CN102303456B - Liquid discharging apparatus and method of discharging liquid - Google Patents
Liquid discharging apparatus and method of discharging liquid Download PDFInfo
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- CN102303456B CN102303456B CN201110227881.7A CN201110227881A CN102303456B CN 102303456 B CN102303456 B CN 102303456B CN 201110227881 A CN201110227881 A CN 201110227881A CN 102303456 B CN102303456 B CN 102303456B
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Abstract
The present invention provides a liquid discharging apparatus, which discharges liquid from at least one nozzle on the basis of data, and includes a controller. When the controller (60) is in a standby state and no liquid is being discharged from the nozzle on the basis of the data, the controller (60) performs a drawing operation wherein the liquid is drawn into the nozzle in a direction that is opposite to the direction that the ink is discharged from the nozzle in order to form a space (SP2) at a distal end portion of the at least one nozzle where no liquid is present. Thereby, the viscidity increase of the liquid at the front end of the nozzle at the standby state can be restrained at a condition without the cap component.
Description
The divisional application that the application's application number that to be on June 30th, 2008 propose to China national Patent Office is 200810125279.0, denomination of invention is " liquid ejection apparatus and liquid ejection method " this application.
Technical field
The present invention relates to a kind of liquid ejection apparatus and liquid ejection method.
Background technology
As one of liquid ejection apparatus, be known to ink-jet printer.This ink-jet printer is used for to the various media such as paper or cloth, film, and multiple nozzles ejections from the beginning, as the ink of liquid, print.
Here, when the opening of these nozzles is during by atmosphere opening, at the leading section of nozzle, solvent in ink is that moisture can evaporate, result, be accompanied by the process of time, the solids ratios such as solute ratio or pigment such as the dyestuff in ink will improve relatively, and the ink of described leading section likely viscosity increases (viscosity raising).And this viscosity increase not only brings harmful effect to the spray volume of ink droplet and drippage position, and if excessively, can cause spray nozzle clogging.
Therefore, while not printing during general disconnection (OFF) state of the power supply at printer or printing holding state etc. are long, cover the forming surface of the nozzle in head with cap (cap) member, prevent that near viscosity ink surface from increasing.
As this cap member, for example can use the casing of approximate cuboid, that is, what be made up of 5 portions of facing the wall and meditating that are removed with the wall portion of a described opposed side in its wall portion of 6 has a under casing body.And, in the time that this cap member is pushed down, become the wall portion of 4 of cap member and the forming surface butt of nozzle, and and the front-end edge of nozzle between there is the state in gap, thus, can covering nozzles, cover (with reference to patent documentation 1) from surrounding space.
[patent documentation 1] Japanese Patent Laid-Open 2004-230832 communique
, recently in order to shorten the time-write interval, developing the wardrobe printer (line head printer) of the nozzle rows (nozzle is arranged along a direction) of length more than a kind of width that is provided with the media such as paper in head.And, according to this wardrobe printer, can be omitted in common serial printer the action that moves back and forth of head in necessary printing,, be fixed at head under the state of assigned position, by the medium ejection ink to this conveying, can be to medium printing image, as a result, can seek the high speed of printing.
; the in the situation that of wardrobe printer; because the total length of the nozzle rows of head is elongated; so; must need the total length of the cap member that covers this nozzle rows also elongated; but the described cap member that has a under casing body shape is increased, to be formed in the problem (flatten etc.) of technical existence many, wish to omit cap member.
Summary of the invention
The present invention proposes in view of described problem, and its object is, realizes a kind ofly in the case of the cap member that does not use covering nozzles, can suppress to print liquid ejection apparatus and liquid ejection method that the viscosity of the liquid of spray nozzle front end portion under holding state increases.
Be a kind of liquid ejection apparatus for the main invention that realizes described object, spray liquid according to data from nozzle, it is characterized in that, comprising:
In the time not carrying out the holding state of ejection of the liquid from described nozzle based on described data, according to the mode that at least forms space at the leading section of described nozzle, the controller that carries out the action that described liquid is entered to a layback contrary to emission direction.
According to the record of this description and accompanying drawing, can understand other features of the present invention.
Accompanying drawing explanation
Fig. 1 is the key diagram of the surface structure of print system 100.
Fig. 2 is the key diagram of the various processing carried out of printed driver.
Fig. 3 is the block diagram of all structures of printer 1.
Fig. 4 is the profilograph of printer 1.
Fig. 5 is the key diagram of the nozzle arrangement of 41a below printhead 41.
Fig. 6 is schematic diagram from ink tank 43 grades of ink to printhead 41 that supply with.
Fig. 7 is the flow chart of print processing.
Fig. 8 A is the key diagram that near the viscosity of the ink that can produce the leading section of the nozzle of printhead 41 increases, and Fig. 8 B is that ink viscosity increase prevents the key diagram of processing, and each figure is near the amplification profile of part nozzle.
Fig. 9 A is the key diagram that ink is kept out of the way processing, and Fig. 9 B is the key diagram of ink recovery processing.
Figure 10 A and Figure 10 B are the key diagrams of pipe pump (tube pump) 72.
Figure 11 A is the key diagram of meniscus (meniscus) Is of the convex form of ink, and Figure 11 B is the key diagram of the meniscus Is of concave shape.
The flow chart of processing when Figure 12 is power connection and after this.
The flow chart of processing when Figure 13 is power supply releasing.
Symbol description
1-ink-jet printer; 20-supply unit; 21-paper feed roller; 22-sheet feed stacker; 23A-conveying roller; 25-platen (platen); 25a-recess; 26-ink absorption material; 27A-exit roller; 40-head unit (head unit); 41-printhead; Below 41a-; 43-ink tank; 43a-sealing bag; 45-supply pipe; 47-force (forcing) pump; 50-detector set; 53a-the first paper detection sensor; 53b-the second paper detection sensor; 60-controller; 61-interface portion; 63-memory; 64-unit control circuit; 65-timer; 66-guidance panel; 70-ink viscosity increases anti-stop element; 72-pipe pump; 73-shell (case); 73a-internal face; 74-rotating circular disk; 74a-outer peripheral face; 75-pressure roller; 77-bypass pipe; 78-by-passing valve; 80-wiping (wiper) member; 100-print system; 110-computer; 120-display unit; 130-input unit; 140-record regenerator; 411-nozzle rows; Ne-nozzle opening; Is-ink surface; Ise-outer peripheral edges; SP1-space; SP2-space; SP3-recess; The C74-center of circle; Wc-Breadth Maximum; A-prescribed limit; P-nozzle interval.
The specific embodiment
According to the record of this description and accompanying drawing, at least can understand following item.
The present invention relates to a kind of liquid ejection apparatus, spray liquid according to data from nozzle, it is characterized in that, comprising:
In the time not carrying out the holding state of ejection of the liquid from described nozzle based on described data, at least form and carry out spatially the controller to the action of drawing in emission direction opposition side by described liquid at the leading section of described nozzle.
According to this liquid ejection apparatus, can be in the situation that not using cap member, the viscosity that suppresses the liquid of the leading section of nozzle under described holding state increases.Described in it be the reasons are as follows.Under holding state, because liquid is pulled to a side contrary to emission direction, so, the liquid level of the liquid in nozzle from the space in the outside of nozzle away from, be difficult to touch the wind producing in the space in this outside.As a result, can suppress the evaporation from the moisture of liquid level, thereby suppress the viscosity increase of liquid.In addition, by described draw in action formed space at the leading section of nozzle, this space is enclosed by the internal perisporium bread of nozzle, becomes air and moves few so-called stagnation point.Therefore, due to the delay of the air of this stagnation point, also can realize the space moisturizing of this stagnation point, result, can suppress from the evaporation of the liquid level of the liquid in nozzle, thereby the viscosity that can suppress liquid increases.
This liquid ejection apparatus, in the time of described holding state, according to the mode that only forms space at the leading section of described nozzle, is carried out the action that described liquid is entered to a layback contrary to emission direction by described controller.
According to such liquid ejection apparatus, because forming, a leading section at described nozzle draws in spatially described liquid, so, can carry out at short notice the operation for returning to the state that can spray liquid.
For this liquid ejection apparatus, described liquid is supplied with to described nozzle by stream from the container of storing this liquid, and is provided with pump in described stream;
Described controller has timer;
Described draw in action after, after the stipulated time of being counted by described timer, the whole liquid that exist in described nozzle and described stream are received in described container by described blowback.
According to such liquid ejection apparatus, in the time that holding state is long, the whole liquids recovery that exist in described nozzle and described stream are arrived in described container.Therefore, can reliably suppress holding state longer, the viscosity of the liquid more easily causing increases.
For this liquid ejection apparatus, when described holding state, be to have received after power supply open command.
According to such liquid ejection apparatus, can not use under the state of cap member, the viscosity that suppresses the liquid of the leading section of nozzle under power-off state increases.It is the reasons are as follows.Under power-off state, because liquid is pulled to a side contrary to emission direction, so, the liquid level of the liquid in nozzle from the space in the outside of nozzle away from, be difficult to touch the wind producing in the space in this outside.As a result, the evaporation from the moisture of liquid level can be suppressed, thereby the viscosity increase of liquid can be suppressed.In addition, draw in action by above-mentioned, formed space at the leading section of nozzle, this space is enclosed by the internal perisporium bread of nozzle, becomes air and moves few so-called stagnation point.Therefore, due to the delay of the air of this stagnation point, also can realize the space moisturizing of this stagnation point, result, can suppress from the evaporation of the liquid level of the liquid in nozzle, and the viscosity that can suppress liquid increases.
For this liquid ejection apparatus, described liquid is supplied with to described nozzle by stream from the container of storing this liquid, and is provided with pump in described stream;
Having received after described power supply open command, the whole liquid that exist in described nozzle and described stream are received in described container by described blowback.
According to such liquid ejection apparatus, under power-off state, the whole liquids recovery that exist in described nozzle and described stream are arrived in described container.Therefore, can effectively suppress the viscosity increase of liquid under power-off state.
This liquid ejection apparatus has: at the conveying mechanism of throughput direction pumped (conveying) medium be disposed with the head of multiple described nozzles along the direction of intersecting with described throughput direction;
Utilizing described conveying mechanism to carry in the process of described medium, from the described nozzle of described of mobile halted state to described medium ejection liquid.
According to such liquid ejection apparatus, can be in the situation that not using cap member, the action effect that performance can suppress the viscosity increase of the liquid of the leading section of nozzle under holding state effectively., described head is the wardrobe that use in so-called wardrobe printer, in the time being these wardrobe, for by cap member covering nozzles, need long cap member, it is formed in manufacturing technology and is difficult to realize, but here owing to can omit cap member in these wardrobe, so can avoid the problem in manufacturing technology.
For this liquid ejection apparatus, described liquid is ink.Here, ink comprises water-base ink, oily ink.
In addition, the invention still further relates to a kind of liquid ejection method, it is characterized in that, comprising: according to data, from the step of nozzle ejection liquid; With
In the time not carrying out the holding state of ejection of the liquid from described nozzle based on described data, according to the mode that at least forms space at the leading section of described nozzle, the step that described liquid is entered to a layback contrary to emission direction.
According to such liquid ejection method, can be in the situation that not using cap member, the viscosity that suppresses the liquid of the leading section of the nozzle of described holding state increases.
The structure of===print system 100===
With reference to accompanying drawing, an embodiment of the print system 100 of the liquid ejection apparatus that has used present embodiment is described.
Fig. 1 is the key diagram that represents the surface structure of print system 100.This print system 100 has: as printer 1, computer 110, display unit 120, input unit 130, the record regenerator 140 of liquid ejection apparatus.Printer 1 is to the medium such as paper or cloth ejection ink droplet, the ink-jet printer of print image.Computer 110 can be connected communicatedly with printer 1, in order to make printer 1 print image, to the printer 1 output print data corresponding with the image of printing.
In computer 110, printed driver is installed.Printed driver is to be transformed to the program of print data from the view data of application program output.
Fig. 2 is the key diagram of the various processing carried out of printed driver.Printed driver is obtained view data from application program, is transformed to the print data of the form that printer 1 can explain, and print data is exported to printer 1.In the view data while being transformed to print data of self-application program in future, printed driver carries out the resolution conversion processing shown in Fig. 2, look conversion process, halftoning (half-tone) to be processed.
In processing, resolution conversion in (S110), will be transformed to the print resolution (for example 1600dpi × 1600dpi) in the time that paper is printed from the view data (text data or view data etc.) of application program output.Wherein, each pixel data of resolution conversion view data after treatment is the RGB data of many gray scales (for example 256 gray scales) of being showed by RGB color space.
In look conversion process (S120), reference colored conversion look-up table, is the cmyk data being showed by CMYK color space by described RGB data transformation.Wherein, the pixel data after look conversion process is the cmyk data of 256 gray scales that showed by CMYK color space.
In halftone process (S130), be the data of printer 1 few grey that can form by the data transformation of high grey.View data after halftone process, print data has the resolution ratio for example, with above-mentioned print resolution (1600dpi × 1600dpi) equal.In view data (print data) after halftone process, for example, pixel data is set up to corresponding relation by the pixel of the image that should print, and pixel data becomes the data of the formation situation (having or not or size etc. of point) that represents the point in each pixel.
The print data generating through above resolution conversion processing, look conversion process, halftone process, is sent to printer 1 by printer driver.
The formation of===printer 1===
" formation of ink-jet printer 1 "
Fig. 3 is the block diagram of all structures of printer 1.Fig. 4 is the profilograph of printer 1.
As shown in Figure 3, printer 1 has: supply unit 20, head unit 40, ink viscosity increase anti-stop element 70, detector set 50, guidance panel 66 and controller 60.
Receive the printer 1 of print data from the computer 110 as external device (ED), control each unit (supply unit 20, head unit 40 etc.) by controller 60., controller 60, according to the print data of receiving from computer 110, is controlled each unit, print image on paper.Situation in printer 1 monitors by detector set 50, and detector set 50 is exported testing result to controller 60.Controller 60, according to the testing result of exporting from detector set 50, is controlled each unit.
< supply unit 20>
Supply unit 20 (being equivalent to conveying mechanism), for carrying paper along throughput direction, as shown in Figure 4, from the downstream of swimming over to of throughput direction, has paper feed roller 21, conveying roller 23A, platen 25, exit roller 27A in order.
Conveying roller 23A transmits the platen 25 in the principal direction throughput direction downstream receiving from paper feed roller 21.The conveying motor (not shown) that this conveying roller 23A is made up of DC motor rotarilys actuate.
< head unit 40>
< ink viscosity increases anti-stop element 70>
Ink viscosity increases anti-stop element 70 and increases near the viscosity suppressing the ink surface in the nozzle of printhead 41, has pipe pump 72 for the ink in nozzle is entered to a layback contrary to emission direction etc.To be described in the back.
< detector set 50>
In detector set 50, comprise rotary encoder (not shown), with the first paper detection sensor 53a, the second paper detection sensor 53b etc. (with reference to Fig. 4).Rotary encoder detects the rotation amount of conveying roller 23A or exit roller 27A.According to the testing result of rotary encoder, can detect the conveying capacity of paper delivery.The first paper detection sensor 53a, for detection of the position of the front end of the paper in paper supply, as shown in Figure 4, is arranged between paper feed roller 21 and conveying roller 23A.The second paper detection sensor 53b, for detection of the position of the tail end of the paper in carrying, is arranged between printhead 41 and exit roller 27A.
< guidance panel 66>
In guidance panel 66, be provided with the various action buttons such as power knob.Power knob is the ON/OFF switch of the power supply for connecting/remove printer 1.And, power knob is connected into and can be communicated by holding wire with the controller 60 of describing below, in the time pressing power knob, power turn-on signal sends to controller 60, while pressing power knob once again, power supply open command sends to controller 60, is receiving after this power supply open command, and controller 60 is removed the power supply of printer 1.
< controller 60>
< printhead 41>
Fig. 5 is the Pareto diagram of the nozzle that 41a arranges below printhead 41.41a below printhead 41, by black (K), bluish-green (C), fuchsin (M), yellow (Y) each color, be spaced from each other interval and dispose abreast the nozzle rows 411 being formed by multiple nozzle # 1～#n respectively at throughput direction.
Each nozzle # 1～#n of each nozzle rows 411 along with the straight line of the orthogonal paper width of the throughput direction of paper on, with the nozzle interval P configuration stipulating.This nozzle interval P decides according to the maximum of the print resolution of described paper width, and for example, in the time that maximum is 1600dpi, nozzle interval P is 1/1600 (inch).In addition, the total length L of the paper width of each nozzle rows 411 is longer than the Breadth Maximum Wc of the paper width of paper, and thus, this printhead 41 is as so-called wardrobe (line head) performance function.That is, in print processing, printhead 41 is fixed under the state of assigned position, just, by the paper ejection ink droplet towards transporting from the upstream of throughput direction, prints.
In each nozzle # 1～#n, as for ink being become to the driving element that drips shape and spray, be provided with piezoelectric element (not shown).If piezoelectric element is being arranged at the voltage that applies the stipulated time between the electrode at its two ends, can uphold according to the action time of voltage, make the sidewall distortion of the stream of ink.Thus, the volume of the stream of ink shrinks according to the flexible of piezoelectric element, and the ink that is equivalent to this amount of contraction becomes ink droplet, is sprayed by the nozzle # 1～#n from of all kinds.Can, according to each pixel data of print data, carry out the driving of each piezoelectric element.
To the providing ink of printhead 41, undertaken by the ink tank 43 being configured in printer 1.That is, as shown in the schematic diagram of Fig. 6, head unit 40 has by the ink tank of the ink reservoir of all kinds of CMYK 43, respectively by supply pipe 45 (being equivalent to stream), supplies with the ink of corresponding color from each ink tank 43 to the each nozzle in printhead 41.Particularly, in printhead 41, form the stream of the ink being communicated with each nozzle by each ink look, and connect respectively described supply pipe 45 at the end of ink tank 43 sides of each stream, thus, the ink in ink tank 43 can be supplied with to printhead 41.
By the way, in order to carry out reliably the supply of ink, the pressurized supply of ink in ink tank 43.That is, in each ink tank 43, corresponding ink is contained with the form of the sealing bag 43a that accommodates this ink, and the air pressure of the surrounding space of described sealing bag 43a in described ink tank 43, and pressurized pump 47 pressurizes.Therefore,, by this air pressure conquassation sealing bag 43a gently, thus, the form extruding to described supply pipe 45 with the ink in sealing bag 43a, supplies with ink to printhead 41.Wherein, the pump 72 shown in Fig. 6 and valve 78 are to increase to ink viscosity the equipment that anti-stop element 70 is relevant, will be described in the back.
===print processing===
Fig. 7 is the flow chart of print processing.Wherein, according to the program of memory 63 interior storages, control each unit by controller 60, carry out these actions.This program has the code for carrying out each action.
If controller 60 is received the print command sending from computer 110, carry out print processing.For example the head (head) of the print data sending from computer 110, comprise this print command.Then, controller 60 is analyzed the content of the various command comprising in the print data receiving, and uses each unit, carries out following paper supply action, carries action, ink spray action, ADF action etc.
At first, controller 60 carries out paper supply action (S202).Paper supply action is the action that the front end of the paper that print is transported to the printing initiating position of the regulation in printer 1.That is, controller 60 drives paper feeding motor, and the paper feed roller 21 of Fig. 4 is rotated, and the paper of sheet feed stacker 22 is transported to conveying roller 23A, then, drive and carry motor, make conveying roller 23A rotation, by the paper downstream transport of sending here from paper feed roller 21, if its front end arrives described printing initiating position, stop.This printing initiating position is for example between printhead 41 and conveying roller 23A, and with not opposed positions of any nozzle of printhead 41.Wherein, can, according to described the first paper detection sensor 53a, detect the arrival of this printing initiating position.
Then, controller 60 starts to carry action (S204).Carrying action is to drive to carry motor, the action of paper being carried to the downstream of throughput direction with the transporting velocity of regulation by conveying roller 23A.And, can, in this conveying action, carry out spraying from printhead 41 the ink spray action (S206) of ink droplet.
In this ink spray action, according to print data, spray intermittently ink droplet from the nozzle of each nozzle rows 411, result is arranged and is formed multiple points along throughput direction on paper, and at paper width, forms point with the nozzle interval P of each nozzle rows 411.Wherein, if there is no other data of printing on should the paper in printing, finish this ink spray action.
Then, if the tail end of paper arrives than the more ADF starting position in downstream of printhead 41, finish to carry action (S208), carry out ADF action (S210).ADF action is by being transferred motor-driven exit roller 27A, and with the action of the speed downstream transport paper higher than the transporting velocity of described conveying action, thus, paper is discharged at a high speed outside printer 1.Wherein, the tail end of paper arrives described ADF starting position and is detected by described the second paper detection sensor 53b.
Afterwards, controller 60 judges whether to proceed print processing (S212).Then, if ensuing paper is printed, turn back to described step S202, start the paper supply action (S202) of ensuing paper, if ensuing paper is not printed, finish print processing.Wherein, for example can, according to whether remain the data that print in described print data, carry out above-mentioned judgement.
For ink viscosity, increase prevents from processing in======
The increase of < ink viscosity prevents from processing >
Fig. 8 A is the key diagram that near the viscosity of the ink that can produce the leading section of the nozzle of printhead 41 increases, and is near the amplification profilograph of part nozzle.
Under the printing holding state or power-off state of not carrying out above-mentioned print processing, in general stream in printhead 41, be filled with ink, become the meniscus Is of the end of the ink of its ejection side, arrive the edge foremost of nozzle, i.e. nozzle opening Ne.Therefore, the ink surface Is of this meniscus is always in being exposed to the state of atmosphere, thereby, solvent in ink, moisture easily evaporates from ink surface Is, as a result, be accompanied by the process of time, near nozzle opening Ne, the solids ratios such as solute ratio or pigment such as the dyestuff in ink improve relatively, and near the ink viscosity of described nozzle opening Ne is likely increased.And this viscosity increase not only spray volume to ink droplet or drippage position brings harmful effect, and if excessively, will cause spray nozzle clogging.
For this reason, in this printer 1, in order to prevent that such viscosity from increasing, under described printing holding state or power-off state, according to the mode that at least forms space S P2 at the leading section of nozzle, described ink is pulled to emission direction opposition side (following, also referred to as regurgitating outgoing direction or regurgitating out side), thus, prevent that the viscosity of the ink of the leading section of nozzle from increasing (with reference to Fig. 8 B).
Wherein, if so at least form space S P2 at the leading section of nozzle, can suppress that the viscosity of ink increases the reasons are as follows described in.As shown in Figure 8 A, in the time not drawing in ink, ink surface Is is positioned at nozzle opening Ne.That is, ink surface Is is positioned at nozzle opening Ne in its outer peripheral edges Ise, and the central side of ink surface Is than described nozzle opening Ne to regurgitating out the caved in state of meniscus part of side.Therefore, this ink surface Is easily touches the wind of blowing in the space S P1 below printhead 41, result, and near ink ink surface Is, by this wind, is compared evaporation simply.
In contrast, as shown in Figure 8 B, if by ink is pulled to and regurgitates out side, from nozzle opening Ne to the space S P2 that regurgitates out side formation ormal weight, can make ink surface Is away from described wind, make described wind be difficult to touch ink surface Is.Thus, the moisture evaporation from ink surface Is can be suppressed, the increase of the viscosity of ink can be suppressed.And, drawing in based on described, the space S P2 in the nozzle that relies on the formation of ejection side than ink surface Is, is enclosed by the internal perisporium bread in this nozzle, becomes air and moves few so-called stagnation point.Therefore, the delay of the air based on this stagnation point, makes the space S P1 of the comparable printhead of space S P2 41 belows of this stagnation point keep higher humidity, and result has effectively suppressed from the evaporation of the ink surface Is in nozzle, and the viscosity that can effectively suppress ink increases.
Here, forming space S P2 at the leading section of nozzle, is beyond the recess S P3 of the meniscus of ink, forms in addition space S P2.Therefore, in the time forming this space S P2, the outer peripheral edges Ise of ink surface Is is positioned at than nozzle opening Ne and more relies on and regurgitate out side, and in other words, ink surface Is spreads all over its whole, is positioned at than nozzle opening Ne and relies on the position of regurgitating out side.
Prevent the kind of processing as the ink viscosity increase of this conception of species, can list " ink is kept out of the way processing " and " ink recovery processing " these 2 kinds.
The former ink is kept out of the way processing as shown in Figure 9 A, be on one side to make ink surface Is be positioned at nozzle, on one side by ink to the processing of regurgitating out layback and entering.Here, nozzle refers to along the normal direction of the opening surface of nozzle opening Ne, be formed as continuously the part of the straight tube-like stream that there is no bend and same shape from this nozzle opening Ne, refer to than described piezoelectric element more by spraying the part (with reference to Fig. 9 A) of side.And, keep out of the way processing according to this ink, because the position of the ink surface Is after drawing in is received in nozzle, so can make ink surface Is get back at once the position of nozzle opening Ne, that is, nozzle can be returned at once to the state of printable processing.Therefore, this ink is kept out of the way to process and is suitable for the short time and does not carry out the situation of print processing, in this printer 1, can under the printing holding state of short-term relatively, carry out.
On the other hand, the latter's ink recovery is processed as shown in Figure 9 B, be will be in the stream of printhead 41 and supply pipe 45 interior existence almost all ink recovery in ink tank 43, thus, make in the stream of printhead 41 and almost become empty processing in supply pipe 45.And, according to this ink recovery processing, can, by the sealing bag 43a in ink tank 43, prevent to longer-term black evaporation of water, result, can keep out of the way processing longer-term than above-mentioned ink and prevent that the viscosity of ink from increasing.
; due in the time having carried out this ink recovery processing; need to before print processing, the ink in ink tank 43 be recharged to (with reference to Fig. 6) to printhead 41; so; instantaneity viewpoint from energy instantaneous recovery to the state that can print, it is excellent that above-mentioned ink is kept out of the way processing.Therefore, this ink recovery processing is suitable for not carrying out for a long time the situation of print processing, in printer 1, can under the printing holding state of power-off state or longer-term, carry out.
< ink viscosity increases anti-stop element 70>
Controlling ink viscosity by controller 60 increases anti-stop element 70, carries out such ink viscosity increase and prevents from processing.Ink viscosity increases anti-stop element 70 as shown in Fig. 7 and Fig. 9 B, has in the described supply pipe 45 that the ink of ink tank 43 is supplied with to printhead 41 the pipe pump 72 that arranges, by-passing valve 78 for the bypass pipe 77 of roundabout this pipe pump 72 and the stream of this bypass pipe 77 of switch.Wherein, this ink viscosity increases anti-stop element 70 by each ink look setting of CMYK, that is, arrange with respect to each supply pipe 45 of the ink of CMYK.
Figure 10 A and Figure 10 B are the key diagrams of pipe pump 72, have represented its part with analysing and observe.Pipe pump 72 is smoothed out with the fingers the established part A of (ご く) supply pipe 45, the direction ink delivery of smoothing out with the fingers repeatedly.Particularly, this pipe pump 72 as shown in Figure 10 A, there is shell 73, be contained in shell 73 and can around the rotating circular disk 74 of center of circle C74 rotation, from the lateral surface of rotating circular disk 74 to foreign side outstanding and can rotate freely a pair of pressure roller 75 that point symmetry arranges each other and rotarily actuate the not shown drive motors of rotating circular disk 74, and described supply pipe 45 is configured between the internal face 73a of shell 73 and the outer peripheral face 74a of rotating circular disk 74.Therefore, if rotating circular disk 74 is rotated by described drive motors, can be smoothed out with the fingers by the internal face 73a of pressure roller 75 and shell 73 in supply pipe 45 and the part of pressure roller 75 butts, thus, ink is moved in this direction of smoothing out with the fingers, and after smoothing out with the fingers, this part of being smoothed out with the fingers and be out of shape is by the flexible own recuperability based on supply pipe 45, can get back to the original state of heaving, at this moment, can draw and rise the ink existing in the opposition side of the direction of smoothing out with the fingers.Therefore,, by making rotating circular disk 74 to a direction rotation, the ink in supply pipe 45 can be carried to the direction along direction of rotation.Certainly during by pipe pump 72 ink delivery, by-passing valve 78 yes closed condition.
Increase anti-stop element 70 according to such ink viscosity, can keep out of the way processing and ink recovery processing by carrying out like that below described ink.
Keep out of the way in processing at ink, as shown in Figure 9 A, due to according to the position of ink surface Is is received in to the degree in nozzle, ink is entered to regurgitating out layback on a small quantity, so as shown in Figure 10 B, rotating circular disk 74 rotates and described a small amount of corresponding anglec of rotation (for example 10 °) to regurgitating outgoing direction, and stops under this state.
So, smooth out with the fingers supply pipe 45 according to the girth amount corresponding with this anglec of rotation, thus, can be to regurgitating outgoing direction ink delivery, then, because the part of being smoothed out with the fingers of supply pipe 45 is passed through the flexible own recuperability based on self, can recover to the original state of heaving from the state of distortion, thus the attraction of regurgitating outgoing direction in the interior generation of supply pipe 45, thus, the ink of the leading section of nozzle is drawn into, and the position that reaches ink surface Is is received into the degree in nozzle.And, by not making rotating circular disk 74 rotate, maintain this halted state afterwards, thereby maintain the position of drawing in of described ink surface Is.
In addition, in the time of print processing, as shown in Figure 8 A, need to make the position of ink surface Is turn back to nozzle opening Ne (front-end edge of nozzle), can be by opening the by-passing valve 78 of Figure 10 B, carry out this and return to processing (following, to be called ink reset processing).That is, if open by-passing valve 78, the ink of ink tank 43 will not pass through pipe pump 72, and carry to nozzle side by bypass pipe 77, and thus, ink surface Is resets to the position of nozzle opening Ne.Then, in print processing, this by-passing valve 78 is maintaining open mode, and thus, ink can be provided for printhead 41 by bypass pipe 77.
And in ink recovery is processed, as described in Fig. 9 B, due to by the stream of printhead 41 and whole ink transport of supply pipe 45 interior existence, be recovered to ink tank 43, so, the rotating circular disk 74 of Figure 10 A is with rotating speed corresponding to amount with described whole inks that should reclaim, along regurgitating outgoing direction continuous rotation, then stop.So, during this continuous rotation, repeatedly smooth out with the fingers successively the prescribed limit A of supply pipe 45 by a pair of pressure roller 75, and repeating all to make distortion turn back to the action of heaving by own restoring force in the time being smoothed out with the fingers, thus, finally make almost to become in the stream of printhead 41 and in supply pipe 45 empty.
In addition, while printing after this ink recovery is processed, also need to make the position of ink surface Is to turn back to nozzle opening Ne, can be by making rotating circular disk 74 to direction rotation contrary to the above, realize this processing of returning (following, to be called ink Recovery processing)., if make rotating circular disk 74 to emission direction rotation, according to pump principle similar to the above, ink in ink tank 43 is supplied to pipe 45 and attracts, in the stream of printhead 41, guide, final, in supply pipe 45 and in the stream of printhead 41, until the nozzle opening Ne of the end of ejection side, be full of by ink, then, become the state that a small amount of ink drips from nozzle opening Ne, if become like this, make rotating circular disk 74 stop.
; at this moment nozzle opening Ne does not form the meniscus of concave shape; usually become the meniscus Is of the convex form shown in Figure 11 A, if but be not the meniscus Is of the concave shape shown in Figure 11 B, in print processing, cannot carry out normal ink spray action. hereinTherefore,, as the final work of this ink Recovery processing, can carry out wiping processing.,, by the Wiping member 80 shown in Fig. 7, the forming surface of the nozzle of 41a, thus, makes the meniscus of nozzle opening Ne become the concave shape shown in Figure 11 B below wiping printhead 41.Wiping member 80 is elastic plates that carpet veneer and rubber layer are pasted together.And this Wiping member 80 as shown in Figure 6B, is configured in the below of printhead 41, be also provided with by not shown guide rail and move for coming and going in the guiding of paper width, and for making Wiping member 80 come and go mobile driving mechanism (not shown).Therefore, if direction the opposing party's for the position of readiness that Wiping member 80 is set from the two ends at paper width position of readiness moves, in moving process, the nozzle forming surface butt of 41a below the upper ora terminalis of Wiping member 80 and printhead 41, the nozzle of this nozzle forming surface of wiping, thus, can make the meniscus of nozzle opening Ne become concave shape.
< ink is kept out of the way the enforcement timing > of processing and ink recovery processing
Figure 12 and Figure 13 are that ink is kept out of the way and processed and the key diagram of an example of the enforcement timing of ink recovery processing, are the flow charts from the power connection of printer 1 to a series of processing of power supply releasing.The flow chart of processing when Figure 12 is power connection and afterwards, the flow chart of processing when Figure 13 is power supply releasing.Wherein, read the program corresponding with these handling processes by the CPU62 of controller 60 from memory 63, according to each unit described in this programme-control etc., carry out these handling processes.
If user presses power knob, printer 1 is switched on power.Then, follow in this, if controller 60 receives the power turn-on signal sending from guidance panel 66, controller 60 just starts the handling process of Figure 12, according to this handling process, controls each unit.In addition, continue to carry out the handling process of this Figure 12, until interrupt processing the handling process of Figure 13 based on power supply open command.
As shown in figure 12, if receive power turn-on signal, first controller 60 carries out " ink Recovery processing " (S302) as ink ejection preparation, and thus, the ink of ink tank 43 is filled into the nozzle opening Ne (with reference to Fig. 6) of printhead 41.Wherein, the reason of carrying out ink Recovery processing in this timing is, in the time that power supply disconnects as described later, to carry out described " ink recovery processing ", thus, can make to become the dummy status (with reference to Fig. 9 B) that ink exits in the stream of printhead 41 and in supply pipe 45.
Then, controller 60 increases for the viscosity that prevents the ink causing because of the printing holding state of short-term, and transfers to step S304, carry out " ink is kept out of the way processing ", thus, be converged in the scope in nozzle in the position of ink surface Is, ink is entered to regurgitating out layback.Then, transfer to step S306, after timer 65 is resetted, start the counting of timer 65.
This timer 65 is in the long situation of printing holding state, even for keep out of the way the timer 65 of processing to stopping for a long time the ink recovery processing switching that also can prevent viscosity increase from the ink of current state.Therefore, in following step S308, controller 60 is by the count value T of the current time of being counted by timer 65 and set binding hours Tth comparison, in the time exceeding binding hours, transfer to the ink recovery processing of step S316, in the time being no more than, transfer to step S310, determine whether and receive the print command relevant with unenforced print processing.
Then, when the judgement of step S310 is, while not receiving the judgement of described print command, to turn back to described step S308, repeat the comparison of above-mentioned count value T, on the other hand, in the time being the judgement of having received described print command, transfer to following step S312.Then, in this step S312, carry out " ink reset processing ", thus, return to nozzle opening Ne by being pulled to the ink surface Is that regurgitates out side, become the state (with reference to Fig. 8 A) that can spray ink droplet.
Then, transfer to step S314, carry out nozzle rinse (flushing).Nozzle rinse is similarly to drive piezoelectric element with the ink spray action of common print processing, and from the processing of nozzle ejection ink droplet, thus, the ink surface Is in nozzle is cleaned the state for not having viscosity to increase.The ink droplet spraying based on nozzle rinse, the ink absorption material 26 arranging in the recess 25a above of platen 25 as shown in Figure 4 receives, keeps.In addition,, in the time of this nozzle rinse, yes carries out the driving of piezoelectric element according to set signal, rather than carries out according to print data.
Then, carry out " print processing " (S322) according to the print data corresponding with described print command.Owing to describing in Fig. 8 for this print processing, so description thereof is omitted here.Then, if this print processing finishes, for corresponding with printing holding state, turn back to above-mentioned step S304, carry out " ink is kept out of the way processing ", then, through starting etc. of the timer 65 of above-mentioned step S306, standby in step S310, until receive the print command relevant with unenforced print processing, or in step S308, count value T exceedes binding hours Tth.
In addition, when in the step S308 of this printing holding state, when the count value T of timer 65 has exceeded described binding hours Tth, controller 60 makes to process to step S316 and shifts, and carries out " ink recovery processing ".Then, whole inks in the stream of this printhead 41 and in supply pipe 45 are recycled to (with reference to Fig. 9 B) standby under the state in ink tank 43, until receive the print command relevant with unenforced print processing, if received this print command (S318), carry out step S320 " ink Recovery processing ", thus, in the stream of printhead 41 etc., become the state (with reference to Fig. 6) that is filled ink, afterwards, transfer to step S322, carry out " print processing ".Then, if print processing finishes,, for the viscosity of processing the ink causing because of printing holding state increases, turn back to above-mentioned step S304, carry out " ink is kept out of the way processing ", repeat the later processing of above-mentioned step S306.
And in the time removing the power supply of printer 1, user's power knob of push panel 66 once again, follows in this, sends power supply open command from guidance panel 66.Then,, if receive this power supply open command, controller 60 starts the handling process of Figure 13.
That is, first controller 60 determines whether it is in print processing (S402), being the timing standby of sentencing in print processing, until print processing finishes.Then, if print processing finishes, the handling process of Figure 12 is interrupted processing, that is, shift to the step S404 of Figure 13, carry out " ink recovery processing ".Thus, the whole inks in the stream of printhead 41 and in supply pipe 45 are recycled to ink tank 43 (with reference to Fig. 9 B), do not print even if become for a long time, also can prevent the state of the viscosity increase of ink.Then, controller 60 is removed the power supply (S406) of printer 1.
===other embodiment===
In the above-described embodiment, mainly record print system 100, but wherein certainly comprised the description of liquid ejection apparatus and liquid ejection method etc.And above-mentioned embodiment is used for making understanding of the present invention to become easily, not limited interpretation the present invention.The present invention, not departing under the prerequisite of its aim, can change, improve, and the present invention comprises its equivalent.Even embodiment described below, is also contained in the present invention.
In the above-described embodiment, as liquid ejection apparatus, enumerate ink-jet printer 1, sprayed or the liquid ejection apparatus of other liquid beyond ink of ejection (being dispersed with the such fluid of the aqueous body of particle of functional material or gel etc.) but also can be embodied as.For example, can be ejection comprise liquid crystal display, EL (electroluminescent) display and face active display with the form dispersing or dissolving manufacture etc. in the liquid ejection apparatus of aqueous body of the material such as electrode material or color material that used; The organic liquid ejection apparatus of organism that the manufacture of ejection biochip is used; With the liquid ejection apparatus that uses, sprays the liquid that becomes test portion as accurate pipette.And then, can be also in the precision optical machinery such as wrist-watch or camera accurately the liquid ejection apparatus of ejection lubricating oil, in order to form the small packaged lens (optical lens) that uses in optical communication device etc. etc. to spraying the liquid ejection apparatus of the transparent resin liquid such as ultraviolet hardening resin on substrate, for etch substrate etc. and the liquid ejection apparatus of the etching solutions such as ejection acid or alkali and the fluid blowout unit of ejection gel.And, the present invention can be applied in any one blowoff wherein.
In the above-described embodiment, having enumerated wardrobe printer, but be not limited to this as printer 1, for example, can be also serial printer.; can be to have there is along the first direction alignment arrangements stipulating the printhead of multiple nozzles; by repeatedly carry out this printhead in the second direction of intersecting with described first direction moves from described nozzle to the medium ejection inks such as paper and the conveying action that forms the ink spray action of point and carry described medium at described first direction, the printer of print image on described medium thus.
In the above-described embodiment, as shown in figure 12, in the time printing holding state, carried out " ink is kept out of the way processing " (S304) after, after binding hours Tth, (S316) shift to " ink recovery processing ", but be not limited to this, the ink that also can not carry out S304 is kept out of the way processing, and horse back carries out S316 " ink recovery processing "., can omit the step from S304 to S314.And, can be according to the position of ink surface (meniscus) Is the mode between nozzle and ink tank 43, that is, stream or supply pipe that ink surface Is is positioned at printhead 41 45 enter ink to regurgitating out layback.
In the above-described embodiment, as shown in figure 13, in the time receiving power supply open command, carry out " ink recovery processing ", but also can replace it to carry out " ink is kept out of the way processing ".And, can be according to the position of ink surface (meniscus) Is the mode of the stream between nozzle and ink tank 43, stream or supply pipe that, ink surface Is is positioned at the printhead 41 beyond nozzle 45 enter ink to regurgitating out layback.
In the above-described embodiment, as the pump that ink viscosity is increased to anti-stop element 70 use, enumerate pipe pump 72, but if in the ejection side of supply pipe 45 with regurgitate out the pump of two direction energy ink deliveries of side, be not limited to this, for example, also can use gear pump (carrying the pump of liquid with the engagement of the gear rotating).
In the above-described embodiment, ejection mode as liquid for example understands the piezoelectric effect mode based on piezoelectric element, but being not limited to this, for example, can be also to utilize the bubble producing in this liquid to make the thermojet mode of liquid from nozzle ejection by heating liquid.
In the above-described embodiment, by force (forcing) pump 47 forced feeds the ink of ink tank 43, but according to situation, also can omit force (forcing) pump 47.For example, if compared with printhead 41, ink tank 43 is configured in to higher height, owing to can, according to this liquid level difference, supplying with ink from ink tank 43 to printhead 41, so can omit force (forcing) pump 47.
In the above-described embodiment, the starting of undeclared force (forcing) pump 47 timing and stop timing, but natural, force (forcing) pump 47 can be started by controller 60 according to power turn-on signal, is stopped by controller 60 according to power supply ON-and OFF-command.
In the above-described embodiment, do not describe ink in detail, but this ink is the aqueous body that contains solid constituents such as solute or pigment such as dyestuff etc. in the suitable solvent such as water,, can enumerate dye ink or paint ink etc. that is.
Claims (4)
1. a control method, it is the control method of following liquid ejection apparatus, this liquid ejection apparatus has: have ejection liquid nozzle fluid ejection head and supply with the stream of described liquid to described nozzle from storing the container of described liquid, spray described liquid according to data from described nozzle, this control method is characterised in that
In the situation that receiving power supply open command, carry out the liquids recovery existing in described nozzle and described stream is arrived to the recycling in described container, when having carried out while receiving power connection instruction after described power supply disconnects, the Recovery processing that liquid in described container is moved to described nozzle
In the situation that receiving power supply open command, judge whether it is to spray in the liquid ejection processing procedure of described liquid based on described data, in the situation that being judged as YES in described liquid ejection processing procedure, finishing after described liquid ejection is processed to carry out described recycling
Carrying out after described recycling, carrying out described power supply and disconnect.
2. control method according to claim 1, is characterized in that,
Described recycling is recovered to all liq existing in described nozzle and described stream in described container.
3. a liquid ejection apparatus, has: have ejection liquid nozzle fluid ejection head and supply with the stream of described liquid to described nozzle from storing the container of described liquid, spray described liquid according to data from described nozzle, it is characterized in that,
Possesses controller, described controller is in the situation that receiving power supply open command, carry out the liquids recovery existing in described nozzle and described stream is arrived to the recycling in described container, when having carried out while receiving power connection instruction after described power supply disconnects, the Recovery processing that liquid in described container is moved to described nozzle
Described controller is in the situation that receiving power supply open command, judge whether it is to spray in the liquid ejection processing procedure of described liquid based on described data, in the situation that being judged as YES in described liquid ejection processing procedure, finishing after described liquid ejection is processed to carry out described recycling
Described controller is being carried out after described recycling, carries out described power supply and disconnects.
4. liquid ejection apparatus according to claim 3, is characterized in that,
Described recycling is recovered to all liq existing in described nozzle and described stream in described container.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-174306 | 2007-07-02 | ||
| JP2007-174304 | 2007-07-02 | ||
| JP2007174306 | 2007-07-02 | ||
| JP2007174304 | 2007-07-02 | ||
| JP2008113047A JP2009029112A (en) | 2007-07-02 | 2008-04-23 | Liquid discharging apparatus and method of discharging liquid |
| JP2008-113047 | 2008-04-23 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101252790A Division CN101337462B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102303456A CN102303456A (en) | 2012-01-04 |
| CN102303456B true CN102303456B (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110227804.1A Expired - Fee Related CN102320190B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN2011102277975A Pending CN102336060A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN2011102277937A Pending CN102350876A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and liquid discharging method |
| CN2008101252790A Expired - Fee Related CN101337462B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN201110227819.8A Expired - Fee Related CN102350873B (en) | 2007-07-02 | 2008-06-30 | Liquid ejection apparatus and liquid ejection method |
| CN201110227881.7A Expired - Fee Related CN102303456B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
Family Applications Before (5)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110227804.1A Expired - Fee Related CN102320190B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN2011102277975A Pending CN102336060A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN2011102277937A Pending CN102350876A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and liquid discharging method |
| CN2008101252790A Expired - Fee Related CN101337462B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN201110227819.8A Expired - Fee Related CN102350873B (en) | 2007-07-02 | 2008-06-30 | Liquid ejection apparatus and liquid ejection method |
Country Status (2)
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| JP (2) | JP2009029112A (en) |
| CN (6) | CN102320190B (en) |
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| JP7172426B2 (en) * | 2018-03-22 | 2022-11-16 | セイコーエプソン株式会社 | Liquid injection device and method |
| CN110561915A (en) * | 2019-09-06 | 2019-12-13 | 深圳市华星光电半导体显示技术有限公司 | ink-jet printing ink box with internal circulation system |
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| CN1462240A (en) * | 2001-05-09 | 2003-12-17 | 松下电器产业株式会社 | Ink jet device, ink and method of manufacturing electronic component using the device and the ink |
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- 2008-06-30 CN CN2011102277975A patent/CN102336060A/en active Pending
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- 2008-06-30 CN CN2008101252790A patent/CN101337462B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101337462A (en) | 2009-01-07 |
| CN102320190A (en) | 2012-01-18 |
| CN102350873A (en) | 2012-02-15 |
| JP5742878B2 (en) | 2015-07-01 |
| JP2013154649A (en) | 2013-08-15 |
| CN102303456A (en) | 2012-01-04 |
| CN102350873B (en) | 2015-11-25 |
| CN102320190B (en) | 2015-05-20 |
| CN101337462B (en) | 2011-09-28 |
| CN102350876A (en) | 2012-02-15 |
| CN102336060A (en) | 2012-02-01 |
| JP2009029112A (en) | 2009-02-12 |
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