied with ink from the ink reservoir chamber 10 to eject ink onto the substrate 1; A first control valve (17) for opening and closing the first connection line (12); A cleaning liquid chamber (16) connected to the nozzle (5) by a second connection line (14) branched at the first connection line (12) and storing the cleaning liquid; The cleaning liquid filling process for cleaning the nozzle 5 can be automatically performed by including the second control valve 18 for opening and closing the second connection line 14. [

The substrate 1 is placed on the stage 3 and can be located inside a process chamber (not shown).

The ink storage chamber 10 stores the ink and supplies the ink to the nozzle 5 to be described later. The ink supplied from the ink storage chamber 10 is discharged toward the substrate 1 through the nozzle 5. A first pump 30 may be connected to the ink reservoir chamber 10. The first pump 30 supplies ink to the nozzles 5 by applying pressure to the ink reservoir chamber 10.

The nozzle 5 is connected to the ink reservoir chamber 10 by a first connection line 12 and receives ink from the ink reservoir chamber 10 to eject ink onto the substrate 1. [ The nozzles 5 can be positioned to face the substrate 1 and eject ink toward the substrate 1. [ The ink ejected through the nozzles 5 is printed on the substrate 1. [ A voltage applying unit (not shown) is electrically connected to the nozzle 5 and a voltage may be applied to the nozzle 5 through a voltage applying unit (not shown). The voltage applied to the nozzle 5 forms a potential difference between the nozzle 5 and the substrate 1 so that the ink ejected from the nozzle 5 is injected into the substrate 1 with a straight line. Further, the stage 3 on which the substrate 1 is placed may be grounded or a voltage opposite to the voltage applied to the nozzle 5 may be applied.

The first connection line 12 has one end connected to the ink reservoir chamber 10 and the other end connected to the nozzle 5 so that ink is supplied from the ink reservoir chamber 10 through the nozzle 5 ). The first connection line 12 may be a tube having a constant inner diameter.

The first control valve 17 opens and closes the first connection line 12. Specifically, the first control valve 17 is provided on the first connection line 12 to control the flow of ink supplied to the nozzle 5 through the first connection line 12 in accordance with opening and closing. When ink is to be supplied to the nozzle 5 for printing of the substrate 1, the first control valve 17 is opened and the cleaning liquid from the cleaning liquid chamber 16, which will be described later for cleaning the nozzle 5, The first control valve 17 is closed to prevent the rinsing liquid from flowing into the ink reservoir chamber 10 through the first connection line 12. [

The rinse solution chamber 16 is connected to the nozzle 5 by a second connection line 14 which branches off from the first connection line 12 and stores the rinse solution. The cleaning liquid is introduced into the nozzle 5 and the introduced cleaning liquid can be purged inside the nozzle 5 to clean the nozzle 5. [

The second connection line 14 may be branched at the first connection line 12 at one end and connected to the cleaning liquid chamber 16 at the other end. The second connection line 14 may be branched at the first connection line 12 between the first control valve 17 and the nozzle 5. The cleaning liquid is supplied from the cleaning liquid chamber 16 to the nozzle 5 through the second connection line 14 connected to the cleaning liquid chamber 16. The cleaning liquid flowing into the nozzle 5 is purged and discharged to the outside to clean the nozzle 5. The second connection line 14 may be a tube having a constant inner diameter.

A second pump (22) may be connected to the cleaning liquid chamber (16). The second pump 22 supplies the cleaning liquid to the nozzle 5 by applying pressure to the cleaning liquid chamber 16 and purge the cleaning liquid. In the present embodiment, the method in which the second pump 22 applies pressure to the cleaning liquid chamber 16 to supply the cleaning liquid to the nozzle 5 has been described. However, the supply of the cleaning liquid may be performed by various other methods.

The second control valve 18 opens and closes the second connection line 14. Specifically, the second control valve 18 is installed on the second connection line 14 to control the flow of the cleaning liquid supplied to the nozzle 5 through the second connection line 14 in accordance with opening and closing. When the cleaning liquid is supplied to the nozzle 5 for cleaning, the second control valve 18 is opened, and when ink is supplied from the ink reservoir chamber 10 to the nozzle 5 for ink printing after the cleaning of the nozzle 5 The second control valve 18 is closed.

The second control valve 18 may be a three-way valve in which the second connection line 14 is coupled to a branch point where it branches from the first connection line. The three-way valve is a valve having a hole in three directions. In the ink printing, the hole connected to the second connection line 14 is closed so that ink is supplied to the nozzle 5 from the ink reservoir chamber 10, The cleaning liquid can be supplied to the nozzle 5 from the cleaning liquid chamber 16 by closing the hole in the direction toward the ink reservoir chamber 10 by being connected to the first connection line 12 during the cleaning operation.

As described above, the inkjet apparatus according to the present embodiment controls the opening and closing of each connection line by using the first control valve 17 and the second control valve 18 with the separate cleaning liquid chamber 16, 5) can be simplified and the process tact-time can be shortened. On the other hand, a first filter 20 may be provided on the first connection line 12, and the first filter 20 filters the ink supplied to the nozzle 5. [ The first filter 20 is installed in the first connection line 12 to remove foreign substances and bubbles in the ink to improve the quality of the ink discharged through the nozzle 5. [

Meanwhile, the inkjet apparatus according to the present embodiment may include an ink recovery chamber 26 for recovering and storing ink, and the ink recovery chamber 26 may include a third connection line 24 branched from the first connection line 12, May be connected to the ink reservoir chamber 10 by the ink supply port 24. The third connection line 24 may be branched at one end to the first connection line 12 and at the other end to the ink recovery chamber 26 so that the ink stored in the ink reservoir chamber 10 is returned to the ink recovery chamber 26 Supply. The third connection line 24 may be a tube having a constant inner diameter.

The third control valve 28 opens and closes the third connection line 24. Specifically, the third control valve 28 is disposed on the third connection line 24 to control the ink flowing along the third connection line 24 in accordance with opening and closing. When the ink stored in the ink reservoir chamber 10 is recovered to the ink recovery chamber 26, the first control valve 17 is closed and the third control valve 28 is opened so that the ink stored in the ink reservoir chamber 10 And is supplied to the ink recovery chamber 26. The first pump 30 can supply ink to the third connection line 24 by applying pressure to the ink reservoir chamber 10. [

On the other hand, the ink-jet apparatus according to the present embodiment includes an ink supply chamber 34 connected to the ink reservoir chamber 10 by a fourth connection line 32 and supplying ink to the ink reservoir chamber 10; And a fourth control valve 36 for opening and closing the fourth connection line 32. The fourth connection line 32 has one end connected to the ink reservoir chamber 10 and the other end connected to the ink supply chamber 34. The ink is supplied from the ink supply chamber 34 through the fourth connection line 32, And is supplied to the storage chamber 10. The fourth connection line 32 may be a tube having a constant inner diameter.

The fourth control valve 36 opens and closes the fourth connection line 32. Specifically, the fourth control valve 36 is installed on the fourth connection line 32 to control the flow of ink supplied to the ink reservoir chamber 10 through the fourth connection line 32 in accordance with opening and closing. The fourth control valve 36 is opened when supply of ink to the ink reservoir chamber 10 is required and the fourth control valve 36 is closed when supply of ink to the ink reservoir chamber 10 is not required.

The inkjet apparatus according to the present embodiment can automatically perform the ink filling process of the ink reservoir chamber 10 after the contamination of the nozzle 5 is removed by disposing a separate ink supply chamber 34. [

A third pump 40 may be connected to the ink supply chamber 34. The third pump 40 supplies ink to the ink reservoir chamber 10 by applying pressure to the ink supply chamber 34. In this embodiment, the third pump 40 applies the pressure to the ink supply chamber 34 to supply the ink to the ink reservoir chamber 10, but the ink supply may be performed by various other methods.

A second filter 38 may be provided on the fourth connection line 32 and the second filter 38 filters the ink supplied to the ink reservoir chamber 10. The second filter 38 is installed in the fourth connection line 32 to remove foreign substances and bubbles in the ink to improve the quality of the ink supplied.

Hereinafter, the operation of each constitution will be described in the ink filling process of the ink storage chamber 10, the process of discharging ink for printing the substrate 1, and the process of cleaning the nozzle 5. [

The fourth control valve 36 provided in the fourth connection line 32 is opened and the third pump 40 is operated so that the ink is supplied from the ink supply chamber 34 to the fourth connection line 32. [ The ink is supplied to the ink reservoir chamber 10 through the ink supply port. The ink filling process may be performed simultaneously with the ink discharging process to be described later, and may be performed in a process separate from the ink discharging process.

The third control valve 28 provided on the third connection line 24 is closed to prevent the ink supplied to the nozzle 5 from being supplied to the ink recovery chamber 26. [ Next, the first control valve 17 provided in the first connection line 12 is opened and the first pump 30 is operated so that the ink in the ink reservoir chamber 10 flows through the first connection line 12 into the nozzle 5). At this time, the second control valve 18 may be closed to prevent the ink flowing through the first connection line 12 from flowing into the rinse solution chamber 16. The ink supplied to the nozzles 5 is discharged to the substrate 1 through the nozzles 5 (not shown).

Referring to the nozzle 5 cleaning process, the first control valve 17 provided in the first connection line 12 is closed to prevent the cleaning liquid from flowing into the ink reservoir chamber 10. The second control valve 18 provided in the second connection line 14 is opened and the second pump 22 is operated so that the cleaning liquid in the cleaning liquid chamber 16 flows through the second connection line 14 to the nozzle 5 ). The cleaning liquid supplied to the nozzle 5 is purged and discharged to the outside to clean the nozzle 5. When the ink stored in the ink reservoir chamber 10 is to be recovered to the ink recovery chamber 26 in the nozzle 5 cleaning process, the third control valve 28 provided in the third connection line 24 is opened, The pump 30 is operated to supply ink in the ink reservoir chamber 10 to the ink recovery chamber 26 to be recovered.

The inkjet apparatus described above has a separate cleaning liquid chamber for supplying a cleaning liquid for cleaning the nozzle, and by controlling the same, the nozzle cleaning process can be simplified and the process tact-time can be shortened.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. And changes may be made without departing from the spirit and scope of the invention.

1: substrate 3: stage
5: Nozzle 10: Ink storage chamber
12: first connection line 14: second connection line
16: rinsing liquid chamber 17: first control valve
18: second control valve 20: first filter
22: second pump 24: third connection line
26: ink recovery chamber 28: third control valve
30: first pump 32: fourth connection line
34: ink supply chamber 36: fourth control valve
38: second filter 40: third pump

Claims (7)

An ink jet apparatus for ejecting an ink containing an organic substance to a substrate to form a pixel of an OLED flat panel display element,
An ink storage chamber in which the ink is stored;
A nozzle connected to the ink reservoir by a first connection line, the nozzle receiving the ink from the ink reservoir and ejecting the ink onto the substrate;
A first control valve for opening / closing the first connection line;
A cleaning liquid chamber connected to the nozzle by a second connection line branched at the first connection line and storing a cleaning liquid;
A second control valve for opening / closing the second connection line;
An ink recovery chamber connected to the ink storage chamber by a third connection line branching from the first connection line, for collecting and storing the ink in the ink storage chamber;
And a third control valve for opening / closing the third connection line,
And the ink is supplied to the ink reservoir chamber through the ink reservoir chamber in accordance with opening and closing of the first control valve, the second control valve and the third control valve, So that the ink in the ink recovery chamber returns to the ink storage chamber after cleaning the ink storage chamber. The method according to claim 1,
And the second connection line is branched at the first connection line between the first control valve and the nozzle. The method according to claim 1,
And the second control valve is a three-way valve in which the second connection line is coupled to a branch point where the second connection line branches from the first connection line. The method according to claim 1,
Further comprising a first filter provided on the first connection line and for filtering the ink supplied to the nozzle. delete The method according to claim 1,
An ink supply chamber connected to the ink reservoir chamber by a fourth connection line and supplying ink to the ink reservoir chamber;
And a fourth control valve for opening / closing the fourth connection line. The method according to claim 6,
Further comprising a second filter provided on the fourth connection line and for filtering the ink supplied to the ink reservoir chamber.
KR1020150073247A 2015-05-26 2015-05-26 Ink-jet apparatus KR101700776B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200038348A (en) * 2018-10-02 2020-04-13 삼성디스플레이 주식회사 Inkjet printing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006015637A (en) 2004-07-02 2006-01-19 Fuji Photo Film Co Ltd Inkjet recording apparatus
JP4645172B2 (en) 2004-11-26 2011-03-09 コニカミノルタホールディングス株式会社 Ink jet recording apparatus and recording head cleaning method
JP5332118B2 (en) 2007-03-08 2013-11-06 凸版印刷株式会社 Ink ejection printing apparatus and cleaning method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101348582B1 (en) 2007-06-27 2014-01-08 에스엔유 프리시젼 주식회사 Ｏｌｅｄ manufacturing apparatus having an ink-jet unit and ｏｌｅｄ manufacturing method using the same
KR101293772B1 (en) * 2011-07-22 2013-08-06 이지마크(주) Ink supplying apparatus for ink jet printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006015637A (en) 2004-07-02 2006-01-19 Fuji Photo Film Co Ltd Inkjet recording apparatus
JP4645172B2 (en) 2004-11-26 2011-03-09 コニカミノルタホールディングス株式会社 Ink jet recording apparatus and recording head cleaning method
JP5332118B2 (en) 2007-03-08 2013-11-06 凸版印刷株式会社 Ink ejection printing apparatus and cleaning method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200038348A (en) * 2018-10-02 2020-04-13 삼성디스플레이 주식회사 Inkjet printing apparatus
KR102631453B1 (en) * 2018-10-02 2024-01-31 삼성디스플레이 주식회사 Inkjet printing apparatus

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