WO2018110034A1 - Tête à jet d'encre, procédé de fabrication de tête à jet d'encre et dispositif d'impression à jet d'encre - Google Patents

Tête à jet d'encre, procédé de fabrication de tête à jet d'encre et dispositif d'impression à jet d'encre Download PDF

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Publication number
WO2018110034A1
WO2018110034A1 PCT/JP2017/035732 JP2017035732W WO2018110034A1 WO 2018110034 A1 WO2018110034 A1 WO 2018110034A1 JP 2017035732 W JP2017035732 W JP 2017035732W WO 2018110034 A1 WO2018110034 A1 WO 2018110034A1
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Prior art keywords
nozzle
ink
ink jet
manufacturing
layer
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PCT/JP2017/035732
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English (en)
Japanese (ja)
Inventor
下村　明久
綾子 鈴木
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コニカミノルタ株式会社
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Priority to JP2018556199A priority Critical patent/JPWO2018110034A1/ja
Publication of WO2018110034A1 publication Critical patent/WO2018110034A1/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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • 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

Definitions

  • the present invention relates to an inkjet head, a method for manufacturing an inkjet head, and an inkjet recording apparatus. More specifically, a liquid repellent layer capable of maintaining sufficient reliability and durability is formed on a nozzle surface to prevent liquid from adhering to the nozzle surface.
  • the present invention relates to an ink jet head capable of discharging excellent droplets, an ink jet head manufacturing method, and an ink jet recording apparatus.
  • an ink jet recording apparatus (ink jet printer) that forms an image on a recording medium by ejecting ink droplets from nozzles of an ink jet head.
  • ink jet printer when ink droplets are ejected, the ink adheres to the nozzle surface (around the nozzle ejection side opening) due to the effects of ink mist generated in the printer and ink rebound from the recording medium. May end up. It is known that when ink is adhered to the nozzle surface, the ejection angle is bent due to the influence of the ink adhered to the nozzle surface when ink droplets are ejected from the nozzle.
  • liquid repellent layer fluorine is removed by a dehydration condensation reaction by silane coupling ([—OH] + [HO—Si—RF] ⁇ [H 2 O] + [— O—Si—RF]).
  • a film formed by bonding an organic functional group is known (Patent Document 1).
  • a layer having improved durability using a diamond-like carbon (DLC) film containing fluorine has been proposed (Patent Documents 2 and 3).
  • JP 2007-230061 A JP 2012-091380 A Japanese Patent Laying-Open No. 2015-085616
  • the liquid repellency of the liquid repellent layer as described above depends on the fluorine doping amount. Since the liquid repellency only needs to be expressed on the surface of the liquid repellent layer, fluorine may be contained only in the vicinity of the surface of the liquid repellent layer. However, in the liquid repellent layer in the conventional ink jet head, since the entire liquid repellent layer contains fluorine uniformly, the reliability and durability of the entire liquid repellent layer may not be sufficiently maintained.
  • the present invention forms a liquid repellent layer that can maintain sufficient reliability and durability on the nozzle surface facing the recording medium, prevents the liquid from adhering to the nozzle surface, and discharges excellent droplets. It is an object of the present invention to provide an inkjet head, an inkjet head manufacturing method, and an inkjet recording apparatus that can be performed.
  • An inkjet head having a nozzle plate on which at least one nozzle is formed and ejecting droplets from the nozzle to form an image on a recording medium
  • a liquid repellent layer in which a first layer made of a non-single-crystal carbon film and a second layer made of a fluorine-containing non-single-crystal carbon film are laminated is formed around the discharge side opening of the nozzle head.
  • a method of manufacturing an inkjet head having a nozzle plate on which at least one nozzle is formed, and ejecting droplets from the nozzle to form an image on a recording medium Forming the nozzle, A first layer made of a non-single crystal carbon film is formed around the discharge side opening of the nozzle, A liquid repellent layer is formed by laminating a second layer made of a fluorine-containing non-single-crystal carbon film on the first layer, A method of manufacturing an ink jet head, wherein the surface of the liquid repellent layer is masked to perform a process of eliminating liquid repellency on the inner wall surface of the nozzle. 9.
  • 14 The method of manufacturing an ink jet head according to any one of 8 to 11, wherein the nozzle is formed by laser processing on a flat nozzle plate material.
  • 15. The method of manufacturing an ink jet head according to any one of 8 to 12 and 14, wherein the nozzle plate is formed of stainless steel. 16.
  • a liquid repellent layer capable of maintaining sufficient reliability and durability is formed on the nozzle surface facing the recording medium, preventing liquid from adhering to the nozzle surface, and good droplet discharge.
  • the perspective view (a) and bottom view (b) which show the ink jet head concerning the present invention 1 is an exploded perspective view showing the main part of the inkjet head shown in FIG.
  • FIG. 2 is an exploded perspective view schematically showing the head chip and the wiring board shown in FIG.
  • FIG. 2 is a plan view schematically showing the head chip shown in FIG. Sectional drawing which shows the structure of the nozzle plate of the inkjet head shown in FIG.
  • the figure explaining the manufacturing method of the inkjet head which concerns on this invention The figure explaining the other example of the manufacturing method of the inkjet head which concerns on this invention Sectional drawing which shows the manifold with which the inkjet head shown in FIG. 1 is equipped
  • the perspective view which shows the structure of the principal part of the inkjet recording device which concerns on this invention.
  • FIG. 1 is a perspective view (a) and a bottom view (b) showing an inkjet head 100 according to the present invention.
  • FIG. 2 is an exploded perspective view showing a main part of the inkjet head 100.
  • FIG. 3 is an exploded perspective view schematically showing the head chip and the wiring board shown in FIG.
  • the ink discharge direction from the nozzle 11a (see FIG. 3) of the inkjet head 100 is referred to as “downward”, and the arrangement direction of the plurality of nozzles 11a is referred to as “channel row direction” or “nozzle row direction”.
  • the horizontal direction orthogonal to the “channel row direction” is referred to as “side”.
  • “Upper” and “lower” mean “upper vertical direction” and “lower vertical direction”.
  • the use state of the ink jet head 100 of the present invention is not limited to the state in which the ink discharge surface faces downward in the vertical direction, and may be used while being inclined.
  • the ink jet head 100 of this embodiment is mounted on an ink jet recording apparatus (ink jet printer) described later.
  • the inkjet head 100 has a head chip 1 having a plurality of channels 13 in which nozzles 11 a communicate with each other.
  • Ink is introduced from the manifold 5 into the channel 13 of the head chip 1.
  • the manifold 5 is housed inside the housing 6.
  • the housing 6 covers the periphery of the head chip 1.
  • a common ink chamber is formed for storing ink and supplying ink to each channel 13.
  • the bottom surface of the housing 6 is opened, and the bottom surface opening is closed by attaching the cap receiving plate 7.
  • a cover member 9 is attached to the housing 6 as shown in FIG.
  • the manifold 5 is provided with an ink supply tube 5a and an ink recovery tube 5b. Connection portions 7a and 7b are attached to the ink supply tube 5a and the ink recovery tube 5b, respectively.
  • the ink jet head 100 has a wiring board 2 on which a wiring pattern for supplying power to the head chip 1 is formed.
  • a drive circuit board 4 is connected to the wiring board 2 via a flexible board 3.
  • the wiring board 2 is a glass substrate, for example.
  • the wiring board 2 may be arranged on either the manifold 5 (common ink chamber) side or the nozzle 11a side of the head chip 1.
  • FIG. 4 is a plan view schematically showing the head chip 1 shown in FIG.
  • the head chip 1 is a substantially quadrangular prism-like member that is long in the channel row direction, and a plurality of nozzles 11 a that serve as ink discharge ports are formed on the lower surface of the head chip 1.
  • An established nozzle plate 11 is arranged.
  • the nozzle 11a is a through hole that allows the channel 13 to communicate with the outside (downward).
  • the nozzle 11a serves as a flow path for ink discharged from the inside of each channel 13 to the outside (downward).
  • the nozzle plate 11 is preferably formed of stainless steel, nickel or other metal material, polyimide resin material or other organic material, or silicon material.
  • stainless steel and polyimide resin materials are superior.
  • stainless steel and polyimide resin materials are superior.
  • silicon materials are superior.
  • polyimide resin material is excellent.
  • the head chip 1 is composed of two actuator members 1a and 1a.
  • the actuator member 1a is made of a piezoelectric material that is displaced by application of a voltage.
  • the actuator member 1 a has a plurality of channels (pressure chambers) 13 and a plurality of dummy channels (pseudo pressure chambers) 14 formed by a plurality of partition walls 12.
  • Each partition 12 is formed in a comb-teeth shape that is open vertically and laterally.
  • a space between the partition walls 12 is a channel 13 or a dummy channel 14.
  • a side wall member 15 is disposed along the side surface of the actuator member 1a.
  • the side wall member 15 is abutted against the front end surface of each partition wall portion 12 formed in a comb-teeth shape, and each channel 13 and each dummy channel 14 are through holes extending from the upper surface portion to the lower surface portion of the actuator member 1a.
  • the configuration of the head chip 1 is not limited to that described above, and the comb teeth formed by the partition walls 12 of the two actuator members 1a and 1a are opened in the same direction.
  • the comb-shaped tip of the member 1 a may be butted against the flat side surface of the other actuator member 1 a, and the comb-shaped tip of the other actuator member 1 a may be butted against the side surface of the side wall member 15. .
  • the comb teeth formed by the partition walls 12 of the two actuator members 1a and 1a are opened toward the outer sides that are separated from each other, and the side wall members 15 are disposed on these outer sides, respectively. Also good.
  • the channel 13 and the dummy channel 14 are not formed by the comb-like partition wall 12 and the side wall member 15, but may be formed as a through hole in the actuator member 1a.
  • the number of channel rows is not limited to two, and three or more actuator members 1a may be provided to make three or more rows.
  • the pitch between dots formed on the recording medium can be reduced without reducing the pitch between the ink channels 13.
  • Each channel 13 has a substantially rectangular opening cross section, and is formed with the vertical direction as the longitudinal direction.
  • Each channel 13 is a straight type whose size and shape are not substantially changed in the longitudinal direction (vertical direction) from the inlet (upper end) to the outlet (lower end).
  • Each channel 13 and each dummy channel 14 are parallel to each other and arranged in one direction (channel column direction) to form a channel column.
  • Each channel 13 has an upper end communicating with the inside of the manifold 5 (common ink chamber) through an opening 22 provided in the wiring board 2 corresponding to each channel 13.
  • Each channel 13 is filled with ink supplied from the inside of the manifold 5 through each opening 22.
  • the lower end of each channel 13 communicates outward (downward) via the nozzle 11a.
  • Each dummy channel 14 is closed by the wiring board 2 at the upper end and closed by the nozzle plate 11 at the lower end to form a sealed air chamber.
  • a driving electrode (not shown) for driving the partition wall 12 is provided on the inner surface of each channel 13.
  • the drive electrode is an independent metal film for each channel 13 and is connected to the wiring pattern of the wiring substrate 2 attached to the upper surface of the head chip 1.
  • the partition wall 12 forms both walls of each channel 13. Since the partition wall portion 12 is made of a piezoelectric material, the partition wall portion 12 is shear-deformed when a voltage is applied from the drive circuit boards 4 and 4 through the wiring patterns and drive electrodes of the flexible boards 3 and 3 and the wiring board 2. .
  • volume fluctuation (expansion or contraction) of the channel 13 occurs. Due to volume fluctuation (expansion or contraction) of the channel 13, pressure is applied to the ink in the channel 13, and this ink is ejected through the nozzle 11a. In the head chip 1, the ink discharge amount is adjusted by adjusting the vertical length (height) of the channel 13.
  • the silicon material is a hard material.
  • the vicinity of the channel 13 is made thin, crosstalk to the adjacent channel 13 due to the driving of the partition wall portion 12 is prevented. be able to.
  • each channel 13 Two partition walls 12, 12 are provided for each channel 13, and form both walls of each channel 13. There is a gap between the partition wall portion 12 constituting the wall portion of one channel 13 and the partition wall portion 12 constituting the wall portion of the adjacent channel 13, and this gap is the dummy channel 14. Thus, each channel 13 can be driven (expanded or contracted) independently.
  • the dummy channel 14 is located on both sides of at least the channel 13, and the volume fluctuation occurs with the volume fluctuation of the adjacent channel 13.
  • the channels 13 and the dummy channels 14 are alternately arranged one by one, so that the dummy channels 14 are positioned on both sides of each channel 13.
  • the ink jet head 100 may be configured such that the adjacent channels 13 and 13 share one partition 12 without providing the dummy channel 14. In this case, since each channel 13 cannot be driven (expanded or contracted) independently, so-called three-cycle driving is performed.
  • the wiring substrate 2 disposed on the upper surface of the head chip 1 is formed in a substantially rectangular plate shape that is long in the channel row direction, as shown in FIGS. Each width of the wiring substrate 2 in the channel row direction and the lateral direction is formed larger than that of the head chip 1.
  • the wiring board 2 has a plurality of openings 22, and the upper ends of the channels 13 are communicated with the inside of the manifold 5 (common ink chamber) through these openings 22.
  • the openings 22 are formed corresponding to the channels 13 and arranged in the channel row direction.
  • the lower end portion of the manifold 5 is attached and fixed to the outer edge portion of the wiring board 2 by bonding.
  • the opening 22 of the wiring board 2 may be a single opening formed so that all the channels 13 face the manifold 5 side.
  • the two flexible boards 3 and 3 connected to the drive circuit boards 4 and 4 are connected to both side edges of the wiring board 2.
  • the flexible board 3 has a plurality of wirings that are electrically connected to the drive circuit board 4, and the wirings and the wiring pattern of the wiring board 2 are electrically connected to each other. As a result, a signal from the drive circuit board 4 is applied to the drive electrode in each channel 13 via the flexible board 3.
  • FIG. 5 is a cross-sectional view showing the configuration of the nozzle plate of the inkjet head shown in FIG.
  • an ink repellent ink that is a liquid repellent layer.
  • a conductive coating layer 60 is formed.
  • the ink repellent coating layer 60 is configured by laminating a first layer 61 made of a non-single crystal carbon film and a second layer 62 made of a fluorine-containing non-single crystal carbon film.
  • the first layer 61 does not contain fluorine.
  • the interface between the first layer 61 and the second layer 62 preferably has no Si—O bond.
  • At least one of the first layer 61 and the second layer 62 is a diamond-like carbon (DLC) film.
  • the diamond-like carbon film is an amorphous film having characteristics similar to diamond.
  • the interface between the first layer 61 and the second layer 62 does not have a Si—O bond due to a silane coupling agent.
  • the ink repellency is not deteriorated and the durability is high.
  • the entire second layer 62 has no Si—O bond, the durability under the use of alkaline ink becomes better.
  • the second layer 62 is a diamond-like carbon (DLC) film, the mechanical hardness is high, and the nozzle surface P is in contact with the recording medium M or when the nozzle surface P is maintained (wiped).
  • the ink repellent coating layer 60 is difficult to peel off and has high durability.
  • the ink repellent coating layer 60 is preferably formed on the entire lower surface of the nozzle plate 11 from the viewpoint of durability, but may be formed only on the periphery of the discharge side opening of the nozzle 11a. The reason why the ink discharge angle is bent is because the ink adheres to the periphery of the discharge side opening of the nozzle 11a.
  • water-based ink such as disperse dye ink or sublimation ink
  • a water-based ink has an alkaline property by containing an additive such as a dispersant.
  • a fabric coated with a pretreatment agent having a liquid property of alkaline may be used to improve color developability.
  • the liquidity is often alkaline for the purpose of preventing penetration into paper.
  • the liquid repellent layer that has secured adhesion by silane coupling is hydrolyzed ([H 2 O] + [— O—Si—R—F] ⁇ [—OH] + [ HO—Si—R—F]) is promoted, and sufficient reliability and durability cannot be maintained.
  • Alkaline pretreatment agents on the fabric surface for raising treatments often affect the reliability and durability of the liquid repellent layer.
  • the nozzle surface is wiped off with paper, cloth or a resin blade.
  • the liquid repellent layer is easily peeled off, and the reliability and durability are lowered.
  • the ink repellent coating layer 60 has a remarkable effect, particularly when the droplets ejected from the nozzle 11a are alkaline ink droplets.
  • the ink-repellent coating layer 60 in the present invention has no Si—O bond at the interface between the first layer 61 and the second layer 62, the ink-repellent deterioration is observed even when alkaline ink is used. It is not durable. Further, if the entire second layer 62 has no Si—O bond, the durability under the use of alkaline ink becomes better. In this ink jet head, even when the maintenance for wiping the nozzle surface P with paper, cloth, resin blade or the like is performed in an alkaline environment, the liquid repellent layer 60 is not peeled off, and the reliability and durability are high.
  • FIG. 6 is a diagram for explaining a method of manufacturing an ink jet head according to the present invention.
  • a flat nozzle plate material 11b is formed of stainless steel, nickel or other metal material, polyimide resin material or other organic material, or silicon material.
  • the nozzle plate 11 is formed by forming the nozzle 11a on the nozzle plate material.
  • the nozzle 11a can be formed by laser processing on the nozzle plate material.
  • the nozzle 11a can be formed by polishing the periphery of the hole after punching the nozzle plate material by punching.
  • the nozzle plate 11 having the nozzles 11a can be directly formed by electroforming. When the nozzle plate 11 is formed by electroforming, nickel is preferably used as the material.
  • a first layer 61 made of a non-single-crystal carbon film is formed on the nozzle surface P (the peripheral portion of the discharge side opening of the nozzle 11a).
  • a CVD (Chemical Vapor Deposition) method thermal CVD, photo CVD, plasma CVD) or a PVD (Physical Vapor Deposition) method can be preferably employed.
  • a plasma CVD method is employed.
  • the PVD method is a method in which a high-energy atomic argon or its ion is collided with a solid metal target such as aluminum or titanium in a high vacuum, the metal atom is blown off, and the metal atom is deposited in a layered manner on the workpiece surface. .
  • the first layer 61 As a diamond-like carbon film, a hydrocarbon gas such as acetylene (C 2 H 2 ) is used as a raw material gas, and the raw material gas is turned into plasma in the chamber, and the gas-phase synthesized hydrocarbon is used. Vapor deposition is performed on the surface of the nozzle plate 11.
  • a hydrocarbon gas such as acetylene (C 2 H 2 ) is used as a raw material gas, and the raw material gas is turned into plasma in the chamber, and the gas-phase synthesized hydrocarbon is used. Vapor deposition is performed on the surface of the nozzle plate 11.
  • a second layer 62 made of a fluorine-containing non-single-crystal carbon film is formed on the first layer 61 to form an ink-repellent coating layer 60.
  • a plasma CVD method or a PVD method can be preferably employed.
  • the second layer 62 has liquid repellency by containing fluorine.
  • a gas containing fluorine is used as a source gas during film formation, or the surface of the non-single-crystal carbon film using a gas containing fluorine after film formation.
  • a method of modifying the surface of the non-single-crystal carbon film with fluorine can be employed by a method such as treating the surface.
  • fluorine can be introduced to the surface of the non-single-crystal carbon film using a surface treatment agent containing a very stable perfluoroalkyl radical as an active component without using fluorine gas.
  • the ink repellent coating layer 60 is such that the second layer 62 does not have a Si—O bond due to the silane coupling agent, and the Si—O bond is formed at the interface between the first layer 61 and the second layer 62. It is preferable to have no bond.
  • at least one of the first layer 61 and the second layer 62 is preferably a diamond-like carbon (DLC) film.
  • the surface of the ink-repellent coating layer 60 is masked to perform a process of eliminating the liquid repellency on the inner wall surface of the nozzle 11a.
  • the treatment for eliminating the liquid repellency it is preferable to employ a plasma treatment containing oxygen.
  • the ink repellent coating layer 60 is formed by masking the peripheral portion of the inlet side opening of the nozzle 11a (the back surface of the nozzle surface P), the process of eliminating the liquid repellency on this portion is unnecessary.
  • the first layer 61 and the second layer 62 do not need to be separated at a clear interface, and the fluorine content gradually increases toward the surface in the thickness direction of the ink-repellent coating layer 60.
  • the layer having a fluorine content of less than a predetermined value may be used as the first layer 61, and the layer having a fluorine content of a predetermined value or more may be used as the second layer 62.
  • Such an ink-repellent coating layer 60 gradually increases the fluorine concentration in the raw material gas from the middle during the film formation of the first layer 61, and continues from the point when the fluorine concentration exceeds a predetermined value.
  • the two layers 62 can be formed by the film formation process.
  • FIG. 7 is a diagram for explaining another example of a method for manufacturing an ink jet head according to the present invention.
  • the nozzle 11a is formed after the ink repellent coating layer 60 is formed on the flat nozzle plate material 11b. It may be.
  • FIG. 7 (a) As shown in FIG. 7 (b), the nozzle surface P of the nozzle plate material 11b (periphery of the portion where the discharge side opening of the nozzle 11a is formed) is shown.
  • the first layer 61 is formed as described above.
  • the second layer 62 is laminated on the first layer 61 as described above to form the ink repellent coating layer 60.
  • the nozzle 11 a is formed on the nozzle plate material 11 b on which the ink-repellent coating layer 60 is formed to form the nozzle plate 11.
  • the nozzle 11a can be formed by any of laser processing, punching and polishing, and electroforming. However, when the nozzle 11a is formed after the ink repellent coating layer 60 is formed in this way, it is preferable to form the nozzle 11a by laser processing using a nozzle plate material made of stainless steel or polyimide.
  • the nozzle 11a is formed after the ink-repellent coating layer 60 is formed, it is not necessary to perform the process of eliminating the liquid repellency on the inner wall surface of the nozzle 11a.
  • FIG. 8 is a cross-sectional view showing a manifold provided in the ink jet head shown in FIG.
  • the manifold 5 As shown in FIGS. 2 and 8, the manifold 5 is made of a synthetic resin material or the like into a horizontally long box shape having an opening 51a on the lower surface. In the manifold 5, the opening 51 a is closed by the wiring substrate 2 bonded to the lower surface portion.
  • the internal space of the manifold 5 is a common ink chamber 51 in which ink supplied from the ink tank 201 in the ink jet recording apparatus 200 is stored.
  • an ink supply pipe 5a serving as a flow path for supplying ink into the common ink chamber 51 is connected.
  • the ink supply pipe 5 a communicates with the common ink chamber 51 on the side farther from the wiring board 2 (upper side).
  • a connecting portion 7a is provided on the upper end side of the ink supply pipe 5a.
  • the connecting portion 7a is detachably connected to the connecting portion 206a on the ink jet recording apparatus 200 side.
  • the connecting portion 206 a on the ink jet recording apparatus 200 side communicates with the ink transfer tube 202.
  • the common ink chamber 51 is provided with an ink collection pipe 5b serving as a flow path for collecting ink from the common ink chamber 51.
  • the ink recovery tube 5 b communicates with the common ink chamber 51 on the side farther from the wiring board 2 (upper side).
  • a connecting portion 7b is provided on the upper end side of the ink recovery tube 5b.
  • the connecting portion 7b is detachably connected to the connecting portion 206b on the ink jet recording apparatus 200 side.
  • the connecting portion 206 b on the ink jet recording apparatus 200 side communicates with the ink return pipe 203. As a result, the ink jet head 100 can return ink to the ink jet recording apparatus 200.
  • the ink supply pipe 5a and the ink recovery pipe 5b are arranged apart from both ends of the common ink chamber 51 in the longitudinal direction.
  • the ink supply pipe 5a is disposed at the left end portion in FIG. 8 on the upper surface side of the manifold 5, and the ink recovery tube 5b is disposed on the right end portion in FIG. Is arranged.
  • the ink supplied from the ink supply pipe 5a to the common ink chamber 51 can flow toward the ink recovery pipe 5b throughout the common ink chamber 51. Accordingly, it is difficult to form a portion where the ink stays in the common ink chamber 51, and bubbles in the ink can be more efficiently eliminated.
  • FIG. 9 is a perspective view showing a configuration of a main part of the ink jet recording apparatus according to the present invention.
  • the inkjet recording apparatus includes the inkjet head 100 described above, a head support member 206 that supports the casing 6 of the inkjet head 100, and a control unit that controls the inkjet head 100. 204.
  • the ink jet recording apparatus 200 records an image by forming dots by ejecting ink from the ink jet head 100 on a recording medium M conveyed in a certain direction (sub-scanning direction) by a moving operation means (not shown).
  • a so-called one-pass ink jet recording apparatus the ink jet head 100 is fixedly arranged, and in the process of transporting the recording medium M, ink is ejected from the nozzles 11 a toward the recording medium M to record an image.
  • the ink jet head 1 is mounted on a head support member (carriage) 206, and the head support member 206 is reciprocated in the main scanning direction by a moving operation means. Ink is ejected from the nozzle 11a toward the recording medium M to record an image.
  • the ink jet recording apparatus 200 discharges from the nozzle 11a if the ink repellent coating layer 60 of the ink jet head 1 has no Si—O bond at the interface between the first layer 61 and the second layer 62.
  • the droplets are alkaline ink droplets and the fabric is used as the recording medium M, the effect of the ink repellent coating layer 60 is exhibited.
  • the liquid repellent layer whose adhesion is secured by silane coupling is hydrolyzed ([H 2 O] + [— O—Si -RF] ⁇ [-OH] + [HO-Si-RF]) is promoted, and sufficient reliability and durability cannot be maintained, but the ink repellent coating layer 60 is bonded to Si-O. If the ink does not have the ink, the ink repellency is not deteriorated even when the alkaline ink is used, and the durability is high.
  • the inkjet recording apparatus 200 has colors such as yellow (Y), magenta (M), cyan (C), and black (K).
  • a plurality of ink jet heads 1 for ink are mounted.
  • an ink tank 201 that stores ink and a common ink chamber 51 of the ink jet head 100 are communicated with each other by an ink transfer pipe 202 and an ink return pipe 203.
  • a transfer pump 205 serving as a flow path pressure applying means that is driven and controlled by the control unit 104 of the inkjet recording apparatus 200 is provided.
  • the transfer pump 205 is driven, the ink in the ink tank 201 is transferred to the inkjet head 100 via the ink transfer pipe 202. Further, when the transfer pump 205 is driven, the ink in the inkjet head 100 is returned to the ink tank 201 via the ink return pipe 203.
  • the transfer pump 205 performs transfer of the ink in the ink tank 201 to the inkjet head 100 and recovery of the ink transferred to the common ink chamber 51.
  • the ink tank 201 is not particularly limited, but is preferably partitioned into an ink transfer chamber 201b and an ink return chamber 201c by a partition plate 201a that does not reach the bottom surface of the tank.
  • one end of the ink transfer tube 202 is disposed in the ink transfer chamber 201b
  • one end of the ink return tube 203 is disposed in the ink return chamber 201c.
  • the partition plate 201a is provided to sufficiently degas the ink so that bubbles contained in the ink returned to the ink return chamber 201c do not flow into the ink transfer pipe 202 again. Since the bubbles themselves have high buoyancy, the bubbles are restricted from passing under the partition plate 201a and flowing into the ink transfer chamber 201b.
  • Such an embodiment is a preferred embodiment when the ink is circulated.
  • the total of these flow path resistances is taken into consideration. Under these conditions, conditions such as pressure applied by the transfer pump 205 are determined so that meniscus breakage from the nozzle 11a does not occur. Further, the total of the flow resistances of the individual ink discharge paths 11b and 11b is defined in consideration of conditions such as pressure applied by the transfer pump 205 so as not to cause a meniscus break from the nozzle 11a.
  • Each of the individual ink discharge paths 11b and 11b can have an opening area and a length appropriately set as long as the total of the flow resistance does not deviate from a predetermined value.
  • the present invention is not limited to the above-described embodiments, and various improvements and design changes may be made without departing from the spirit of the present invention.
  • the partition walls 12 and the channels 13 made of a piezoelectric material are alternately arranged in parallel, and the partition wall 12 is sheared by applying a voltage to the drive electrode of the partition wall 12.
  • the configuration of the head chip 1 is not limited to this.
  • the channel 13 has a channel 13 arranged side by side or two-dimensionally, and provided with an inlet and an outlet above and below in the direction perpendicular to the arrangement direction, and pressure is applied to the channel 13 by contraction of the piezoelectric element.
  • any head chip may be used as long as the ink is ejected from the nozzle 11 a communicating with the outlet of the channel 13.
  • the inkjet head 100 configured such that the ink discharge direction is substantially parallel to the vertical direction is shown, but the ink discharge direction may be any direction, for example, an inclination You may comprise so that it may become a direction or a horizontal direction.
  • a liquid repellent layer capable of maintaining sufficient reliability and durability is formed on the nozzle surface facing the recording medium, and liquid adhesion to the nozzle surface is prevented, which is favorable.
  • An ink jet head capable of discharging droplets, an ink jet head manufacturing method, and an ink jet recording apparatus can be provided.

Abstract

L'objectif de la présente invention est de fournir une tête à jet d'encre dans laquelle une couche repoussant les liquides conservant une fiabilité et une durabilité suffisantes est formée sur une surface de buse opposée à un support d'impression, et qui empêche l'adhérence de liquides sur la surface de buse et peut évacuer d'excellentes gouttelettes, et de fournir un procédé de fabrication de tête à jet d'encre et un dispositif d'impression à jet d'encre. Dans cette tête à jet d'encre pour former une image sur un support d'impression en évacuant des gouttelettes à partir de buses (11a) formées dans une plaque de buses (11), une couche repoussant les liquides (60) est formée autour des ouvertures côté évacuation des buses (11a) par stratification d'une première couche (61) formée à partir d'un film de carbone non monocristallin et d'une seconde couche (62) formée à partir d'un film de carbone non monocristallin contenant du fluor.
PCT/JP2017/035732 2016-12-16 2017-09-29 Tête à jet d'encre, procédé de fabrication de tête à jet d'encre et dispositif d'impression à jet d'encre WO2018110034A1 (fr)

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JP2018556199A JPWO2018110034A1 (ja) 2016-12-16 2017-09-29 インクジェットヘッド、インクジェットヘッドの製造方法及びインクジェット記録装置

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JP2016-244348 2016-12-16

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WO2018110034A1 true WO2018110034A1 (fr) 2018-06-21

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2983679B2 (ja) * 1990-04-30 1999-11-29 ゼロックス コーポレイション 塗被方法
US6315393B1 (en) * 1999-04-30 2001-11-13 Hewlett-Packard Company Ink-jet printhead
JP2003182072A (ja) * 2001-12-17 2003-07-03 Matsushita Electric Ind Co Ltd インクジェットヘッド及びインクジェット式記録装置
JP2004122384A (ja) * 2002-09-30 2004-04-22 Sharp Corp ノズルプレートの製造方法およびインクジェットヘッド
JP2004276568A (ja) * 2003-03-19 2004-10-07 Fuji Xerox Co Ltd インクジェット記録ヘッド
JP2006346965A (ja) * 2005-06-15 2006-12-28 Seiko Epson Corp 液体噴射ヘッド
JP2007119657A (ja) * 2005-10-31 2007-05-17 Seiko Epson Corp インクジェット捺染用インク組成物、これを用いた捺染方法、及び捺染物
JP2007261070A (ja) * 2006-03-28 2007-10-11 Seiko Epson Corp ノズル形成基板の製造方法及びノズル形成基板
JP2013099880A (ja) * 2011-11-08 2013-05-23 Fujifilm Corp 液滴吐出ヘッドの製造方法
JP2013233726A (ja) * 2012-05-09 2013-11-21 Konica Minolta Inc インクジェット記録ヘッドの製造方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2983679B2 (ja) * 1990-04-30 1999-11-29 ゼロックス コーポレイション 塗被方法
US6315393B1 (en) * 1999-04-30 2001-11-13 Hewlett-Packard Company Ink-jet printhead
JP2003182072A (ja) * 2001-12-17 2003-07-03 Matsushita Electric Ind Co Ltd インクジェットヘッド及びインクジェット式記録装置
JP2004122384A (ja) * 2002-09-30 2004-04-22 Sharp Corp ノズルプレートの製造方法およびインクジェットヘッド
JP2004276568A (ja) * 2003-03-19 2004-10-07 Fuji Xerox Co Ltd インクジェット記録ヘッド
JP2006346965A (ja) * 2005-06-15 2006-12-28 Seiko Epson Corp 液体噴射ヘッド
JP2007119657A (ja) * 2005-10-31 2007-05-17 Seiko Epson Corp インクジェット捺染用インク組成物、これを用いた捺染方法、及び捺染物
JP2007261070A (ja) * 2006-03-28 2007-10-11 Seiko Epson Corp ノズル形成基板の製造方法及びノズル形成基板
JP2013099880A (ja) * 2011-11-08 2013-05-23 Fujifilm Corp 液滴吐出ヘッドの製造方法
JP2013233726A (ja) * 2012-05-09 2013-11-21 Konica Minolta Inc インクジェット記録ヘッドの製造方法

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