WO2011155324A1 - Dispositif d'application de jet d'encre - Google Patents

Dispositif d'application de jet d'encre Download PDF

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Publication number
WO2011155324A1
WO2011155324A1 PCT/JP2011/061875 JP2011061875W WO2011155324A1 WO 2011155324 A1 WO2011155324 A1 WO 2011155324A1 JP 2011061875 W JP2011061875 W JP 2011061875W WO 2011155324 A1 WO2011155324 A1 WO 2011155324A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
nozzle
region
nozzle surface
inkjet
Prior art date
Application number
PCT/JP2011/061875
Other languages
English (en)
Japanese (ja)
Inventor
唯史 塩崎
千幸 神徳
健一 向井
Original Assignee
シャープ株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to CN2011800279014A priority Critical patent/CN102933315A/zh
Priority to JP2012519330A priority patent/JPWO2011155324A1/ja
Publication of WO2011155324A1 publication Critical patent/WO2011155324A1/fr

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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—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • 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—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16585—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles for paper-width or non-reciprocating print heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles

Definitions

  • the present invention generally relates to an ink jet coating apparatus, and more particularly to an ink jet coating apparatus including a cleaning mechanism for wiping the nozzle surface.
  • Japanese Patent Application Laid-Open No. 2006-248102 discloses an inkjet coating for the purpose of improving the wiping state of excess ejection liquid on the nozzle surface of an inkjet head and stabilizing the ejection of the solution.
  • An apparatus is disclosed (Patent Document 1).
  • the inkjet coating apparatus disclosed in Patent Document 1 includes a wiping cloth, a feeding mechanism that feeds the wiping cloth to the front surface of the nozzle surface of the inkjet head, and a roller that presses the wiping cloth against the nozzle surface.
  • the wiping cloth is formed of a band-shaped member having a low dust generation and water absorption, for example, a polyester fiber.
  • the nozzle surface is wiped off by the roller moving along the nozzle surface while pressing the wiping cloth against the nozzle surface.
  • Japanese Patent Application Laid-Open No. 2005-305845 discloses a liquid ejection head cleaning device for the purpose of improving the cleaning effect of the nozzle surface of the liquid ejection head (Patent Document 2).
  • the cleaning device disclosed in Patent Document 2 includes a cleaning roller in which a surface that contacts the nozzle surface is formed by a fibrous absorbent body and wipes the nozzle surface.
  • Patent Document 3 discloses a print cleaning mechanism aimed at improving ejection reliability (Patent Document 3).
  • the print cleaning mechanism disclosed in Patent Document 3 includes a cleaning roller made of an elastic porous material, and a cleaning paper made of a nonwoven fabric and disposed between a head portion that supplies ink when the ink is wiped off, and the cleaning roller.
  • An inkjet coating apparatus is used in a manufacturing process for forming a functional film such as a resist or an alignment film on the surface of a substrate.
  • a cleaning device for wiping off the ink adhering to the nozzle surface is used. Specifically, the ejection stability is realized by wiping the ink so that the nozzle surface is kept moist to some extent.
  • the amount of ink adhering to the nozzle surface varies depending on the location due to the positional relationship with the nozzle holes. In this case, if the ink is wiped off in the same manner as in other places even though the amount of ink adhering is small, the nozzle surface is dried in that place, and the ink residue is solidified. Furthermore, when the state of the nozzle surface deteriorates due to the solidified ink and the state progresses, there is a concern that the ink cannot be stably ejected.
  • an object of the present invention is to solve the above-mentioned problems and to provide an ink jet coating apparatus in which ink ejection is stabilized.
  • An ink jet coating apparatus includes an ink jet head having a nozzle surface, an absorber for wiping the nozzle surface, and a moving mechanism.
  • the ink jet head is formed with a plurality of nozzle holes that open on the nozzle surface and eject ink, and supply holes that supply ink toward the plurality of nozzle holes.
  • the absorber absorbs ink adhering to the nozzle surface.
  • the moving mechanism unit relatively moves the absorber and the inkjet head in a state where the absorber and the nozzle surface face each other.
  • the moving mechanism unit When the nozzle surface is viewed from the front, a first area where a plurality of nozzle holes are opened and a supply hole which is disposed adjacent to the first area and is formed inside the inkjet head are projected onto the nozzle surface.
  • the second region is defined.
  • the moving mechanism unit relatively moves the absorber and the inkjet head along the direction in which the first region and the second region are arranged.
  • the absorber wipes the first region with a large amount of ink adhering to the nozzle surface and the second region with a small amount of ink adhering to the nozzle surface in order, It is moved relative to the inkjet head.
  • the ink adhering to the first region is absorbed by the absorber, and the ink absorbed by the absorber moves to the second region. Accordingly, it is possible to prevent the second region from being extremely dried and the ink solid matter from being generated on the nozzle surface.
  • the present invention it is possible to stabilize the ejection of ink from the ink jet coating apparatus.
  • a plurality of inkjet heads are provided so that the first region and the second region are aligned in one direction.
  • the ink jet coating apparatus configured in this manner, the first region and the second region of the plurality of ink jet heads are sequentially wiped by the absorber. For this reason, it can prevent that the 2nd area
  • a plurality of inkjet heads are provided in a plurality of rows so that the first region of each inkjet head is arranged in a staggered manner along the direction in which the first region and the second region are arranged.
  • the first region and the second region of the plurality of ink jet heads in each row are sequentially wiped by the absorber. For this reason, it can prevent that the 2nd area
  • the absorber is formed by winding a belt-like member capable of absorbing ink in multiple layers.
  • the absorbent property of the absorber can be increased by the structure in which the belt-shaped member is wound in multiple layers.
  • the belt-like member is made of knitting. According to the ink jet coating apparatus configured as described above, the ink enters the stitches of the knitted fabric, so that the ink adhering to the nozzle surface can be absorbed by the absorber.
  • the polyimide solution is discharged toward the substrate through a plurality of nozzle holes.
  • the polyimide solution adhering to the nozzle surface is wiped off by the absorber.
  • the polyimide solution can be stably discharged toward the substrate.
  • the first area and the second area are arranged such that the second area is wiped continuously with the wiper of the first area by the absorber as the absorber and the inkjet head move relative to each other. ing.
  • the second region is wiped off by the absorber that has absorbed the ink from the first region, so that the second region can be prevented from being extremely dried.
  • FIG. 3 is a cross-sectional view showing an ink jet head taken along line III-III in FIG. 2.
  • FIG. 4 is a cross-sectional view showing the ink jet head taken along line IV-IV in FIG. 3.
  • FIG. 4 is a perspective view which shows the cleaning roller in FIG.
  • It is a bottom view which shows the wiping process of the nozzle surface by a cleaning roller.
  • It is sectional drawing which shows the mode of the nozzle surface before wiping off with a cleaning roller.
  • FIG. 3 shows the conveyance direction of a cleaning roller in the inkjet coating device for a comparison.
  • FIG. 9 is a cross-sectional view illustrating a nozzle surface wiping step in the inkjet coating apparatus for comparison in FIG. 8. It is sectional drawing which shows the mode of the nozzle surface after the wiping off process in FIG. 9 was implemented. It is sectional drawing which shows the mode of the nozzle surface after the wiping off process in FIG. 6 was implemented. It is a bottom view which shows the modification of the inkjet coating device shown in FIG.
  • FIG. 1 is a perspective view showing an ink jet coating apparatus according to an embodiment of the present invention.
  • the inkjet coating apparatus 10 in this Embodiment is used for the process of forming an alignment film on the surface of the liquid crystal substrate 16 in the manufacturing process of a liquid crystal display.
  • the inkjet coating apparatus 10 includes a mounting table 12, a transport arm 14, and an inkjet head 21.
  • a liquid crystal substrate 16 that is a target for ejecting ink is placed on the mounting table 12.
  • the liquid crystal substrate 16 has a main surface 16a on which an alignment film is formed.
  • the liquid crystal substrate 16 is mounted on the mounting table 12 so that the main surface 16a extends in the horizontal direction.
  • the liquid crystal substrate 16 has a rectangular shape when the main surface 16a is viewed from the front.
  • the liquid crystal substrate 16 is a large substrate having a size of 2160 ⁇ 2460 mm or 2850 ⁇ 3050 mm.
  • a polyimide solution is applied to the main surface 16a.
  • the material applied to the main surface 16a of the liquid crystal substrate 16 is not limited to polyimide, and a material that can be a raw material for the alignment film is appropriately selected.
  • the inkjet head 21 has a function of ejecting ink toward the liquid crystal substrate 16.
  • the inkjet head 21 is provided above the mounting table 12.
  • the inkjet head 21 has a nozzle surface 22.
  • the nozzle surface 22 extends in the horizontal direction.
  • the transport arm 14 is provided as a moving mechanism unit for the substrate for moving the liquid crystal substrate 16 mounted on the mounting table 12 and the inkjet head 21 relative to each other. More specifically, the transport arm 14 is connected to the mounting table 12 and is provided so as to be able to transport the mounting table 12 in the horizontal direction indicated by the arrow 101. As the transport arm 14 is driven, the liquid crystal substrate 16 mounted on the mounting table 12 passes under the inkjet head 21. During this time, a polyimide solution is discharged from the nozzle surface 22 toward the liquid crystal substrate 16, whereby a polyimide film is applied to the main surface 16a.
  • FIG. 2 is a bottom view showing the ink-jet head viewed from the direction indicated by arrow II in FIG.
  • FIG. 3 is a cross-sectional view showing the ink jet head taken along line III-III in FIG.
  • the inkjet head 21 is configured by combining a plurality of inkjet heads 21p.
  • the plurality of inkjet heads 21p are arranged in a direction (direction indicated by an arrow 102 in FIG. 2) orthogonal to the transport direction (direction indicated by the arrow 101 in FIG. 2) of the liquid crystal substrate 16.
  • the plurality of inkjet heads 21p are combined so that the nozzle surfaces 22 of the inkjet heads 21p extend on the same plane.
  • the total length of the inkjet head 21 in the direction orthogonal to the transport direction of the liquid crystal substrate 16 is set to be larger than the width of the liquid crystal substrate 16 in the same direction.
  • the inkjet heads 21p have the same structure.
  • the number of inkjet heads 21p to be combined is appropriately determined in consideration of the size of the liquid crystal substrate 16.
  • the inkjet head 21p includes a head main body 31 and a nozzle plate 32 as a block member, a flexible plate 38, a piezoelectric (piezoelectric) element 36, and a drive unit 34.
  • the head body 31 has an opening 35 penetrating from the upper surface to the lower surface. Inside the opening 35, a drive unit 34 and a plurality of piezo elements 36 are arranged. A flexible plate 38 is provided on the lower surface of the head body 31 so as to close the opening 35.
  • the nozzle plate 32 is attached to the lower surface of the head body 31 so as to cover the flexible plate 38.
  • the nozzle plate 32 has a nozzle surface 22.
  • the nozzle surface 22 has a rectangular shape having a short side in the transport direction of the liquid crystal substrate 16 and a long side in a direction orthogonal to the transport direction of the liquid crystal substrate 16.
  • a plurality of nozzle holes 24 are formed in the inkjet head 21p.
  • the nozzle hole 24 is a hole for ejecting ink toward the liquid crystal substrate 16.
  • the nozzle hole 24 is formed in the nozzle plate 32.
  • the nozzle hole 24 is formed so as to open in the nozzle surface 22.
  • the plurality of nozzle holes 24 are arranged at intervals from each other in a direction orthogonal to the transport direction of the liquid crystal substrate 16.
  • the plurality of nozzle holes 24 are arranged in a staggered manner along a direction orthogonal to the transport direction of the liquid crystal substrate 16.
  • the number of nozzle holes 24 arranged in the direction orthogonal to the transport direction of the liquid crystal substrate 16 is larger than the number of nozzle holes 24 arranged in the transport direction of the liquid crystal substrate 16.
  • a plurality of ink chambers 26 are further formed in the inkjet head 21p.
  • the plurality of ink chambers 26 are formed in the nozzle plate 32.
  • the plurality of ink chambers 26 are formed corresponding to the plurality of nozzle holes 24, respectively.
  • Each nozzle hole 24 communicates with the ink chamber 26.
  • the ink chamber 26 is formed on the opposite side of the nozzle surface 22 with respect to the nozzle hole 24.
  • the ink chamber 26 is formed so as to open on the side opposite to the position where the nozzle hole 24 communicates. With the nozzle plate 32 attached to the head body 31, the opening of the ink chamber 26 is closed by the flexible plate 38. Ink is always stored in the ink chamber 26 by an ink supply mechanism described later.
  • a plurality of piezo elements 36 are fixed to the flexible plate 38.
  • Each of the plurality of piezo elements 36 is provided at a position facing the plurality of ink chambers 26 with a flexible plate 38 interposed therebetween.
  • the piezo element 36 is electrically connected to the drive unit 34.
  • the flexible plate 38 bends into the ink chamber 26. Since the volume in the ink chamber 26 decreases with the deformation of the flexible plate 38, the ink stored in the ink chamber 26 is ejected through the nozzle holes 24.
  • FIG. 4 is a cross-sectional view showing the ink jet head taken along line IV-IV in FIG.
  • the ink supply mechanism for supplying ink to the ink chamber 26 will be described with reference to FIGS.
  • An ink supply pipe 29, an ink supply chamber 28, and a branch pipe 27 are further formed in the inkjet head 21p.
  • the ink supply pipe 29 and the ink supply chamber 28 are provided as supply holes for supplying the ink introduced into the inkjet head 21 toward the nozzle holes 24.
  • the ink supply pipe 29 and the ink supply chamber 28 are provided inside the inkjet head 21 as supply holes that form a passage through which ink flows toward the nozzle holes 24.
  • the ink supply chamber 28 is formed in the nozzle plate 32.
  • the ink supply chambers 28 are respectively formed at positions on both sides of the plurality of nozzle holes 24 in the cross section shown in FIGS.
  • the branch pipe 27 is formed on the nozzle plate 32.
  • the branch pipe 27 is formed to communicate between the ink supply chamber 28 and the plurality of ink chambers 26.
  • the branch pipe 27 extends linearly along a direction perpendicular to the transport direction of the liquid crystal substrate 16 through the ink chambers 26 spaced apart in the transport direction of the liquid crystal substrate 16.
  • the two ink supply chambers 28 are communicated with each other.
  • the branch pipe 27 is branched and extended from the linearly extending portion toward each ink chamber 26.
  • the ink supply pipe 29 is formed in the head main body 31.
  • the ink supply pipe 29 is formed in communication with the ink supply chamber 28.
  • the ink supply pipe 29 is formed at a position overlapping the ink supply chamber 28 when the nozzle surface 22 is viewed from the front.
  • a pipe for supplying ink from the outside to the ink jet head 21p is connected to the ink supply pipe 29.
  • the ink supply pipe 29 and the ink supply chamber 28 are formed in the ink jet head 21p without opening in the nozzle surface 22.
  • ink is supplied to the ink supply chamber 28 through the ink supply pipe 29.
  • ink is ejected through the nozzle holes 24
  • the inside of the ink chamber 26 becomes negative pressure. Therefore, the ink supplied to the ink supply chamber 28 is supplied to the ink chamber 26 as needed through the branch pipe 27.
  • the nozzle surface 22 of each inkjet head 21p is formed with a nozzle hole region 41 in which the nozzle holes 24 are opened, an ink supply pipe 29 and an ink supply chamber 28, and is closed. Is defined as a closed region 42 (42m, 42n).
  • a closed region 42 42m, 42n.
  • the closed area 42m, the nozzle hole area 41, and the closed area 42n are arranged in a direction orthogonal to the transport direction of the liquid crystal substrate 16. That is, the nozzle hole region 41 is disposed at the center of the nozzle surface 22 and the blocking regions 42 are disposed at both ends of the nozzle surface 22 in a direction orthogonal to the transport direction of the liquid crystal substrate 16.
  • the plurality of inkjet heads 21p are provided such that the nozzle hole region 41 and the closed region 42 are arranged in a line in a direction orthogonal to the transport direction of the liquid crystal substrate 16.
  • the nozzle hole regions 41 and the closed regions 42 (42m, 42n) are alternately arranged.
  • the inkjet coating apparatus 10 has a cleaning device 50 for wiping off ink adhering to the nozzle surface 22. Next, the structure of the cleaning device 50 will be described.
  • the cleaning device 50 includes a cleaning roller 51, a base member 54, and a transfer arm 56.
  • the cleaning roller 51 is detachably attached to the base member 54.
  • the transport arm 56 is provided as a moving mechanism unit for moving the cleaning roller 51 and the inkjet head 21 relative to each other.
  • the transport arm 56 is connected to the base member 54, and is provided so that the cleaning roller 51 attached to the base member 54 can be transported in the horizontal direction indicated by the arrow 102.
  • the transport arm 56 is provided so that the cleaning roller 51 can be transported in a direction perpendicular to the transport direction of the liquid crystal substrate 16.
  • the means for transporting the cleaning roller 51 is not limited to the form of the transport arm 56, and may be, for example, a form using a rail or a conveyor.
  • FIG. 5 is a perspective view showing the cleaning roller in FIG. Referring to FIG. 5, the cleaning roller 51 has a cylindrical appearance.
  • the cleaning roller 51 has a core cylinder 63 and a strip-shaped knitted fabric 64 as an absorber.
  • the core cylinder 63 has a cylindrical shape extending along the axis of the central axis 110 that is a virtual line.
  • the strip knitted fabric 64 has a strip shape having a long side in one direction and a short side in a direction orthogonal to the one direction.
  • the strip knitted fabric 64 is wound around the core cylinder 63 in multiple layers.
  • the strip-shaped knitted fabric 64 is wound around the central axis 110.
  • the strip-shaped knitted fabric 64 has a constant diameter in the axial direction of the central shaft 110.
  • FIG. 6 is a bottom view showing the nozzle surface wiping process by the cleaning roller.
  • the cleaning roller 51 is positioned such that the central shaft 110 extends in a direction orthogonal to the conveyance direction.
  • the cleaning roller 51 (band-shaped knitted fabric 64) is set to have a size slightly larger than the nozzle surface 22 in the axial direction of the central shaft 110.
  • the cleaning roller 51 sequentially passes below the plurality of inkjet heads 21p while moving parallel to the surface of the nozzle surface 22. During this time, the outer peripheral surface of the belt-shaped knitted fabric 64 comes into contact with the nozzle surface 22 of each inkjet head 21p, so that the ink attached to the nozzle surface 22 is wiped off.
  • the belt-shaped knitted fabric 64 and the inkjet head 21 are moved relative to each other by moving the cleaning roller 51.
  • the present invention is not limited to this, and, for example, is stationary.
  • the inkjet head 21 may be moved with respect to the cleaning roller 51.
  • the cleaning roller 51 may be configured using, for example, a woven fabric or a non-woven fabric instead of the knitted fabric. Moreover, it is not restricted to the structure which winds a strip
  • FIG. 7 is a cross-sectional view showing the state of the nozzle surface before wiping with the cleaning roller.
  • the ink adheres to the nozzle surface 22 as the ink is ejected from the nozzle hole 24.
  • the amount of adhering ink increases in the nozzle hole region 41 close to the nozzle hole 24, and the amount of adhering ink decreases in the closed region 42 far from the nozzle hole 24.
  • the driving force accompanying the deformation of the flexible plate 38 (see FIG. 3) is applied to the surface layer ink on the nozzle surface 22. This causes a problem that ink droplets are not properly ejected. For this reason, in the inkjet coating apparatus 10 in this Embodiment, the cleaning process 50 is used and the wiping off process of the nozzle surface 22 is implemented.
  • FIG. 8 is a bottom view showing the conveying direction of the cleaning roller in an inkjet coating apparatus for comparison.
  • FIG. 9 is a cross-sectional view showing a nozzle surface wiping process in the inkjet coating apparatus for comparison in FIG.
  • FIG. 10 is a cross-sectional view illustrating a state of the nozzle surface after the wiping process in FIG. 9 is performed.
  • the cleaning roller 51 is moved in a direction parallel to the transport direction of the liquid crystal substrate 16 (indicated by an arrow 101 in FIGS. 1 and 2). The case where it conveys in the direction shown) is assumed.
  • FIG. 11 is a cross-sectional view showing a state of the nozzle surface after the wiping process in FIG. 6 is performed.
  • cleaning roller 51 is set in a direction perpendicular to the transport direction of liquid crystal substrate 16 (direction indicated by arrow 102). Move.
  • the strip-shaped knitted fabric 64 wipes the nozzle hole regions 41 and the closed regions 42 of the plurality of inkjet heads 21p arranged in one direction alternately.
  • the closed region 42 is wiped continuously after wiping the nozzle hole region 41 with the band-shaped knitted fabric 64.
  • the inkjet coating apparatus 10 wipes the inkjet head 21 having the nozzle surface 22 and the nozzle surface 22.
  • a belt-like knitted fabric 64 serving as an absorbent body and a transport arm 56 serving as a moving mechanism unit are provided.
  • the inkjet head 21 has a plurality of nozzle holes 24 that are opened in the nozzle surface 22 and eject ink, and an ink supply pipe 29 and an ink supply chamber 28 that serve as supply holes for supplying ink toward the plurality of nozzle holes 24. Is formed.
  • the strip-shaped knitted fabric 64 absorbs ink attached to the nozzle surface 22.
  • the transport arm 56 relatively moves the belt-like knitted fabric 64 and the inkjet head 21 in a state where the belt-shaped knitted fabric 64 and the nozzle surface 22 face each other.
  • the nozzle surface 22 When the nozzle surface 22 is viewed from the front, the nozzle surface 22 is disposed adjacent to the nozzle hole region 41 as a first region where a plurality of nozzle holes 24 are opened, and the nozzle hole region 41.
  • the ink supply pipe 29 and the closed region 42 as the second region onto which the ink supply chamber 28 is projected are defined.
  • the transport arm 56 relatively moves the band-shaped knitted fabric 64 and the inkjet head 21 along the direction in which the nozzle hole region 41 and the closed region 42 are arranged.
  • the nozzle surface 22 is locally moved by moving the cleaning roller 51 in the direction in which the nozzle hole region 41 and the closed region 42 are arranged. Prevent drying out. Thereby, it is possible to prevent the ink solid matter from being generated on the nozzle surface 22 and to realize the ink jet coating apparatus 10 in which ink is stably ejected from the nozzle hole 24.
  • the inkjet coating apparatus 10 is used for the step of forming an alignment film on the surface of a substrate for a liquid crystal display.
  • the present invention is not limited to this. You may utilize for the process of forming a resist.
  • FIG. 12 is a bottom view showing a modification of the ink jet coating apparatus shown in FIG.
  • a plurality of inkjet heads 21p are provided side by side in a plurality of rows in the transport direction of liquid crystal substrate 16 (the direction indicated by arrow 101).
  • the nozzle hole regions 41 of the respective ink jet heads 21p are provided in a staggered manner along the direction orthogonal to the transport direction of the liquid crystal substrate 16 (the direction indicated by the arrow 102), that is, the moving direction of the cleaning roller 51.
  • the plurality of inkjet heads 21p are arranged such that the range of the nozzle hole region 41 partially overlaps in the transport direction of the liquid crystal substrate 16.
  • the nozzle hole area 41 and the closed area 42 are alternately wiped by the cleaning roller 51, so that the closed area 42 can be prevented from being extremely dried.
  • the cleaning roller 51 for wiping the nozzle surfaces 22 arranged in a staggered pattern may be provided corresponding to each row of the plurality of inkjet heads 21p, or only one so as to wipe all rows at once. May be.
  • the present invention is mainly used as an apparatus for forming an alignment film of a liquid crystal display and a functional film such as a resist on a substrate.
  • 10 inkjet coating device 12 mounting table, 14 transport arm, 16 liquid crystal substrate, 16a main surface, 21,21p inkjet head, 22 nozzle face, 24 nozzle hole, 26 ink chamber, 27 branch pipe, 28 ink supply chamber, 29 ink Supply pipe, 31 head body, 32 nozzle plate, 34 drive unit, 35 opening, 36 piezo element, 38 flexible plate, 41 nozzle hole area, 42, 42m, 42n closed area, 50 cleaning device, 51 cleaning roller, 54 Base member, 56 transfer arm, 63 core cylinder, 64 strip knitted fabric, 73 solid material.

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  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un dispositif d'application de jet d'encre comportant une tête de jet d'encre (21) avec une surface de buse (22), un élément tissé en forme de bande (64) qui essuie la surface de buse (22) et un bras de transport (56). La tête de jet d'encre (21) est constituée des éléments suivants : des ouvertures de buse (24) dans la surface de buse (22) qui éjectent l'encre ; et un tube d'alimentation en encre ainsi qu'une chambre d'alimentation en encre qui envoient l'encre vers les trous de buse (24). Dans une vue de devant de la surface de buse (22), celle-ci comporte les éléments suivants : une région d'ouverture de buse (41) dans laquelle sont formées les ouvertures de buse (24) ; et une région fermée (42) adjacente à la région d'ouverture de buse (41) et sur laquelle font saillie le tube d'alimentation en encre et la chambre d'alimentation en encre qui sont formés dans la tête de jet d'encre (21). Le bras de transport (56) déplace l'élément tissé en forme de bande (64) par rapport à la tête de jet d'encre (21) dans la direction dans laquelle sont placées la région d'ouverture de buse (41) et la région fermée (42).
PCT/JP2011/061875 2010-06-08 2011-05-24 Dispositif d'application de jet d'encre WO2011155324A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800279014A CN102933315A (zh) 2010-06-08 2011-05-24 喷墨涂敷装置
JP2012519330A JPWO2011155324A1 (ja) 2010-06-08 2011-05-24 インクジェット塗布装置

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Application Number Priority Date Filing Date Title
JP2010-131037 2010-06-08
JP2010131037 2010-06-08

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WO2011155324A1 true WO2011155324A1 (fr) 2011-12-15

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Publication number Priority date Publication date Assignee Title
ES2581514T3 (es) * 2013-08-06 2016-09-06 Robatech Ag Dispositivo de dispensación de materiales fluyentes
TWI724283B (zh) * 2017-03-29 2021-04-11 日商住友重機械工業股份有限公司 膜形成裝置及膜形成方法
CN107367869A (zh) * 2017-07-24 2017-11-21 张家港康得新光电材料有限公司 喷墨印刷设备及取向膜的制备方法

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