CN101337462B - Liquid discharging apparatus and method of discharging liquid - Google Patents
Liquid discharging apparatus and method of discharging liquid Download PDFInfo
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- CN101337462B CN101337462B CN2008101252790A CN200810125279A CN101337462B CN 101337462 B CN101337462 B CN 101337462B CN 2008101252790 A CN2008101252790 A CN 2008101252790A CN 200810125279 A CN200810125279 A CN 200810125279A CN 101337462 B CN101337462 B CN 101337462B
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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
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, known have an ink-jet printer.This ink-jet printer is used for to paper or various media such as cloth, film, and a plurality of nozzle ejections from the beginning print as the ink of liquid.
Here, when the opening of these nozzles during by atmosphere opening, leading section at nozzle, solvent in the ink is that moisture can evaporate, the result, be accompanied by the process of time, solids ratios such as solute ratio such as the dyestuff in the ink or pigment will improve relatively, and the ink of described leading section might viscosity increase (viscosity raising).And this viscosity increase not only brings harmful effect to the spray volume of ink droplet and drippage position, and if excessively, then can cause spray nozzle clogging.
Therefore, generally the power supply of printer disconnect (OFF) state or print holding state etc. long during when not printing, cover the formation face of the nozzle in the head with cap (cap) member, prevent that near the viscosity the ink surface from increasing.
As this cap member, for example can use the casing of approximate cuboid, that is, the under casing body arranged by what 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 constituted.And, when this cap member is pushed down, become 4 the wall portion of cap member and the formation face butt of nozzle, and and the front-end edge of nozzle between have the state in gap, thus, but covering nozzles is covered (with reference to patent documentation 1) from surrounding space.
[patent documentation 1] Japan Patent spy opens the 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 the length more than a kind of width that in head, is provided with media such as paper.And, according to this wardrobe printer, can be omitted in the common serial printer action that moves back and forth of head in the necessary printing, promptly, be fixed at head under the state of assigned position, by spraying ink to medium to this conveying, can be to the medium print image, as a result, the high speed that can seek to print.
, under the situation of wardrobe printer, because the total length of the nozzle rows of head is elongated, so, the total length of cap member that must need to cover this nozzle rows is also elongated, but the problem that will describedly have the cap member of under casing body shape to increase to be formed in technical existence (flatten etc.) many, wish omission cap member.
Summary of the invention
The present invention proposes in view of described problem, and its purpose is, realizes a kind ofly under the situation 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 the holding state increases.
Be used to realize that the main invention of described purpose is a kind of liquid ejection apparatus, spray liquid from nozzle, it is characterized in that, comprising according to data:
Do not carry out based on described data from the holding state of the ejection of the liquid of described nozzle the time, according to the mode that forms the space at least at the leading section of described nozzle, carry out the controller of action that described liquid is gone into to an opposite layback with emission direction.
According to the record of this specification and accompanying drawing, can understand other features of the present invention.
Description of drawings
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 nozzle arrangement of the following 41a of printhead 41.
Fig. 6 is a 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 the ink viscosity increase prevents the key diagram handled, and each figure is near the amplification profile of the 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 that ink recovery is handled.
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.
When Figure 12 is power connection and the flow chart of processing after this.
The flow chart of the processing when Figure 13 is the power supply releasing.
Symbol description
The 1-ink-jet printer; The 20-supply unit; The 21-paper feed roller; The 22-sheet feed stacker; The 23A-conveying roller; 25-platen (platen); The 25a-recess; The 26-ink absorption material; The 27A-exit roller; 40-head unit (head unit); The 41-printhead; Below the 41a-; The 43-ink tank; The 43a-sealing bag; The 45-supply pipe; The 47-force (forcing) pump; The 50-detector set; 53a-first paper detection sensor; 53b-second paper detection sensor; The 60-controller; The 61-interface portion; The 63-memory; 64-unit controls circuit; The 65-timer; The 66-guidance panel; The 70-ink viscosity increases anti-stop element; 72-manages pump; 73-shell (case); The 73a-internal face; The 74-rotating circular disk; The 74a-outer peripheral face; The 75-pressure roller; The 77-bypass pipe; The 78-by-passing valve; 80-wiping (wiper) member; The 100-print system; The 110-computer; The 120-display unit; The 130-input unit; The 140-record regenerator; The 411-nozzle rows; The Ne-nozzle opening; The Is-ink surface; The Ise-outer peripheral edges; The SP1-space; The SP2-space; The SP3-recess; The C74-center of circle; The Wc-Breadth Maximum; The A-prescribed limit; The P-nozzle at interval.
The specific embodiment
According to the record of this specification and accompanying drawing, can understand following item at least.
The present invention relates to a kind of liquid ejection apparatus, spray liquid from nozzle, it is characterized in that, comprising according to data:
Do not carry out based on described data from the holding state of the ejection of the liquid of described nozzle the time, form ground, space at the leading section of described nozzle at least and carry out the controller of described liquid to the action of drawing in the emission direction opposition side.
According to this liquid ejection apparatus, can be under the situation of not using the cap member, the viscosity that suppresses the liquid of the leading section of nozzle under the described holding state increases.It the reasons are as follows described.Under holding state because liquid is pulled to an opposite side with emission direction, so, the liquid level of the liquid in the nozzle from the space in the outside of nozzle away from, be difficult to touch the wind that in the space in this outside, produces.As a result, can suppress evaporation, thereby the viscosity that suppresses liquid increases from the moisture of liquid level.In addition, draw in action and formed the space at the leading section of nozzle by described, this space is enclosed by the internal perisporium bread of nozzle, becomes air and moves few so-called stagnation point.Therefore, because the delay of the air of this stagnation point can realize also preserving moisture in the space of this stagnation point, the result can suppress the evaporation of the liquid level of the liquid in the nozzle, thereby can suppress the viscosity increase of liquid.
This liquid ejection apparatus according to the mode that only forms the space at the leading section of described nozzle, is carried out the action that described liquid is gone into to an opposite layback with emission direction by described controller when described holding state.
According to such liquid ejection apparatus, owing to only draw in described liquid at the leading section of described nozzle with forming the space, so, can be used to return to the operation of the state that can spray liquid at short notice.
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 drawing in after the action, after through the stipulated time by described timer counting, the whole liquid that exist in described nozzle and the described stream are received in the described container by described blowback.
According to such liquid ejection apparatus, when holding state is long, the whole liquids recovery that exist in described nozzle and the described stream are arrived in the described container.Therefore, it is long more reliably to suppress holding state, and the viscosity of the easy more liquid that causes increases.
For this liquid ejection apparatus, be after having received the power supply open command during described holding state.
According to such liquid ejection apparatus, can be under the state that does not use the cap member, the viscosity that suppresses the liquid of the leading section of nozzle under the power-off state increases.It is the reasons are as follows.Under power-off state because liquid is pulled to an opposite side with emission direction, so, the liquid level of the liquid in the nozzle from the space in the outside of nozzle away from, be difficult to touch wind in the generation of the space in this outside.As a result, can suppress evaporation, thereby the viscosity that can suppress liquid increases from the moisture of liquid level.In addition, draw in action by above-mentioned, formed the 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, because the delay of the air of this stagnation point can realize also preserving moisture in the space of this stagnation point, the result can suppress the evaporation of the liquid level of the liquid in the nozzle, can suppress the viscosity increase of 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;
After having received described power supply open command, the whole liquid that exist in described nozzle and the described stream are received in the 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 the described stream are arrived in the described container.Therefore, can effectively suppress the viscosity increase of liquid under the power-off state.
This liquid ejection apparatus has: at the conveying mechanism of throughput direction pumped (conveying) medium be disposed with the head of a plurality of 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 the described head of mobile halted state to described medium ejection liquid.
According to such liquid ejection apparatus, can be under the situation of not using the cap member, the performance action effect that can suppress effectively to the viscosity increase of the liquid of the leading section of nozzle under the holding state.That is, described head is employed wardrobe in the so-called wardrobe printer, when being these wardrobe, for with cap member covering nozzles, need long cap member, it is formed in and is difficult on the manufacturing technology realize, but here owing to can in these wardrobe, omitting the cap member, so can avoid the problem on the 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
Do not carry out based on described data from the holding state of the ejection of the liquid of described nozzle the time, according to the mode that forms the space at least at the leading section of described nozzle, the step that described liquid is gone into to an opposite layback with emission direction.
According to such liquid ejection method, can be under the situation of not using the cap member, the viscosity of liquid of leading section that suppresses 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 of the surface structure of expression 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 media 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 printer 1 output and the corresponding print data of printing of image.
In computer 110, printed driver is installed.Printed driver is the program that the view data from application program output is transformed to print data.
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 with print data to printer 1 output.In the view data when being transformed to print data of self-application program in future, printed driver carries out resolution conversion processing shown in Figure 2, look conversion process, halftoning (half-tone) to be handled.
In resolution conversion is handled in (S110), will be transformed to print resolution when paper is printed (1600dpi * 1600dpi) for example from the view data (text data or view data etc.) of application program output.Wherein, each pixel data of the view data after resolution conversion is handled is the RGB data by many gray scales (for example 256 gray scales) of RGB color space performance.
In look conversion process (S120), reference colored conversion look-up table is transformed to described RGB data the cmyk data that is showed by the CMYK color space.Wherein, the pixel data after the look conversion process is the cmyk data by 256 gray scales of CMYK color space performance.
In halftone process (S130), the data of high grey are transformed to the data of few grey that printer 1 can form.View data after the halftone process, be that print data has and above-mentioned print resolution (the equal resolution ratio of 1600dpi * 1600dpi) for example.In the view data after halftone process (print data), for example, pixel data is set up corresponding relation by the pixel of the image that should print, pixel data becomes the data of the formation situation (having or not or size etc. of point) of the point of expression in each pixel.
The print data that generates through above resolution conversion processing, look conversion process, halftone process, the machine driver of being printed sends to printer 1.
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.
From receive the printer 1 of print data as the computer 110 of external device (ED), by controller 60 control each unit (supply unit 20, head unit 40 etc.).That is, controller 60 is controlled each unit, print image on paper according to the print data of receiving from computer 110.Situation in the printer 1 is monitored that by detector set 50 detector set 50 is exported testing result to controller 60.Controller 60 is controlled each unit according to the testing result from detector set 50 outputs.
＜supply unit 20 〉
Supply unit 20 (being equivalent to conveying mechanism) is used 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.
Paper feed roller 21 is the rollers that are used for paper supply in the principal direction printer 1 of sheet feed stacker 22, and paper feeding motor (not shown) rotation that is made of the DC motor drives.
Conveying roller 23A will transmit from the platen 25 in the principal direction throughput direction downstream that paper feed roller 21 receives.Conveying motor (not shown) rotation that this conveying roller 23A is made of the DC motor drives.
Platen 25 is for the paper from supported underneath is printed, and is configured in the supporting member between conveying roller 23A and the exit roller 27A, with the nozzle opposite disposed of the following 41a of printhead 41.
Exit roller 27A is that the paper that will be printed on platen 25 is further carried to the downstream of throughput direction, is discharged to the roller in the outside of printer 1.This exit roller 27A is connected with described conveying motor by suitable gear row, is carried the motor rotation to drive by this.
＜head unit 40 〉
＜ink viscosity increases anti-stop element 70 〉
Near the viscosity that ink viscosity increases the ink surface in the nozzle that anti-stop element 70 is used to suppress printhead 41 increases, and has the pipe pump 72 that is used for the ink in the nozzle is gone into to an opposite layback with emission direction etc.To be described in the back.
＜detector set 50 〉
Comprise in the detector set 50 rotary encoder (not shown), with (with reference to Fig. 4) such as the first paper detection sensor 53a, the second paper detection sensor 53b.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 is used for detecting the position of front end of the paper of paper supply, as shown in Figure 4, is set between paper feed roller 21 and the conveying roller 23A.The second paper detection sensor 53b is used for detecting the position of tail end of the paper of conveying, is set between printhead 41 and the exit roller 27A.
＜guidance panel 66 〉
In guidance panel 66, be provided with various action buttons such as power knob.Power knob is the ON/OFF switch that is used to connect/remove the power supply of printer 1.And, power knob and the controller of describing later 60 connect into and can communicate by holding wire, when pressing power knob, the power turn-on signal sends to controller 60, when pressing power knob once again, the power supply open command sends to controller 60, and after receiving this power supply open command, 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 is provided with below printhead 41.41a below printhead 41 by black (K), bluish-green (C), fuchsin (M), yellow (Y) each color, is spaced from each other at interval and disposes abreast the nozzle rows 411 that is made of a plurality of nozzle # 1～#n respectively at throughput direction.
Each nozzle # 1～#n of each nozzle rows 411 along with the straight line of the paper width of the throughput direction quadrature of paper on, with the nozzle P configuration at interval of regulation.This nozzle interval P decides according to the maximum of the print resolution of described paper width, and for example when maximum was 1600dpi, nozzle P at interval was 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, printhead 41 is fixed under the state of assigned position in print processing, and just the paper ejection ink droplet by transporting towards the upstream from throughput direction prints.
In each nozzle # 1～#n, as being used for ink is become 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, then 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 from nozzle # 1 of all kinds～#n.Can carry out the driving of each piezoelectric element according to each pixel data of print data.
To the providing ink of printhead 41, undertaken by the ink tank 43 that is configured in the printer 1.That is, shown in the schematic diagram of Fig. 6, head unit 40 has the ink tank 43 by the ink reservoir of all kinds of CMYK, and respectively by supply pipe 45 (being equivalent to stream), each nozzle in printhead 41 is supplied with the ink of corresponding color from each ink tank 43.Particularly, in printhead 41, form the stream of the ink that is communicated with each nozzle by each ink look, and connect described supply pipe 45 respectively at the end of ink tank 43 sides of each stream, thus, ink tank 43 interior inks can be to printhead 41 supplies.
By the way, in order to carry out the supply of ink reliably, the pressurized supply of ink in the 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 the described sealing bag 43a in the described ink tank 43, pressurized pump 47 pressurizations.Therefore, by this air pressure conquassation sealing bag 43a gently, thus, to the form that described supply pipe 45 extrudes, ink is supplied with to printhead 41 with the ink in the sealing bag 43a.Wherein, the pump 72 shown in Fig. 6 and valve 78 are to increase the relevant equipment of anti-stop element 70 with ink viscosity, will be described in the back.
===print processing===
Fig. 7 is the flow chart of print processing.Wherein, according to program stored in the memory 63, control each unit, carry out these actions by controller 60.This program has the code that is used to carry out each action.
If controller 60 is received the print command that sends from computer 110, then carry out print processing.For example the head (head) of the print data that sends from computer 110, comprise this print command.Then, controller 60 is analyzed the content of the various command that comprises in the print data that receives, and uses each unit, carries out following paper supply action, carries action, ink to spray action, the action of row's paper 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 the printer 1.That is, controller 60 drives paper feeding motors, makes paper feed roller 21 rotations of Fig. 4, and the paper of sheet feed stacker 22 is transported to conveying roller 23A, then, drive and carry motor, make conveying roller 23A rotation, to carry from the principal direction downstream that paper feed roller 21 is sent here,, then stop if its front end arrives described printing initiating position.This printing initiating position for example is between printhead 41 and the conveying roller 23A, and with the not opposed position of any nozzle of printhead 41.Wherein, can detect the arrival of this printing initiating position according to the described first paper detection sensor 53a.
Then, controller 60 begins 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 carry in the action at this, carry out from the ink ejection action (S206) of printhead 41 ejection ink droplets.
In this ink ejection action, according to print data, spray ink droplet intermittently from the nozzle of each nozzle rows 411, the result arranges along throughput direction on paper and forms a plurality of points, and at the paper width, with the nozzle of each nozzle rows 411 at interval P form point.Wherein, if there are not other data of printing on should the paper in printing, then finish this ink ejection action.
Then,, then finish to carry action (S208), arrange paper action (S210) if the tail end of paper arrives than printhead 41 row's paper starting position in downstream more.The action of row's paper 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 outside printer 1 at a high speed.Wherein, the tail end of paper arrives described row's paper starting position and is detected by the described second paper detection sensor 53b.
Afterwards, controller 60 judges whether to proceed print processing (S212).Then,, then turn back to described step S202, begin the paper supply action (S202) of ensuing paper,, then finish print processing if ensuing paper is not printed if ensuing paper is printed.Wherein, for example can the data that should print be arranged, carry out above-mentioned judgement according to whether residual in described print data.
Increase prevents to handle at ink viscosity in======
The increase of＜ink viscosity prevents to handle 〉
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 the part nozzle.
Under the printing holding state of not carrying out above-mentioned print processing or power-off state, be filled with ink in the general stream printhead 41 in, become the meniscus Is of the end of its ink that sprays side, arrived nozzle edge foremost, be nozzle opening Ne.Therefore, the ink surface Is of this meniscus always is in the state that is exposed to atmosphere, thereby, solvent in the ink, be that moisture evaporates from ink surface Is easily, as a result, be accompanied by the process of time, near nozzle opening Ne, solids ratios such as solute ratio such as the dyestuff in the ink or pigment improve relatively, make that near the ink viscosity the described nozzle opening Ne might increase.And this viscosity increase not only brings harmful effect to the spray volume or the drippage position of ink droplet, and if excessively, then 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 at least the mode that the leading section of nozzle forms space S P2 described ink is pulled to the emission direction opposition side (below, be also referred to as and regurgitate outgoing direction or regurgitate out side), thus, prevented that the viscosity of ink of the leading section of nozzle from increasing (with reference to Fig. 8 B).
Wherein, if form space S P2 at the leading section of nozzle so at least, the reasons are as follows of can suppressing then that the viscosity of ink increases is described.Shown in Fig. 8 A, when not drawing in ink, ink surface Is is positioned at nozzle opening Ne.That is, ink surface Is is in its outer peripheral edges Ise and is positioned at nozzle opening Ne, 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 touches the wind of blowing among the space S P1 below printhead 41 easily, the result, and near the ink the ink surface Is is compared evaporation simply by this wind.
Relative with it, shown in Fig. 8 B,, to regurgitating out the space S P2 that side forms ormal weight, then can make ink surface Is away from described wind from nozzle opening Ne if regurgitate out side by ink is pulled to, make described wind be difficult to touch ink surface Is.Thus, can suppress to suppress the increase of the viscosity of ink from the water evaporates of ink surface Is.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, based on the delay of the air of this stagnation point, make the space S P1 of the comparable printhead of space S P2 41 belows of this stagnation point keep higher humidity, the result has effectively suppressed the evaporation of the ink surface Is in the 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 space S P2 in addition.Therefore, when forming this space S P2, the outer peripheral edges Ise of ink surface Is is positioned at more to rely on than nozzle opening Ne and regurgitates out side, and in other words, ink surface Is spreads all over its whole, is positioned at than nozzle opening Ne to rely on the position of regurgitating out side.
Prevent from the kind handled from can list " ink is kept out of the way processing " and " ink recovery processing " these 2 kinds as the ink viscosity increase of this conception of species.
The former ink is kept out of the way processing shown in Fig. 9 A, be to make ink surface Is be positioned at nozzle, and meanwhile with ink to regurgitating out the processing that layback is gone into.Here, nozzle is meant along the normal direction of the opening surface of nozzle opening Ne, forms the part that does not have bend and identical shaped straight tube-like stream continuously from this nozzle opening Ne, refers to than described piezoelectric element more by the part (with reference to Fig. 9 A) of ejection 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 the nozzle,, that is, nozzle can be returned at once the state of printable processing so can make ink surface Is get back to the position of nozzle opening Ne at once.Therefore, this ink is kept out of the way to handle and is suitable for the short time and does not carry out the situation of print processing, in this printer 1, can carry out under the printing holding state of short-term relatively.
On the other hand, the latter's ink recovery is handled shown in Fig. 9 B, be will be in the stream of printhead 41 and supply pipe 45 in exist almost all ink recovery in ink tank 43, thus, make in the stream of printhead 41 and almost become empty processing in the supply pipe 45.And, handle according to this ink recovery, can prevent the evaporation of ink more chronically by the sealing bag 43a in the ink tank 43, the result can keep out of the way processing than above-mentioned ink and prevent that more chronically the viscosity of ink from increasing.
; because when having carried out this ink recovery processing, need before print processing, the ink in the ink tank 43 be recharged (with reference to Fig. 6) to printhead 41, so; instantaneity viewpoint from the energy instantaneous recovery to the state that can print processing, it is excellent that above-mentioned ink is kept out of the way processing.Therefore, this ink recovery is handled the situation that is suitable for not carrying out for a long time print processing, in printer 1, can carry out under the printing holding state of power-off state or longer-term.
＜ink viscosity increases anti-stop element 70 〉
Increase anti-stop element 70 by controller 60 control ink viscosities, carry out such ink viscosity increase and prevent to handle.Ink viscosity increases anti-stop element 70 shown in Fig. 7 and Fig. 9 B, has the by-passing valve 78 of the stream of the pipe pump 72, the bypass pipe 77 that is used for circuitous this pipe pump 72 and this bypass pipe 77 of switch that are provided with in the described supply pipe 45 that printhead 41 is supplied with at the ink with ink tank 43.Wherein, this ink viscosity increases anti-stop element 70 press each ink look of CMYK and is provided with, that is, and and with respect to each supply pipe 45 setting 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 is shown in Figure 10 A, have shell 73, be contained in shell 73 and can be around the rotating circular disk 74 of center of circle C74 rotation, outstanding and can rotate freely the ground a pair of pressure roller 75 that is provided with of point symmetry and the rotation not shown drive motors that drives rotating circular disk 74 each other to foreign side from the lateral surface of rotating circular disk 74, and described supply pipe 45 is configured between the outer peripheral face 74a of the internal face 73a of shell 73 and rotating circular disk 74.Therefore, if make rotating circular disk 74 rotations by described drive motors, then can be smoothed out with the fingers by the internal face 73a of pressure roller 75 and shell 73 in the supply pipe 45 and the part of pressure roller 75 butts, thus, make ink move in this direction of smoothing out with the fingers, and after smoothing out with the fingers, this by the part of smoothing out with the fingers and being out of shape by based on the flexible own recuperability of supply pipe 45, the original state of heaving can be got back to, at this moment, the ink that rises in the opposition side existence of the direction of smoothing out with the fingers can be drawn.Therefore, rotate to a direction, the ink in the supply pipe 45 can be carried to the direction along direction of rotation by making rotating circular disk 74.During certainly by pipe pump 72 ink deliveries, by-passing valve 78 yes closed condition.
Increase anti-stop element 70 according to such ink viscosity, can carry out described ink like that and keep out of the way and handle and the ink recovery processing by following.
Keep out of the way in the processing at ink, shown in Fig. 9 A, owing to the degree that is received in according to position in the nozzle with ink surface Is, ink is gone into to regurgitating out layback on a small quantity, so 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 the outgoing direction ink delivery, then, because the part that the quilt of supply pipe 45 is smoothed out with the fingers is by the flexible own recuperability based on self, can from the distortion state to the original recovering state of heaving, so supply pipe 45 in the generation regurgitate outgoing direction attraction, thus, the ink of the leading section of nozzle is drawn into, and the position that reaches ink surface Is is received into the interior degree of nozzle.And, do not rotate, keep this halted state by not making afterwards rotating circular disk 74, thereby keep the position of drawing in of described ink surface Is.
In addition, when print processing, shown in Fig. 8 A, need make the position of ink surface Is turn back to nozzle opening Ne (front-end edge of nozzle), can be by the by-passing valve 78 of opening Figure 10 B, carry out this and return processing (below, be called ink reset and handle).That is, if open by-passing valve 78, then the ink of ink tank 43 will be carried to nozzle side and pass through bypass pipe 77 not by pipe pump 72, and thus, ink surface Is resets to the position of nozzle opening Ne.Then, in print processing, this by-passing valve 78 is being kept open mode, and thus, ink can be provided for printhead 41 by bypass pipe 77.
And in ink recovery is handled, as described in Fig. 9 B, because with in the stream of printhead 41 and the whole ink transport that exist in the supply pipe 45, be recovered to ink tank 43, so, the rotating circular disk 74 of Figure 10 A is with the rotating speed corresponding with the amount of described whole inks that should reclaim, rotate continuously along regurgitating outgoing direction, stop then.So, during this continuous rotation, smooth out with the fingers the prescribed limit A of supply pipe 45 successively repeatedly by a pair of pressure roller 75, and repeating when being smoothed out with the fingers, all to make distortion turn back to the action of heaving by own restoring force, thus, finally make in the stream of printhead 41 and almost become empty in the supply pipe 45.
In addition, after this ink recovery is handled, print when handling, 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 rotating with above-mentioned opposite direction, realize this processing of returning (below, be called ink and recover handle).That is, if make rotating circular disk 74 to emission direction rotation, then basis and above-mentioned same pump principle, ink in the ink tank 43 is supplied to pipe 45 and attracts, in the stream of printhead 41, guide, final, in the supply pipe 45 and in the stream of printhead 41, till the nozzle opening Ne of the end that sprays side, be full of by ink, then, become the state that a spot of ink drips from nozzle opening Ne, if become like this, rotating circular disk 74 is stopped.
; 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, then in print processing, can't carry out normal ink ejection action. hereinTherefore, as the final work that this ink recovery is handled, can carry out wiping and handle.That is, by Wiping member shown in Figure 7 80, the formation face of the nozzle of the following 41a of wiping printhead 41 thus, makes the meniscus of nozzle opening Ne become the concave shape shown in Figure 11 B.Wiping member 80 is elastic plates that carpet veneer and rubber layer are pasted together.And this Wiping member 80 is configured in the below of printhead 41 shown in Fig. 6 B, also is provided with by not shown guide rail to move for coming and going in the guiding of paper width, and is used to make Wiping member 80 to come and go the driving mechanism (not shown) that moves.Therefore, if Wiping member 80 moves from direction the opposing party's of the position of readiness set at the two ends of paper width position of readiness, then in moving process, the nozzle of the last ora terminalis of Wiping member 80 and the following 41a of printhead 41 forms the face butt, this nozzle of wiping forms the nozzle of face, 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 handled and the key diagram of the enforcement example regularly that ink recovery is handled, and are the flow charts from the power connection of printer 1 to a series of processing of power supply releasing.When Figure 12 is power connection and the flow chart of processing afterwards, Figure 13 is the flow chart of the processing of power supply when removing.Wherein, the CPU62 by controller 60 reads the program corresponding with these handling processes from memory 63, according to described each unit of this programme-control etc., carries out these handling processes.
If the user presses power knob, then printer 1 is connected power supply.Then, follow in this, if controller 60 receives the power turn-on signal that sends from guidance panel 66, then controller 60 just begins 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, up to the handling process of interrupting handling Figure 13 based on the power supply open command.
As shown in figure 12, if receive the power turn-on signal, then controller 60 at first carries out " ink recovers to handle " (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, regularly carry out reason that ink recover to handle at this and be, when power supply disconnects as described later, carry out described " ink recovery processings ", thus, can make in the stream of printhead 41 with in the supply pipe 45 to become the dummy status (with reference to Fig. 9 B) that ink withdraws from.
Then, controller 60 increases for the viscosity of the ink that the printing holding state that prevents because of short-term causes, and transfers to step S304, carry out " ink is kept out of the way processing ", thus, in the position of ink surface Is is converged in scope in the nozzle, ink is gone into to regurgitating out layback.Then, transfer to step S306, after timer 65 is resetted, the counting of the device 65 that picks up counting.
This timer 65 is to print under the long situation of holding state, keeps out of the way processing to stopping also to prevent that the ink recovery that viscosity increases from handling the timer 65 that switches for a long time even be used for from the ink of current state.Therefore, in following step S308, controller 60 will be by the count value T and set binding hours Tth comparison of the current time of timer 65 counting, when surpassing binding hours, transferring to the ink recovery of step S316 handles, when being no more than, transfer to step S310, judge and whether receive the print command relevant with unenforced print processing.
Then,, repeat the comparison of said counting value T, on the other hand, when being the judgement of having received described print command, transfer to following step S312 when the judgement of step S310 is when not receiving the judgement of described print command, to turn back to described step S308.Then, in this step S312, carry out " ink reset processing ", thus, return to nozzle opening Ne, become the state (with reference to Fig. 8 A) that can spray ink droplet being pulled to the ink surface Is that regurgitates out side.
Then, transfer to step S314, carry out nozzle rinse (flushing).Nozzle rinse is to move with the ink ejection of common print processing similarly to drive piezoelectric element, and from the processing of nozzle ejection ink droplet, thus, the ink surface Is in the nozzle is cleaned the state for there not being viscosity to increase.The ink droplet that sprays based on nozzle rinse is received, is kept by the ink absorption material 26 that is provided with among the recess 25a above the platen shown in Figure 4 25.In addition, when 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 in Fig. 8, describe, omit explanation here at this print processing.Then, if this print processing finishes, then for corresponding with the printing holding state, turn back to above-mentioned step S304, carry out " ink is kept out of the way processing ", then, through beginning etc. of the timer 65 of above-mentioned step S306, standby in step S310, up to receiving the print command relevant with unenforced print processing, perhaps count value T surpasses binding hours Tth in step S308.
In addition, when printing at this among step S308 of holding state, when the count value T of timer 65 had surpassed described binding hours Tth, controller 60 made processing shift to step S316, carries out " ink recovery processing ".Then, in the stream of this printhead 41 and the whole inks in the supply pipe 45 be recycled to (with reference to Fig. 9 B) standby under the state in the ink tank 43, up to receiving the print command relevant with unenforced print processing, if received this print command (S318), then carry out " ink recovers to handle " of step S320, thus, become the state (with reference to Fig. 6) that is filled ink in the stream of printhead 41 etc., afterwards, transfer to step S322, carry out " print processing ".Then,, then, 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 for the viscosity of handling the ink that causes because of the printing holding state increases if print processing finishes.
And when removing the power supply of printer 1, the user is the power knob of push panel 66 once again, follows in this, sends the power supply open command from guidance panel 66.Then, if receive this power supply open command, then controller 60 begins the handling process of Figure 13.
That is, controller 60 at first judges whether be in print processing (S402), and standby when being judgement in the print processing finishes up to print processing.Then,, then the handling process of Figure 12 is interrupted handling, that is, shift, carry out " ink recovery processing " to the step S404 of Figure 13 if print processing finishes.Thus, be recycled to ink tank 43 (with reference to Fig. 9 B) with supply pipe 45 interior whole inks in the stream of printhead 41, do not print processing for a long time, also can prevent the state of the viscosity increase of ink even become.Then, controller 60 is removed the power supply (S406) of printer 1.
===other embodiment===
In the above-described embodiment, mainly put down in writing print system 100, but wherein comprised the description of liquid ejection apparatus and liquid ejection method etc. certainly.And above-mentioned embodiment is used to make understanding of the present invention to become easily not limited interpretation the present invention.The present invention can change, improve under the prerequisite that does not break away from its aim, and the present invention comprises its equivalent.Even embodiment described below is also contained among the present invention.
In the above-described embodiment, as liquid ejection apparatus, enumerated ink-jet printer 1, but also can be embodied as spray or the ejection ink beyond the liquid ejection apparatus of other liquid (being dispersed with the such fluid of the aqueous body of particle of functional material or gel etc.).For example, can be ejection comprises the aqueous body of material such as employed electrode material or color material in the manufacturing etc. of LCD, EL (electroluminescent) display and face active display with the form that disperses or dissolves liquid ejection apparatus; The ejection biochip is made the organic liquid ejection apparatus of employed organism; With the liquid ejection apparatus that uses, sprays the liquid that becomes test portion as accurate pipette.And then, also can be in precision optical machineries such as wrist-watch or camera accurately the liquid ejection apparatus of ejection lubricating oil, in order to form that the small packaged lens of using in the optical communication device etc. (optical lens) waits and on substrate transparent resin liquid such as ejection ultraviolet hardening resin liquid ejection apparatus, for etch substrate etc. and the liquid ejection apparatus of etching solutions such as ejection acid or alkali and spray the fluid blowout unit of gel.And, the present invention can be applied in any one blowoff wherein.
In the above-described embodiment, having enumerated the wardrobe printer as printer 1, but be not limited thereto, for example also can be serial printer.Promptly, can be to have had along the first direction alignment arrangements of stipulating the printhead of a plurality of nozzles, by carry out repeatedly this printhead in the second direction of intersecting with described first direction moves from described nozzle to media such as paper ejection ink and form the ink ejection action of point and the conveying action of carrying described medium, the printer of print image on described medium thus at described first direction.
In the above-described embodiment, as shown in figure 12, when printing holding state, carried out " ink is kept out of the way processing " (S304) after, behind binding hours Tth, (S316) shift to " ink recovery processing ", but be not limited thereto, also the ink that can not carry out S304 is kept out of the way processing, and horse back carries out S316 " ink recovery processing ".That is, can omit step from S304 to S314.And, can be according to the mode of position between nozzle and ink tank 43 of ink surface (meniscus) Is, that is, ink surface Is is positioned at the stream or supply pipe 45 ground of printhead 41 and goes into ink to regurgitating out layback.
In the above-described embodiment, as shown in figure 13, when receiving the 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 mode of the stream of position between nozzle and ink tank 43 of ink surface (meniscus) Is, that is, ink surface Is goes into ink to regurgitating out layback with being positioned at the stream of the printhead 41 beyond the nozzle or supply pipe 45.
In the above-described embodiment, as the pump that ink viscosity is increased anti-stop element 70 usefulness, enumerated pipe pump 72, but if at the ejection side of supply pipe 45 and the pump of the two directions energy ink delivery of regurgitating out side, then be not limited thereto, for example also can use gear pump (using the gear meshing of rotating to carry the pump of liquid).
In the above-described embodiment, as for example clear piezoelectric effect mode of the ejection mode of liquid based on piezoelectric element, but being not limited to this, for example also can be to utilize the bubble that produces in this liquid to make the thermojet mode of liquid from the 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,, ink tank 43 is configured in more eminence, then owing to can supply with ink from ink tank 43 to printhead 41, so can omit force (forcing) pump 47 according to this liquid level difference if compare with printhead 41.
In the above-described embodiment, the starting of undeclared force (forcing) pump 47 regularly and stop regularly, but natural, force (forcing) pump 47 can be stopped by controller 60 according to the power supply ON-and OFF-command according to the power turn-on signal by controller 60 startings.
In the above-described embodiment, do not describe ink in detail, but this ink is the aqueous body that contains solid constituents such as solutes such as dyestuff or pigment etc. in The suitable solvent such as water,, can enumerate dye ink or paint ink etc. that is.
Claims (6)
1. a liquid ejection apparatus sprays liquid according to data from nozzle, it is characterized in that, comprising:
Do not carry out based on described data from the holding state of the ejection of the liquid of described nozzle the time, according to the mode that forms the space at least at the leading section of described nozzle, carry out the controller of described liquid to the action of drawing in the emission direction opposition side; With
At the pump that described liquid is provided with to the stream that described nozzle is supplied with from the container of storing this liquid;
Described pump arrives the whole described liquids recovery that exists in described nozzle and the described stream in the described container.
2. liquid ejection apparatus according to claim 1 is characterized in that,
Described controller has timer;
After through the stipulated time by described timer counting, the whole liquid that exist in described nozzle and the described stream are received in the described container by described blowback.
3. liquid ejection apparatus according to claim 1 is characterized in that,
After receiving described power supply open command, the whole liquid that exist in described nozzle and the described stream are received in the described container by described blowback.
4. according to any described liquid ejection apparatus in the claim 1～3, it is characterized in that,
Have at the conveying mechanism of throughput direction pumped (conveying) medium and be disposed with the head of a plurality of described nozzles along the direction of intersecting with described throughput direction;
Carrying by described conveying mechanism in the process of described medium, from the described nozzle of the described head of mobile halted state to described medium ejection liquid.
5. liquid ejection apparatus according to claim 4 is characterized in that,
Described liquid is ink.
6. a liquid ejection method is characterized in that, comprising:
According to the step of data from nozzle ejection liquid;
Do not carry out based on described data from the holding state of the ejection of the liquid of described nozzle the time, according to the mode that forms the space at least at the leading section of described nozzle, with described liquid to the step of drawing in the emission direction opposition side; With
Utilization is at the pump that described liquid is provided with to the stream that described nozzle is supplied with from the container of storing this liquid, with the whole described liquids recovery that exists in described nozzle and the described stream step in the described container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110227819.8A CN102350873B (en) | 2007-07-02 | 2008-06-30 | Liquid ejection apparatus and liquid ejection method |
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-174306 | 2007-07-02 | ||
| JP2007174304 | 2007-07-02 | ||
| JP2007174304 | 2007-07-02 | ||
| JP2007174306 | 2007-07-02 | ||
| JP2007-174304 | 2007-07-02 | ||
| JP2007174306 | 2007-07-02 | ||
| JP2008-113047 | 2008-04-23 | ||
| JP2008113047 | 2008-04-23 | ||
| JP2008113047A JP2009029112A (en) | 2007-07-02 | 2008-04-23 | Liquid discharging apparatus and method of discharging liquid |
Related Child Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102277975A Division CN102336060A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN201110227881.7A Division CN102303456B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN2011102277937A Division CN102350876A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and liquid discharging method |
| CN201110227819.8A Division CN102350873B (en) | 2007-07-02 | 2008-06-30 | Liquid ejection apparatus and liquid ejection method |
| CN201110227804.1A Division CN102320190B (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101337462A CN101337462A (en) | 2009-01-07 |
| CN101337462B true CN101337462B (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110227881.7A Expired - Fee Related CN102303456B (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 |
| CN2008101252790A Expired - Fee Related CN101337462B (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 |
| CN201110227804.1A Expired - Fee Related CN102320190B (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 |
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| CN201110227881.7A Expired - Fee Related CN102303456B (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 |
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| CN2011102277975A Pending CN102336060A (en) | 2007-07-02 | 2008-06-30 | Liquid discharging apparatus and method of discharging liquid |
| CN201110227804.1A Expired - Fee Related CN102320190B (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 |
Country Status (2)
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| JP (2) | JP2009029112A (en) |
| CN (6) | CN102303456B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Also Published As
| Publication number | Publication date |
|---|---|
| JP5742878B2 (en) | 2015-07-01 |
| CN102336060A (en) | 2012-02-01 |
| CN101337462A (en) | 2009-01-07 |
| CN102350876A (en) | 2012-02-15 |
| CN102303456B (en) | 2014-06-18 |
| CN102320190A (en) | 2012-01-18 |
| CN102303456A (en) | 2012-01-04 |
| CN102350873A (en) | 2012-02-15 |
| CN102350873B (en) | 2015-11-25 |
| CN102320190B (en) | 2015-05-20 |
| JP2013154649A (en) | 2013-08-15 |
| JP2009029112A (en) | 2009-02-12 |
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