CN110475670A - Ink-jet recording apparatus - Google Patents
Ink-jet recording apparatus Download PDFInfo
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- CN110475670A CN110475670A CN201880022996.2A CN201880022996A CN110475670A CN 110475670 A CN110475670 A CN 110475670A CN 201880022996 A CN201880022996 A CN 201880022996A CN 110475670 A CN110475670 A CN 110475670A
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- 239000007924 injection Substances 0.000 description 9
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
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- 229920001721 polyimide Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
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- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
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- 239000004952 Polyamide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
-
- 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
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The present invention, which provides, is able to suppress the ink-jet recording apparatus that ink sprays undesirable generation.Have nozzle formation member, is provided with the nozzle bore being connected to black accumulating part；And driving portion, the driving signal that output makes pressure oscillation portion that the pressure oscillation of the black pressure oscillation in black accumulating part make to act, the sectional area of first part and second part in nozzle bore is with the increase of the distance away from black ejiction opening and monotone nondecreasing is few, and the first opening in the joint face of first part and second part with first part includes the positional relationship connection in the second opening of second part, driving signal of the driving portion supply for act on the surface of the ink in nozzle bore to the pressure oscillation that black accumulating part side more close than the second opening imports, and the opening width on any direction for passing through the center of the first opening is being set as D, in the case where being set as L along the maximum value at the distance between the edge at the edge of the first opening of the direction and the second opening, meet 0 < L≤0.25D.
Description
Technical field
The present invention relates to ink-jet recording apparatus.
Background technique
In the past, there is the pressure oscillation by making the ink in black accumulating part, from the ink for the nozzle being connected to the ink accumulating part
Ejiction opening sprays ink to recording medium, records the ink-jet recording apparatus of image on the recording medium.As ink-jet recording apparatus
In nozzle, be widely used and formed by being arranged in the nozzle formation members such as resin plate with the nozzle bore that is connected to of ink accumulating part
Nozzle.
Have following technology in the ink-jet recording apparatus using such nozzle formation member: by with nozzle bore
The distribution of sectional area on the parallel section of black ejiction opening few (broad sense of monotone nondecreasing with the increase of the distance away from black ejiction opening
On be to be increased monotonically) shape setting nozzle bore, thus inhibit Mo Congbi of the inside in nozzle bore towards black ejiction opening flowing
Face by resistance influenced, improve the ejection efficiency of ink, and spray small ink (such as patent document 1).It it is known that as follows
Such nozzle: by the way that nozzle bore is set as the first part that there is one end to form black ejiction opening and another with the first part
Hold connection second part shape, and be set as by first part and second part connection joint face in, each section with
The opening (the first opening) of first part includes such shape and position pass in the opening (the second opening) of second part
It is the structure of connection, the step difference (rack-like portion) (such as patent document 2) of rack-like is generated in above-mentioned joint face.According to such
Nozzle, though the forming position of first part and second part generate error, as long as the error be rack-like portion width in,
It will not be affected to the shape of first part, so the shape being able to suppress due to first part is generated from setting originally
The difference of meter and generate the curved undesirable condition of black emission direction.
Patent document 1: Japanese Unexamined Patent Publication 2003-237067 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2002-240294 bulletin
However, if the width in rack-like portion, i.e., between the edge of the first opening and the edge of the second opening along above-mentioned company
The distance of junction is excessive relative to the size of the opening width of the first opening, then surface (the curved liquid of the ink in the inside of nozzle bore
Face) it is directed to than the second opening in the case where the black accumulating part side, along with the retrogressing on the surface of the ink, enter nozzle
The air of the inside in hole is brought into ink as bubble.If in the presence of in the inside of nozzle bore bubble be brought into ink,
The pressure of ink in black accumulating part then will not be suitably transferred to the ink of the inside of nozzle bore, spray ink amount, ink so generating
The exception of emission direction causes ink to spray this bad project.
Summary of the invention
Being designed to provide for the invention is able to suppress the ink-jet recording apparatus that ink sprays undesirable generation.
To achieve the goals above, the invention of ink-jet recording apparatus described in technical solution 1 has:
Black accumulating part, stockpiles ink；
Nozzle formation member is provided with the nozzle bore being connected to above-mentioned black accumulating part；
Pressure oscillation portion carries out the pressure oscillation for making the ink in above-mentioned black accumulating part according to the driving signal inputted
Pressure oscillation movement；And
Driving portion passes through the above-mentioned driving signal that the output of above-mentioned pressure oscillation portion carries out above-mentioned pressure oscillation movement
Above-mentioned pressure oscillation movement sprays the ink in above-mentioned black accumulating part from the black ejiction opening in said nozzle hole,
Said nozzle hole is formed the first part of above-mentioned black ejiction opening by one end and is connected with the other end of above-mentioned first part
The second part connect is constituted,
Above-mentioned first part and above-mentioned second part connect into and nozzle face is parallel formed by above-mentioned black ejiction opening cuts open
The distribution of sectional area on face have with the increase of the distance away from above-mentioned black ejiction opening and the few shape of monotone nondecreasing and along
The nozzle axis direction vertical with said nozzle face extends and on the joint face with above-mentioned first part and above-mentioned second part
Above-mentioned first part the first opening include second of above-mentioned second part on above-mentioned joint face be open in shape with
And positional relationship,
The above-mentioned driving signal that above-mentioned driving portion supply carries out above-mentioned pressure oscillation movement, it is dynamic by above-mentioned pressure oscillation
Work is by the surface of the ink in the inside in said nozzle hole to above-mentioned ink more close than above-mentioned second opening in said nozzle axis direction
Accumulating part side imports,
The center of above-mentioned first opening will passed through and be open along above-mentioned first on any direction of above-mentioned joint face
Opening width be set as D, will along the direction of the opening width it is above-mentioned first opening edge and it is above-mentioned second opening side
In the case that the maximum value of the distance between edge is set as L, meet 0 < L≤0.25D.
Invention described in technical solution 2 is in the ink-jet recording apparatus described in technical solution 1,
Above-mentioned D and above-mentioned L meets 0 < L < 0.15D.
Invention described in technical solution 3 is in the ink-jet recording apparatus described in technical solution 1 or 2,
Above-mentioned first part and above-mentioned second part the center by above-mentioned black ejiction opening and with said nozzle axis side
Inner wall and said nozzle axis side on parallel arbitrary section with the above-mentioned second part in said nozzle forming member
Inner wall of the minimum value of angulation greater than the above-mentioned first part in said nozzle forming member and above-mentioned spray between
The shape of the maximum value of angulation between mouth axis direction.
Invention described in technical solution 4 is in the ink-jet recording apparatus described in any one in technical solution 1~3,
Above-mentioned first part includes
Front part, one end form above-mentioned black ejiction opening, and the inner wall in said nozzle forming member is from above-mentioned black ejiction opening
It is extended parallel to said nozzle axis direction；And
Rear part extends to above-mentioned first opening from the other end of above-mentioned front part, and above-mentioned sectional area is with away from above-mentioned
The increase of the distance of black ejiction opening and be increased monotonically.
Invention described in technical solution 5 is in the ink-jet recording apparatus described in technical solution 4,
The length of above-mentioned front part in said nozzle axis direction is by the center of above-mentioned black ejiction opening and along above-mentioned
0.3 times or less of the opening width of above-mentioned black ejiction opening on any direction of nozzle face.
Invention described in technical solution 6 is in the ink-jet recording apparatus described in any one in technical solution 1~5,
The length of above-mentioned first part in said nozzle axis direction is by the center of above-mentioned black ejiction opening and along upper
1.5 times or less for stating the opening width of the above-mentioned black ejiction opening on any direction of nozzle face.
Invention described in technical solution 7 is in the ink-jet recording apparatus described in any one in technical solution 1~6,
Said nozzle forming member is made of single component.
According to the present invention, it is able to suppress ink and sprays effect as undesirable generation.
Detailed description of the invention
Fig. 1 is the figure for indicating the schematic construction of ink-jet recording apparatus.
Fig. 2 is the figure for indicating the internal structure of head unit.
Fig. 3 is the exploded perspective view for indicating the structure of record head.
Fig. 4 is the block diagram for indicating the major function of ink-jet recording apparatus and constituting.
Fig. 5 A be indicate to be set to the figure of the structure of nozzle bore of nozzle plate, and be nozzle plate XZ plane in section view
Figure.
Fig. 5 B is the top view of the first opening and the second opening from Z-direction.
Fig. 6 is the chart for indicating the curved inhibitory effect by ink injection angle brought by setting rack-like portion.
Fig. 7 A has been expressed as black spray action and the figure of the example of driving signal that is supplied to.
Fig. 7 B has been expressed as black spray action and the figure of the example of driving signal that is supplied to.
Fig. 8 A is the schematic sectional view being illustrated to the movement of record head corresponding with the input of driving signal.
Fig. 8 B is the schematic sectional view being illustrated to the movement of record head corresponding with the input of driving signal.
Fig. 8 C is the schematic sectional view being illustrated to the movement of record head corresponding with the input of driving signal.
Fig. 9 is to indicate to be directed to the figure being open than second close to the meniscus of the ink of pressure chamber side.
Figure 10 is the figure for indicating the result for the simulation for confirming the effect of embodiment.
Figure 11 A is the schematic diagram for indicating to be involved in the form of bubble in ink in nozzle bore.
Figure 11 B is the schematic diagram for indicating to be involved in the form of bubble in ink in nozzle bore.
Figure 11 C is the schematic diagram for indicating to be involved in the form of bubble in ink in nozzle bore.
Figure 12 is the figure being illustrated to the forming method of nozzle bore.
Figure 13 is the figure for indicating the structure of nozzle bore involved in variation.
Specific embodiment
Hereinafter, being illustrated based on attached drawing to embodiment involved in ink-jet recording apparatus of the invention.
Fig. 1 is the figure for indicating the schematic construction of the ink-jet recording apparatus 1 as embodiments of the present invention.
Ink-jet recording apparatus 1 has delivery section 10 and head unit 20 etc..
Delivery section 10 has driven roller 101 to rotate centered on the rotary shaft that the X-direction of Fig. 1 extends and driven
The conveyer belt 103 of the colyliform of the bearing of roller 102 inside.Delivery section 10 is situated between by being placed with record on the conveyor surface of conveyer belt 103
In the state of matter P, driven roller 101 is rotated according to the movement of the conveying motor of diagram omission, and conveyer belt 103 surround movement, by
This is by recording medium P along the moving direction (conveying direction of conveyer belt 103；The Y-direction of Fig. 1) it is conveyed.
As recording medium P, it can be set to the sheet elements such as paper, resin.Recording medium P is supplied by the paper feed that diagram is omitted
It is given on conveyer belt 103, sprays ink from head unit 20 and record and be discharged to defined paper discharge unit from conveyer belt 103 after image.
Head unit 20 to the recording medium P conveyed by delivery section 10, based on image data timing appropriate spray ink come
Record image.In the ink-jet recording apparatus 1 of present embodiment, with yellow (Y), magenta (M), cyan (C), black (K) this
Corresponding four head units 20 of ink of four colors are arranged as since the conveying direction upstream side of recording medium P successively
It is arranged at a prescribed interval by the sequence of the color of Y, M, C, K.In addition, the quantity of head unit 20 be also possible to three or less or
Five or more.
Fig. 2 is the figure for indicating the internal structure of head unit 20.Fig. 2 indicates the feelings of the head unit 20 from 103 side of conveyer belt
Structure under condition.
Head unit 20 has multiple record heads 30, and oriented and conveyer belt is respectively set in each of multiple record heads 30
103 opposed black discharging surfaces spray multiple nozzle bores 40 (nozzle) of ink.In each record head 30, multiple nozzle bores 40 are along X
2 column are lined up in direction, constitute two nozzle rows, the two nozzle rows are to mutually stagger the configuration space of nozzle bore 40 about X-direction
Half state configuration.In addition, in head unit 20, the respectively combination two of record head 30 constitutes head module 30M, the head
Module 30M is aligned to staggered-mesh shape.In each head module 30M, two record heads 30 are alternately being configured about X-direction
Record head 30 is configured under the positional relationship of nozzle bore 40.The configuration of record head 30 in this way, the spray that head unit 20 is included
The region of image is capable of forming in the recording medium P that the configuration range covering of nozzle aperture 40 in the X direction is conveyed by conveyer belt 103
The width (width being able to record) of X-direction.The fixed position when recording image of head unit 20 is come using according to recording medium P
Conveying, the different positions of conveying direction at a prescribed interval (conveying direction interval) successively spray ink, thus with one way
Mode records image.
Fig. 3 is the exploded perspective view for indicating the structure of record head 30.In addition, in Fig. 3, by the nozzle rows in record head 30
Quantity save slightly one column, the quantity of nozzle bore 40 is in addition saved slightly 7 to describe.
There is record head 30 ink to spray substrate 31, which sprays substrate 31 and be formed with multiple (ink of pressure chamber 38 for stockpiling ink
Accumulating part).The end face bonding that ink sprays substrate 31 is provided with the nozzle plate 33 of multiple nozzle bores 40.Nozzle bore 40 and ink spray
The pressure chamber 38 of substrate 31 is connected to, and sprays the ink stockpiled in pressure chamber 38.The top of 33 side of nozzle plate of substrate 31 is sprayed in ink
Cover board 32 is installed.
As nozzle plate 33, the material that can be easy through laser ablation can be used, such as polyimides, poly- to benzene two
The resin substrates such as formic acid glycol ester, polyamide, polysulfones.In the present embodiment, using the spray being made of polyimide substrate
Mouth plate 33.
Ink sprays the construction that there is substrate 31 two pieces of substrates 34,35 to be mutually bonded via adhesive portion 36.Substrate 34,35 is by zirconium
The piezoelectric materials such as lead titanates (PZT) are constituted, and are polarized to mutual opposite direction in a thickness direction.Ink spray substrate 31 on
The state for being spaced from each other equal interval is formed with multiple pressure chambers 38, is formed between each pressure chamber 38 and is made of piezoelectric material
Next door 37 (piezoelectric element).Side wall (surface in next door 37) in each pressure chamber 38 is provided with electrode 371 (Fig. 8 A~Fig. 8 C),
Next door 37 is bent (shearing change according to the voltage between the electrode 371 for being applied to adjacent pressure chamber 38 centered on adhesive portion 36
Shape).For record head 30, if from the beginning driving portion 39 (Fig. 4) inputs the voltage signal of defined drive waveforms to electrode 371
(hereinafter, being denoted as driving signal), then next door 37 is shear-deformable according to the variation of the driving voltage in the driving signal, thus exists
Pressure change is generated in pressure chamber 38, sprays ink from nozzle bore 40.In this way, the record head 30 of present embodiment be have by
Apply electric field and shearing (shared) stress that generates on the direction orthogonal with the polarization direction of piezoelectric element and from 40 row of nozzle bore
The ink gun of the black emitting mechanism of shear mode (shared model) out of ink.In the present embodiment, in record head 30, by setting
The next door 37 for being equipped with electrode 371 constitutes pressure oscillation portion, the shear-deformable and pressure oscillation in next door 37 corresponding with driving signal
Movement corresponds to.
In addition, the structure of the black emitting mechanism in record head 30 is not limited to above-mentioned shared model.For example, can use
The black emitting mechanism of beam mode caused by the vibration of thin membrane of the wall surface of the pressure chamber of piezoelectricity is used, by adding to ink
Heat come generate bubble to spray ink mode black emitting mechanism.
Fig. 4 is the block diagram for indicating the main function of ink-jet recording apparatus 1 and constituting.
Ink-jet recording apparatus 1 has the control unit 50, head unit 20 with head control unit 301 and head driving portion 39, defeated
Send driving portion 61, input/output interface 62 and bus 63 etc..
Control unit 50 has CPU51 (Central Processing Unit: central processing unit), RAM52 (Random
Access Memory: random access memory), ROM53 (Read Only Memory: read-only memory) and storage unit 54.
CPU51 reads the program for the various controls for being stored in ROM53, sets data and it is made to be stored in RAM52, executes
The program carries out various calculation process.In addition, CPU51 is uniformly controlled the molar behavior of ink-jet recording apparatus 1.
RAM52 provides the storage space of work, temporary storing data to CPU51.RAM52 also may include non-volatile
Property memory.
ROM53 stores program, the setting data etc. by the CPU51 various controls executed.In addition it is also possible to instead of
ROM53 and use EEPROM (Electrically Erasable Programmable Read Only Memory: electrically erasable
Programmable read only memory), flash memory etc. be able to carry out the nonvolatile memory of rewriting.
Print out task (the image note inputted via input/output interface 62 from external device (ED) 2 is stored in storage unit 54
Record order) and the print out task involved in image data etc..As storage unit 54, such as use HDD (Hard Disk
Drive: hard disk drive), alternatively, it is also possible to and with DRAM, (Dynamic Random Access Memory: dynamic random is deposited
Access to memory) etc..
Head control unit 301 is in timing appropriate corresponding with the control signal from control unit 50, to being set to record head
30 head driving portion 39 exports various control signals, image data.Herein, control signal include from the beginning driving portion 39 to above-mentioned
The signal of drive waveforms involved in the specified driving signal that next door 37 in black emitting mechanism supplies.
Head driving portion 39 passes through the control signal inputted according to from the beginning control unit 301, image data and records to being set to
The electrode 371 in first 30 next door 37 supplies driving signal, to spray ink from nozzle bore 40.Specifically, head driving portion 39 has
There is the Wave data storage unit for the drive waveforms data for being stored with multiple driving signals, according to the control from head control unit 301
Signal and image data supply driving signal to the electrode in next door 37 from multiple drive waveforms one drive waveforms of selection
371。
Feed drive portion 61 based on from the control signal that control unit 50 supplies to conveying motor (not shown) supply driving letter
So that driven roller 101 is carried out spinning movement, makes conveyer belt 103 with defined speed ring around movement as a result,.
Input/output interface 62 propagates the transmitting and receiving of the data between external device (ED) 2 and control unit 50.Input
Output interface 62 is for example made of any one or the their combination in various serial line interfaces, various parallel interfaces.
Bus 63 is the path for carrying out the transmitting and receiving of signal between control unit 50 and other compositions.
External device (ED) 2 is, for example, personal computer, via input/output interface 62 by print out task and image data etc.
It supplies to control unit 50.
Next, being illustrated in detail to the structure of the nozzle bore 40 in record head 30.
Fig. 5 A and Fig. 5 B are the figures for indicating to be set to the structure of nozzle bore 40 of nozzle plate 33.
Fig. 5 A is the cross-sectional view in the XZ plane of nozzle plate 33.As shown in Figure 5A, nozzle bore 40 is by being set to by single
The through hole for the nozzle plate 33 that component (polyimide substrate) is constituted is constituted.The end of the lower section of nozzle bore 40 in Fig. 5 A is ink
The end of ejiction opening 40a, top are connected to pressure chamber 38.Nozzle bore 40 along with face formed by black ejiction opening 40a (hereinafter, being denoted as
Nozzle face) vertical Z-direction (nozzle axis direction) extends.
Nozzle bore 40 is in the section (that is, section vertical with Z-direction) parallel with nozzle face formed by black ejiction opening 40a
Sectional area distribution with the increase of the distance away from black ejiction opening 40a the side of monotone nondecreasing few (broadly be increased monotonically)
Formula, that is, with there is no sectional area with the increase of the distance away from black ejiction opening 40a and reduction place shape setting.In addition,
Nozzle bore 40 forms the first part 41 of black ejiction opening 40a and with the other end of first part 41 (with black ejiction opening by one end
The end of the side 40a opposite side) connection second part 42 constitute.In the present embodiment, nozzle plate 33 with a thickness of 200 [μ
M], the diameter d of black ejiction opening 40a is 20 [μm].Additionally, it is preferred that the length A of first part 41 in z-direction is set as black ejiction opening
In 1.5 times or less of the range of the diameter d of 40a, the length A of present embodiment is 15 [μm].
Herein, in the regulation of the above-mentioned length A other than black ejiction opening 40a is circle, instead of diameter d, and
Use the minimum value of the opening width of the area center of gravity (center) by black ejiction opening 40a.That is, length A is set as spraying by ink
It exports the area center of gravity of 40a and 1.5 times along the opening width of the black ejiction opening 40a on any direction of nozzle face is below
In range.
In addition, in fig. 5, in order to be readily apparent that the shape of first part 41, and reduce describe second part 42 (and
Nozzle plate 33) length in z-direction.
First part 41 has in nozzle plate 33 in the center by black ejiction opening 40a and the plane parallel with Z-direction
The first part 41 inner wall and Z-direction between be at an angle of θ 1 cone-shaped.In addition, second part 42 is sprayed by ink
Inner wall and Z-direction in the center of mouthful 40a and the plane parallel with Z-direction with the second part 42 in nozzle plate 33 it
Between at be greater than angle, θ 1 angle, θ 2 cone-shaped.That is, the cone-shaped that second part 42 has inclination angle bigger than first part 41.
In the present embodiment, angle, θ 1 is about 4 degree, and angle, θ 2 is about 36 degree.The angle of inner wall in XZ plane is shown in fig. 5
Degree, but on the center by black ejiction opening 40a and any other section parallel with Z-direction, second part 42, which also has, to incline
The oblique angle cone-shaped bigger than first part 41.
First part 41 and second part 42 connect in the joint face S parallel with nozzle face.In addition, first part 41
And it includes the in joint face S that second part 42, which connects into the first opening 41a with the first part 41 in joint face S,
Shape and positional relationship in the range of second opening 42a of two parts 42.As a result, in joint face S, the rank of rack-like is formed
Terraced difference is formed rack-like portion T (platform part) is arranged.
Fig. 5 B is the top view of the first opening 41a and the second opening 42a from Z-direction.As shown in Figure 5 B, it first opens
The edge of mouth 41a is rounded, and the edge of the second opening 42a is in four circular squares of vertex band.These first openings 41a's
Region between edge and the edge of the second opening 42a constitutes rack-like portion T.The rack-like portion T is in the face of joint face S, because
This, it is parallel with nozzle face.
Hereinafter, by by the center of the first opening 41a and along the opening of the first opening 41a on the direction of joint face S
Width (in the present embodiment, diameter of a circle formed by the first opening 41a) is set as D (hereinafter, also referred to as opening width D), will
The distance between edge of 42a is open most along the edge of the above-mentioned first opening 41a in the direction of the opening width and second
Big value is set as L (the hereinafter, also referred to as width L of rack-like portion T).
The nozzle bore 40 of present embodiment is by setting rack-like portion T, thus in first part 41 and second part 42
In the case that forming position generates error, it is difficult to be affected to the shape of first part 41.That is, if first part 41 and
Opposite positional offset amount of the second part 42 in X/Y plane is in the width of rack-like portion T, although then the shape of rack-like portion T becomes
It is dynamic, but since the first opening 41a maintains to include the state in the second opening 42a in joint face S, so first will not be given
41 shape itself is divided to affect.In this way, being difficult to change by the shape of first part 41, thus, it is possible to be difficult to generate generation
The angle of emergence for the ink that slave nozzle bore 40 in the case where the deviation of the forming position of first part 41 and second part 42 sprays
The bending of degree.
Fig. 6 is the chart for indicating the curved inhibitory effect of ink injection angle brought by setting rack-like portion T.
The case where curve C1, C2, C3 in Fig. 6 are illustrated respectively in nozzle bore 40, not set rack-like portion T, setting width L
The case where for 2 [μm], impartial rack-like portion T and setting width L be 6 [μm], equalization rack-like portion T the case where each situation
Under, the amount of bow of black injection angle is relative to first part 41 and the opposite positional offset amount of second part 42.
As shown in the curve C1 of Fig. 6, in the case where not set rack-like portion T, the amount of bow of black injection angle is according to first
Part 41 and the opposite position of second part 42, which are deviateed, to be radically increased.This is due to the not set rack-like portion T the case where
Under, deviate if generating position between first part 41 and second part 42, in the connection of first part 41 and second part 42
Face is tilted relative to nozzle face, so the direction including ink inflow in first part 41 is the ingredient other than Z-direction.
On the other hand, as shown in curve C2, C3 of Fig. 6, in the case where rack-like portion T is arranged, the bending of black injection angle
It measures and is significantly reduced relative to the opposite positional offset amount of first part 41 and second part 42.This is because as above-mentioned
Like that, the position between first part 41 and second part 42 is deviateed is absorbed by the variation of the shape of rack-like portion T, and joint face S holds
Easily maintain the state parallel relative to nozzle face.More increase the width L of rack-like portion T, then the curved reduction effect of black injection angle
Fruit is bigger.
Next, the ink to the record head 30 corresponding with driving signal in the ink-jet recording apparatus 1 of present embodiment sprays
The black movement in the nozzle bore 40 in movement and the ink spray action is illustrated out.
Fig. 7 A and Fig. 7 B have been expressed as black spray action respectively and from the beginning driving portion 39 is supplied to the electrode 371 in next door 37
The figure of the example for the driving signal given.
In addition, Fig. 8 A, Fig. 8 B and Fig. 8 C are said to the movement of record head 30 corresponding with the input of driving signal
Bright schematic sectional view, and indicate the section of the record head 30 in the plane parallel with nozzle plate 33.In Fig. 8 A, Fig. 8 B and figure
In 8C, three adjacent pressure chamber 38A~38C are depicted, hereinafter, to the situation for wherein spraying ink from the pressure chamber 38B in center
Under movement be illustrated.Fig. 8 A shows the neutral condition that each electrode 371A, 371B, 371C are set as earthing potential.
Driving signal shown in Fig. 7 A has the expansion pulse p1 for the voltage V1 being applied from time t0 to time t1.This
Place, the application time (t1-t0) of expansion pulse p1 are set as the intrinsic vibration number pair with the acoustics of the pressure wave in pressure chamber 38
The 1/2 of the harmonic period answered.
If starting supply of the driving signal of Fig. 7 A to electrode 371, according to the application of expansion pulse p1, such as Fig. 8 B institute
Show, to electrode 371B service voltage V1, so that electrode 371A, 371C is become earthing potential, thus clip the next door 37 of pressure chamber 38B
It is shear-deformable, the cubical expansion of pressure chamber 38B.The pressure of the ink in pressure chamber 38 is reduced as a result,.Moreover, if in time t1, it is swollen
The application of swollen pulse p1 terminates, and each electrode 371A, 371B, 371C become earthing potential, then is Fig. 8 A from the state transition of Fig. 8 B
State, the pressure of the thus volume contraction of pressure chamber 38, the ink in pressure chamber 38 increases.By the pressure of the ink from nozzle bore
40 black ejiction opening 40a sprays ink.
In this way, increase again after reducing the pressure of the ink in pressure chamber 38 by the driving signal according to Fig. 7 A
Next door 37 a series of movement (pressure oscillation movement), thus from nozzle bore 40 spray pressure chamber 38 in ink.
In addition, expansion arteries and veins of the driving signal shown in Fig. 7 B by the above-mentioned voltage V1 being applied from time t0 to time t1
The contraction pulse p2 for rushing the p1 and voltage-V2 from time t1 to time t2 being applied is constituted.Herein, the application of pulse p2 is shunk
Time (t2-t1) is 2 times of the application time of expansion pulse p1, in addition, the absolute value of voltage-V2 is the absolute value of voltage V1
1/2.
If the driving signal of Fig. 7 B is supplied to next door 37, as shown in Figure 8 B, volume root of the next door 37 in pressure chamber 38
The side expanded according to the rising of expansion pulse p1 is upwardly-deformed, and the pressure of the ink in pressure chamber 38 is reduced.Moreover, if starting to shrink
The application of pulse p2 then as shown in Figure 8 C to electrode 371B service voltage-V2, makes electrode 371A, 371C become earthing potential,
Thus the next door 37 for clipping pressure chamber 38B is shear-deformable, and the volume of pressure chamber 38B is further shunk from the neutral condition of Fig. 8 A.
The pressure of the ink in pressure chamber 38 increases as a result, sprays ink from the black ejiction opening 40a of nozzle bore 40 by the pressure of the ink.
In this way, by also increase again after reducing the pressure of the ink in pressure chamber 38 according to the driving signal of Fig. 7 B
Next door 37 a series of movement (pressure oscillation movement), thus the ink in pressure chamber 38 is sprayed from nozzle bore 40.
More specifically, if the pressure oscillation for starting next door 37 by the driving signal for applying Fig. 7 A or Fig. 7 B is dynamic
Make, then first with the application because of expansion pulse p1 caused by pressure chamber 38 in ink pressure reduction correspondingly, nozzle bore
The surface (meniscus) of ink in 40 is imported to 38 side of pressure chamber and is retreated.Moreover, if due in the driving signal of Fig. 7 A
The application of expansion pulse p1 terminates, and the application that pulse p2 is in addition shunk in the driving signal of Fig. 7 B starts, and in pressure chamber 38
Ink pressure increase, then and correspondingly, in nozzle bore 40 ink meniscus pushed away about Z-direction to the side black ejiction opening 40a
Out, a part of ink is dripped as black liquid and is sprayed from black ejiction opening 40a.In addition, the movement of the meniscus of ink is not necessarily and drives
Synchronous movement during the application of pulse in dynamic signal, can also be according to the flowing with the ink generated before pulse applies
Pressure distribution in corresponding inertia, nozzle bore 40 etc. is also moved before and after each pulse application in z-direction.
Herein, in the ink-jet recording apparatus of present embodiment 1, the one of the meniscus of the ink in above-mentioned black spray action
In serial movement, the position of meniscus in z-direction when which is imported to 38 side of pressure chamber is backed to than second
Divide the second opening 42a in 42 close to 38 side of pressure chamber.In other words, it will be acted according to the pressure oscillation in next door 37, by nozzle bore
The meniscus of ink in 40 imports such driving signal to 38 side of pressure chamber more close than the second opening 42a in z-direction and uses
It is sprayed in ink.
Fig. 9 is the figure for indicating to be directed to than the second opening 42a close to the meniscus M of the black In of 38 side of pressure chamber.
If meniscus M may since the meniscus M of ink In is directed to than the second opening 42a close to 38 side of pressure chamber
Existing range is expanded to the inside of second part 42, then meniscus M is easy extension.Therefore, if not to entering second part
The meniscus M of 42 inside applies the pressure of the meniscus M ink appropriate rolled back to the direction black ejiction opening 40a, then curved
Liquid level M enters dearly in second part 42.As a result, meniscus M is involved in bubble, the inside that the bubble is brought into black In is generated
Undesirable condition.If bubble is brought into the inside of black In, the pressure of the ink in pressure chamber 38 can not be suitably transmitted to spray
Black In in nozzle aperture 40 causes ink to spray bad so generating the exception for spraying ink amount, black emission direction.
In contrast, in the nozzle bore of present embodiment 40, the opening width D and frame of the first above-mentioned opening 41a
The width L of shape portion T forms nozzle bore 40 in a manner of meeting formula below (1), to inhibit undesirable condition as described above
It generates.
0 < L≤0.25D ... (1)
For example, the opening width D of the first opening 41a on direction parallel with X-direction shown in Fig. 5 A is 21 [μm], the
The opening width W of two opening 42a is 25 [μm], and the width L of rack-like portion T in this direction is 2 [μm].In addition, not having in fig. 5
It shows, but any direction about the center by the first opening 41a, in the width L satisfaction of opening width D and rack-like portion T
State formula (1).
By limiting the upper limit of the width L of rack-like portion T as formula (1), in the inner wall for enabling to first part 41
Do not exist with the inner wall of the position of the part connecting rack-like portion T and second part 42 with the position of the part connecting rack-like portion T
It is extremely separated on the direction of joint face S.Inhibit the curved liquid that the inside of second part 42 is entered from first part 41 as a result,
The expandable range of face M sharp extends.By inhibiting the range of meniscus M expanded, thus reach coming from for meniscus M
The pressure of black In is difficult to be dispersed, and inhibits reduction of each section of meniscus M from the black In pressure being subject to.Can especially it become
As indicated by the arrows in fig. 9, it is easy to apply the meniscus M for the inside for entering second part 42 inner wall along second part 42
The state of the pressure of the black In in face.As a result inhibit meniscus M to enter second part 42 dearly and be involved in bubble, generate the bubble
The undesirable condition being brought into black In.
In addition, being met by replacing above-mentioned formula (1) with the width L of the opening width D and rack-like portion T of the first opening 41a
The mode of following formulas (2) forms nozzle bore 40, thus more reliably inhibits the generation of above-mentioned undesirable condition.
0 < L < 0.15D ... (2)
In addition, in the present embodiment, being open 41a using first in first part 41 as circular example, but first
The shape of opening 41a is without being limited thereto, such as can be ellipse, polygon (including the circular shape of vertex band) etc..First
The 41a that is open be it is round other than in the case where, above-mentioned formula (1) and D in formula (2) and L are along the face by the first opening 41a
The direction calculating of product center of gravity (center).In addition, the different situations mutual in the width of a pair of of rack-like portion T about a direction
Under, a side (maximum value) biggish in the width of a pair of rack-like portion T is set as L.
Next, being illustrated to the result of the simulation carried out to confirm the effect of present embodiment.
Figure 10 is the figure for indicating the result for the simulation for confirming the effect of present embodiment.Herein, pass through fluid simulation
To shown in Fig. 5 A, the opening width D of the first opening 41a be to make the width L of rack-like portion T from 0 in the nozzle bore 40 of 21 [μm]
The movement of [μm] to the ink that 10 [μm] divide in the nozzle bore 40 when 7 phase changes is parsed.In simulations, it is sprayed in ink
In movement, be involved in the presence or absence of when meniscus M is directed in the second part 42 of nozzle bore 40 near 38 side of pressure chamber bubble into
Parsing is gone.In Figure 10, the parsing result of bubble being involved in is indicated with "○", " △ ", "×".
Figure 11 A, Figure 11 B and Figure 11 C are the schematic diagrames for indicating to be involved in the form of bubble in ink in nozzle bore 40.
Figure 11 A shows meniscus M not bladdery the case where being involved in that black In is stably kept in second part 41
Under example.In Figure 10, the case where obtaining such parsing result is indicated with "○".
Figure 11 B shows the middle holding meniscus M in second part 41, but becomes unstable with certain probability and may produce
Anger bubble be involved in the case where example.In Figure 10, the case where obtaining such parsing result is indicated with " △ ".
Figure 11 C shows the meniscus M in second part 41 and racks (rupture) and generate example in the case where being involved in of bubble
Son.In Figure 10, the case where obtaining such parsing result is indicated with "×".
As shown in Figure 10, if the width L of rack-like portion T is super relative to the ratio (L/D) of the opening width D of the first opening 41a
0.25 is crossed, then meniscus M is racked, and generates the result ("×") of bubble being involved in.
On the other hand, understand L/D be 0.25 or less range in, the parsing result of bubble being involved in be " △ " or
"○" keeps meniscus M in second part 41, bubble can be involved in inhibition in the range of to a certain degree.
Especially in the range of L/D is less than 0.15, becomes and stably keep meniscus M in second part 41, do not produce
The result ("○") of anger bubble being involved in.
According to these as a result, meeting above-mentioned formula by the width L with the opening width D and rack-like portion T of the first opening 41a
(1) mode forms nozzle bore 40, and what the ink into nozzle bore 40 can be involved in bubble is involved in inhibition in a degree of model
In enclosing, further forming nozzle bore 40 in a manner of meeting formula (2), thus more reliably confirm to be able to suppress bubble
It is involved in.
Next, being illustrated to the forming method of nozzle bore 40.
Nozzle bore 40 with above-mentioned composition is not particularly limited, but can for example be formed by the following method.
Figure 12 is the figure being illustrated to the forming method of nozzle bore 40.
In the forming method of the nozzle bore 40 of Figure 12, firstly, by via the opening shape having with black ejiction opening 40a
The mask 70 through hole of corresponding size irradiates laser to the nozzle plate 33 being made of the polyimide substrate of thickness 200 [μm]
(herein, being excimer laser), to form the through hole (S1 of Figure 12) of perforation nozzle plate 33.As a result, in the formation of nozzle plate 33
Black ejiction opening 40a.It herein, can be by adjusting the energy density of laser, from opening the opening to outlet side of the entrance side of laser
Mouth (black ejiction opening 40a) forms the through hole with cone-shaped.
Next, will have the mask 70 through hole of size corresponding with the second opening opening shape of 42a to be configured at
Laser is irradiated to nozzle plate 33 via mask 70 in the position concentric through the opening of Kong Yumo ejiction opening 40a, and depth is arrived in perforation
185[μm].The shape of first part 41 is determined as a result, and forms rack-like portion T (S2 of Figure 12).
Later, make the area change through hole of mask 70 to the opening of 38 side of the pressure chamber of second part 42 by one side
Shape irradiates laser on one side, so that being processed as the inner wall of second part 42 becomes cone-shaped (S3 of Figure 12).
In addition, multiple masks successively different using opening shape can also be passed through in the process shown in the S3 of Figure 12
70 come irradiate laser and into a cone shape by inner wall processing.Alternatively, it is also possible to the through hole in the S1 of Figure 12 formation when, lead to
Cross the processing that method same as the S3 of Figure 12 carries out cone-shaped.In addition, forming second after forming first part 42 above-mentioned
Part 42, but can also first carry out the formation of second part 42.Can also replace the above method, and by using cone shape,
The perforation processing of the formed punch of quadrangle cone shape is respectively formed first part 41 and second part 42.
In such forming method, it is possible to create mask 70 in the S1 of Figure 12 through in the axis in hole and the S2 of Figure 12
Mask 70 the undesirable condition that deviates of the axis through hole, but the composition with rack-like portion T is set as by nozzle bore 40, even if producing
The raw axis deviates, and the joint face S of first part 41 and second part 42 is also maintained the state parallel with nozzle face, and first
The shape of part 41 is difficult to change, so being able to suppress the generation that ink projects the curved undesirable condition in direction.
In addition, as nozzle plate 33, preferably making in the case where using the black emitting mechanism of beam mode in record head 30
Use silicon substrate.Using silicon substrate, such as nozzle bore 40 can be formed by the following method.
That is, the face coating for being formed with the silicon substrate of the thickness 200 [μm] of heat oxide film in front and back sides first is photic
Resist, and photoresist figure corresponding with the opening shape of 38 side of pressure chamber of second part 42 is formed by photoetching treatment
Case.Heat oxide film is etched by using the photoresist pattern, to form the etching mask figure being made of heat oxide film
Case.Moreover, etched by anisotropy dry type silicon substrate etching into depth 185 [μm] come shape using the etching mask patterns
At second part 42.
Next, in another face painting photoresist of silicon substrate, by photoetching treatment with above-mentioned second part
The concentric position of 42 opening forms photoresist pattern corresponding with the opening shape of black ejiction opening 40a.By using this
Photoresist pattern etches heat oxide film, to form the etching mask patterns being made of heat oxide film.Moreover, using should
Etching mask patterns, until silicon substrate is etched into perforation second part 42 by the etching of anisotropy dry type, to form first
Part 41
As silicon substrate used in this method, the boundary position in first part 41 and second part 42 can be used
It is laminated with the substrate of the silicon oxide layer stopped as etching.Thereby, it is possible to accurately control the etching to form second part 42
Depth.Nozzle bore 40 is formed by wet etching alternatively, it is also possible to replace dry-etching.
(variation)
Then, the variation of above embodiment is illustrated.In this variation, the first part in nozzle bore 40
41 shape is different from the embodiment described above.Hereinafter, being illustrated to the difference with above embodiment.
Figure 13 is the figure for indicating the structure of nozzle bore 40 involved in this variation.
There is the nozzle bore 40 of this variation one end to form black ejiction opening 40a, and the inner wall in nozzle plate 33 is sprayed from ink
40 straight portion 411 (front end) that is extended parallel to Z-direction of outlet and first is extended to from the other end of straight portion 411 open
Mouthful 41a, and sectional area is increased monotonically (that is, inner wall has cone-shaped) cone with the increase of the distance away from black ejiction opening 40a
Shape portion 412 (rear end).Wherein, the inner wall of tapered portion 412 is less than the inner wall of second part 42 relative to the inclination angle of Z-direction
Inclination angle of the face relative to Z-direction.
Additionally, it is preferred that the length A1 of straight portion 411 in z-direction is set as 0.3 times or less of the diameter d of black ejiction opening 40a
In the range of, the length A1 of present embodiment is 5 [μm].
In addition, black ejiction opening 40a be it is round other than in the case where above-mentioned length A1 regulation in, instead of diameter d,
And use the minimum value for passing through the opening width of area center of gravity (defined center) of black ejiction opening 40a.That is, length A1 is set as
By the area center of gravity of black ejiction opening 40a and the opening width along the black ejiction opening 40a on any direction of nozzle face 0.3
Times or less range in.
Straight portion 411 is arranged in the front end of the side black ejiction opening 40a in first part 41 in this way, thus due to from ink
Ink before ejiction opening 40a sprays is moved along straight portion 411, so inhibiting the production of the curved undesirable condition of injection angle of ink
It is raw.
In addition, for second part 42, it is possible to have inner wall relative to Z-direction tilt angle different two with
On part structure.At this point, the minimum value that nozzle bore 40 is formed as the tilt angle of the inner wall in second part 42 is big
The maximum value of the tilt angle of inner wall in first part 41.
If above such, the ink-jet recording apparatus 1 of present embodiment has: pressure chamber 38 stockpiles ink；Nozzle plate 33,
It is provided with the nozzle bore 40 being connected to pressure chamber 38；Next door 37 make in pressure chamber 38 according to the driving signal inputted
The pressure oscillation movement of the pressure oscillation of ink；And head driving portion 39, counter septum 37 are exported for make in pressure chamber 38
The driving signal for the pressure oscillation movement that ink is discharged from the black ejiction opening 40a of nozzle bore 40, nozzle bore 40 form black spray by one end
Export 40a first part 41 and connect with the other end of first part 41 second part 42 composition, first part 41 and
The distribution for the sectional area that second part 42 connects on the section parallel with nozzle face formed by black ejiction opening 40a have with away from
The increase of the distance of black ejiction opening 40a and the few shape of monotone nondecreasing, along the Z-direction (nozzle axis direction) vertical with nozzle face
Extend, and the first opening 41a of the first part 41 in the joint face S of first part 41 and second part 42 is included in connection
Shape and positional relationship in second opening 42a of second part 42 in the S of face and form rack-like portion T, head driving portion 39 supplies
To carrying out next door 37 by the surface of the ink in the inside of nozzle bore 40 in z-direction to than the second close pressure chamber opening 42a
The driving signal for the pressure oscillation movement that 38 sides import, will pass through the center of the first opening 41a and along any of joint face S
The opening width of the first opening 41a on direction is set as the edge of D, the 41a that will be open along the first of the direction of the opening width
In the case that the maximum value at the distance between the edge of the second opening 42a is set as L, meet 0 < L≤0.25D ... (1).
The upper limit for limiting the width L of rack-like portion T in this way, enables to the first part 41 connecting with joint face S
The position of the inner wall of the position and second part 42 of inner wall does not separate extremely on the direction along joint face S.Press down as a result,
The expandable range that system enters the meniscus M of the inside of second part 42 from first part 41 sharp extends.Pass through suppression
The expandable range of meniscus M processed, the pressure from ink for reaching meniscus M are difficult to be dispersed, and are able to suppress meniscus M's
The reduction for the pressure that each portion is subject to from ink.Especially be easy to apply the meniscus M of the inside for entering second part 42 along
The pressure of the ink of the inner wall of second part 42, thus, it is possible to be easy to maintain the shape of meniscus M.As a result it is able to suppress meniscus
M enters second part 42 dearly and is involved in bubble, and the bubble is brought into the generation of the undesirable condition in ink.
In addition, being able to suppress the shape in first part 41 and second part 42 by the way that rack-like portion T is arranged in nozzle bore 40
In the case where generating error at position, the undesirable condition affected to the shape of first part 41 is generated.That is, if first
Points 41 and opposite positional offset amount of the second part 42 in X/Y plane in the range of be the width of rack-like portion T, although then
The shape of rack-like portion T changes, but the joint face S of first part 41 and second part 42 is tieed up with the state parallel with nozzle face
It holds, so will not be affected to the shape of first part 41 itself.As a result, due to be able to suppress generate first part 41 and
In the case where the deviation of the forming position of second part 42, first part 41 shape is from initial design change, so energy
It is enough difficult to generate the bending of the black injection angle from nozzle bore 40.
In addition, meeting 0 < L < 0.15D ... by the width L with the opening width D and rack-like portion T of the first opening 41a
(2) nozzle bore 40 is arranged in mode, can more reliably inhibit to be involved in the bad shape that bubble is brought into ink in nozzle bore 40
The generation of condition.
In addition, first part 41 and second part 42 are in the center by black ejiction opening 40a and times parallel with Z-direction
The minimum value of angulation is greater than between inner wall and Z-direction with the second part 42 in nozzle plate 33 on the section of meaning
The shape of the maximum value of angulation between the inner wall and Z-direction of first part 41 in nozzle plate 33.According to such
Structure can reduce the resistance (viscous drag) being subject to along the ink that Z-direction is advanced from the wall surface of nozzle bore 40 in nozzle bore 40
And efficiently spray ink.Therefore, ink ejection can be carried out by the driving signal being made of the pulse of smaller voltage amplitude to move
Make.In addition, in such a configuration, in the case where the meniscus M of ink enters the inside of second part 42 of nozzle bore 40,
Meniscus M is easy extension, but by being formed as nozzle bore 40 to meet above-mentioned formula (1) or formula (2), can be easy to remain curved
The shape of liquid level M.Thus, it is possible to effectively inhibit the generation for the undesirable condition being brought into ink.
In addition, there is the first part 41 in variation one end to form black ejiction opening 40a, and the inner wall in nozzle plate 33
The first opening is extended to from black ejiction opening 40a and the Z-direction straight portion 411 extended parallel to and from the other end of straight portion 411
41a, and the tapered portion 412 that sectional area is increased monotonically according to the increase of the distance away from black ejiction opening 40a.As a result, due to from ink
Ink before ejiction opening 40a sprays is moved along straight portion 411, so can more reliably inhibit the injection angle of ink curved
The generation of undesirable condition.
In addition, the length of the straight portion 411 in Z-direction is by the center of black ejiction opening 40a and appointing along nozzle face
The opening width of the black ejiction opening 40a to anticipate on direction (is in the above-described embodiment, 0.3 times or less of diameter d).Due to straight
Portion 411 is the narrow path with the black ejiction opening 40a same diameter being narrowly arranged to spray small black liquid drop, institute
With by the ink of straight portion 411 be easy by from wall surface by resistance influenced, but by by the length limitation of straight portion 411
In above-mentioned range, the influence of the resistance is able to suppress efficiently to spray ink.
In addition, the length of the first part 41 in Z-direction is by the center of black ejiction opening 40a and appointing along nozzle face
The opening width of the black ejiction opening 40a in the direction of meaning (is in the above-described embodiment, 1.5 times or less of diameter d).First part
41 sectional area is less than the sectional area of second part 42, by the ink of first part 41 with second part 42 compared with it is easy by from
Wall surface by resistance influenced, but by the way that the length of first part 41 to be limited in above-mentioned range, be able to suppress the resistance
The influence of power is efficiently to spray ink.
In addition, the nozzle plate 33 of present embodiment is made of single component.First will be formed with by bonding agent
In the structure that the plate for dividing 41 and the plate for being formed with second part 42 are bonded, generates bonding agent and invade the rack-like portion in nozzle bore 40
The problem of position of T, but by constituting nozzle plate 33 by single component as described above, it enables to not generate such ask
Topic.As a result it is able to suppress black spray volume under the influence of bonding agent, direction of circling in the air generates exception.
In addition, present invention is not limited to the embodiments described above and variation, it is able to carry out various changes.
For example, the driving signal being supplied to for black spray action is not limited to drive letter shown in Fig. 7 A and Fig. 7 B
Number, the variation of the black pressure in the pressure chamber 38 caused by the application because of driving signal is able to use, in nozzle bore 40
Any driving signal that the meniscus of ink is imported to 38 side of pressure chamber more close than the second opening 42a.For example, it can be multiple groups
It is combined with expansion pulse and shrinks the driving signal of at least one party of pulse.
In addition, the shape of first part 41 and second part 42 in nozzle bore 40 be not limited to the above embodiment with
And shape documented by variation.For example, the inner wall in at least one party of first part 41 and second part 42 can have
There is the rectilinear form parallel with Z-direction.In addition, inner wall in at least one party of first part 41 and second part 42 can be with
With step difference or meniscus.
In addition, in the above-described embodiment, the example of the ink-jet recording apparatus 1 of one way form is enumerated to be illustrated,
But it can also be in the ink-jet recording apparatus for the record for carrying out image while scanning record head using the present invention.
Several embodiments of the invention are described, but the scope of the present invention is not limited to above-mentioned embodiment party
Formula, the range comprising invention documented by claims and the range same with it.Industrial utilization possibility
The present invention can be used in ink-jet recording apparatus.
The explanation of appended drawing reference
1 ink-jet recording apparatus
2 external device (ED)s
10 delivery sections
101 driven rollers
102 driven vollers
103 conveyer belts
20 head units
30 record heads
30M head module
301 control units
31 ink spray substrate
32 cover boards
33 nozzle plates
34,35 substrate
36 adhesive portions
37 next doors
371,371A, 371B, 371C electrode
38, the pressure chamber 38A, 38B, 38C
39 driving portions
40 nozzles
40a ink ejiction opening
41 first parts
41a first is open
411 straight portions
412 tapered portion
42 second parts
42a second is open
50 control units
51 CPU
52 RAM
53 ROM
54 storage units
61 feed drive portions
62 input/output interfaces
63 buses
70 masks
In ink
M meniscus
P recording medium
T rack-like portion
Claims (7)
1. a kind of ink-jet recording apparatus, has:
Black accumulating part, stockpiles ink；
Nozzle formation member is provided with the nozzle bore being connected to above-mentioned black accumulating part；
Pressure oscillation portion carries out the pressure for making the pressure oscillation of the ink in above-mentioned black accumulating part according to the driving signal inputted
Variation movement；And
Driving portion, to the above-mentioned driving signal that the output of above-mentioned pressure oscillation portion carries out above-mentioned pressure oscillation movement, by above-mentioned
Pressure oscillation movement sprays the ink in above-mentioned black accumulating part from the black ejiction opening in said nozzle hole,
Said nozzle hole is formed the first part of above-mentioned black ejiction opening by one end and is connect with the other end of above-mentioned first part
Second part is constituted,
Above-mentioned first part and above-mentioned second part connect on the section parallel with nozzle face formed by above-mentioned black ejiction opening
Sectional area distribution have with the increase of the distance away from above-mentioned black ejiction opening and the few shape of monotone nondecreasing and along with it is upper
The vertical nozzle axis direction of nozzle face is stated to extend and have upper on the joint face of above-mentioned first part and above-mentioned second part
State first part the first opening include second of above-mentioned second part on above-mentioned joint face be open in shape and position
Relationship is set,
The above-mentioned driving signal that above-mentioned driving portion supply carries out above-mentioned pressure oscillation movement, being acted by above-mentioned pressure oscillation will
The surface of ink in the inside in said nozzle hole stockpiles in said nozzle axis direction to above-mentioned ink more close than above-mentioned second opening
Portion side imports,
The center of above-mentioned first opening and opening along above-mentioned first opening on any direction of above-mentioned joint face will passed through
Mouth width degree be set as D, by along the direction of the opening width it is above-mentioned first opening edge and it is above-mentioned second opening edge it
Between distance maximum value be set as L in the case where, meet 0 < L≤0.25D.
2. ink-jet recording apparatus according to claim 1, wherein
Above-mentioned D and above-mentioned L meets 0 < L < 0.15D.
3. ink-jet recording apparatus according to claim 1 or 2, wherein
Above-mentioned first part and above-mentioned second part are put down at the center by above-mentioned black ejiction opening and with said nozzle axis direction
Inner wall and said nozzle axis direction with the above-mentioned second part in said nozzle forming member on capable arbitrary section it
Between angulation minimum value be greater than said nozzle forming member in above-mentioned first part inner wall and said nozzle axis
The shape of the maximum value of angulation between direction.
4. ink-jet recording apparatus according to any one of claims 1 to 3, wherein
Above-mentioned first part includes
Front part, one end form above-mentioned black ejiction opening, the inner wall in said nozzle forming member from above-mentioned black ejiction opening with it is upper
Nozzle axis direction is stated to extend parallel to；And
Rear part extends to above-mentioned first opening from the other end of above-mentioned front part, and above-mentioned sectional area is sprayed with away from above-mentioned ink
The increase of the distance of outlet and be increased monotonically.
5. ink-jet recording apparatus according to claim 4, wherein
The length of above-mentioned front part in said nozzle axis direction is by the center of above-mentioned black ejiction opening and along said nozzle
0.3 times or less of the opening width of above-mentioned black ejiction opening on any direction in face.
6. ink-jet recording apparatus according to any one of claims 1 to 5, wherein
The length of above-mentioned first part in said nozzle axis direction is by the center of above-mentioned black ejiction opening and along above-mentioned spray
1.5 times or less of the opening width of above-mentioned black ejiction opening on any direction in mouth face.
7. ink-jet recording apparatus according to any one of claims 1 to 6, wherein
Said nozzle forming member is made of single component.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017071993 | 2017-03-31 | ||
| JP2017-071993 | 2017-03-31 | ||
| PCT/JP2018/001719 WO2018179706A1 (en) | 2017-03-31 | 2018-01-22 | Ink jet recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110475670A true CN110475670A (en) | 2019-11-19 |
Family
ID=63674726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880022996.2A Pending CN110475670A (en) | 2017-03-31 | 2018-01-22 | Ink-jet recording apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7020480B2 (en) |
| CN (1) | CN110475670A (en) |
| WO (1) | WO2018179706A1 (en) |
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|---|---|---|---|---|
| JP3862624B2 (en) * | 2002-07-10 | 2006-12-27 | キヤノン株式会社 | Liquid discharge head and method for manufacturing the head |
| JP2010110969A (en) * | 2008-11-05 | 2010-05-20 | Seiko Epson Corp | Liquid ejecting head and liquid ejecting apparatus |
| JP5428970B2 (en) * | 2009-07-13 | 2014-02-26 | セイコーエプソン株式会社 | Liquid ejection apparatus and liquid ejection method |
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2018
- 2018-01-22 WO PCT/JP2018/001719 patent/WO2018179706A1/en active Application Filing
- 2018-01-22 CN CN201880022996.2A patent/CN110475670A/en active Pending
- 2018-01-22 JP JP2019508606A patent/JP7020480B2/en active Active
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|---|---|---|---|---|
| JPH05293960A (en) * | 1992-04-20 | 1993-11-09 | Brother Ind Ltd | Ink jet printing head |
| JP2002113529A (en) * | 2000-10-04 | 2002-04-16 | Matsushita Electric Ind Co Ltd | Manufacturing method of plate, ink jet head using plate manufactured by the manufacturing method and ink jet type recorder |
| JP2002240294A (en) * | 2001-02-21 | 2002-08-28 | Ricoh Co Ltd | Liquid drop discharge head, its manufacturing method and ink jet recorder |
| JP2003237067A (en) * | 2002-02-14 | 2003-08-26 | Matsushita Electric Ind Co Ltd | Inkjet head and recorder |
| US20110050804A1 (en) * | 2009-09-03 | 2011-03-03 | Seiko Epson Corporation | Liquid ejecting head and method of manufacturing the same |
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| CN107405922A (en) * | 2015-03-24 | 2017-11-28 | 锡克拜控股有限公司 | The manufacture method of ink jet-print head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7020480B2 (en) | 2022-02-16 |
| JPWO2018179706A1 (en) | 2020-02-06 |
| WO2018179706A1 (en) | 2018-10-04 |
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Application publication date: 20191119 |