CN100427315C - Inkjet recording apparatus - Google Patents
Inkjet recording apparatus Download PDFInfo
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- CN100427315C CN100427315C CNB2006100597272A CN200610059727A CN100427315C CN 100427315 C CN100427315 C CN 100427315C CN B2006100597272 A CNB2006100597272 A CN B2006100597272A CN 200610059727 A CN200610059727 A CN 200610059727A CN 100427315 C CN100427315 C CN 100427315C
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Abstract
Provided is an inkjet recording apparatus which enables ink to be properly recovered from a gutter, and which can secure a sufficient length of an ink recovery passage. This inkjet recording apparatus comprises: a main body which is equipped with an ink vessel for storing the ink, an ink supply pump for supplying the ink, and an operation control part; a printhead which is equipped with a nozzle for jetting the ink, supplied from the main body, as ink particles, a charged electrode for charging the ink particles with electricity, and a deflecting electrode for deflecting the charged ink particles, and the gutter for trapping the ink particles unused for printing; and a cable which is equipped with an ink supply passage for supplying the ink to the printhead from the main body, the ink recovery passage for returning the ink particles, recovered by the gutter, to the ink vessel, and various types of signal wires for connecting the operation control part and the printhead together. The inkjet recording apparatus is characterized in that the printhead is provided with an ink recovery pump for sending the ink particles, trapped by the gutter, to the ink vessel.
Description
Technical field
The present invention relates to spray prepared Chinese ink continuously, utilizing the inkjet recording device of describing printed words and pattern on the thing that is printed of production line transmission by nozzle.
Background technology
The inkjet recording device of the continous way of being used widely as on metal can or frosting, printing the printing equipment of numeral or mark, spray prepared Chinese ink continuously from nozzle, make the ink droplet in the way of circling in the air charged, above-mentioned ink droplet deflection is printed by electric field.Existing inkjet recording device as the spy open 2000-203050 communique or spy open in the 2001-138544 communique disclosed, constitute by main body, record head and cable that main body is connected with record head.In main body, have storage prepared Chinese ink ink container, supply with the pump of prepared Chinese ink, reclaim the control section of the action of the pump of prepared Chinese ink and control tape deck from record head to ink container to record head from ink container.In record head, the nozzle that sprays as ink droplet by the prepared Chinese ink that main body is supplied with, make the charged charged electrode of ink droplet, the groove (ガ -) that makes the deflecting electrode of charged prepared Chinese ink deflection and collect untapped prepared Chinese ink by electrostatic field constitutes.In the cable that connects main body and record head, there is pipe that prepared Chinese ink flows and to the electric wiring of record head transmission electric signal.
For reclaiming untapped ink droplet in the printing with groove, being necessary to make the air pressure in the groove is negative pressure, yet negative pressure can only drop to 0 air pressure.In the structure of inkjet recording device, groove is to atmosphere opening, by prepared Chinese ink reclaim that pump makes also can only be from groove to the atmospheric pressure degree to the differential pressure maximum that reclaims pump.The restriction of so just having to be provided with, make length that prepared Chinese ink between inkjet recording device main body and the printhead reclaims stream for reclaim the length of prepared Chinese ink to main body to the differential pressure of atmospheric pressure degree from groove with maximum, hindered the corresponding of the flexibility relative with user's equipment with ink container.
And above-mentioned existing recorded device untapped prepared Chinese ink in body interior has record head reclaims the into pump of ink container.Because the inkjet recording device that the present invention relates to is used for production line, the length that connects the pipe of main body and record head generally is set at about 2～4m.To in record head, reclaim the into pump of main body by untapped prepared Chinese ink, in order to reclaim prepared Chinese ink and must to have sufficient ability from the position of leaving 2～4m.At this moment, reclaim air simultaneously with prepared Chinese ink.When using pump to carry the liquids and gases mixture, with pump be configured in carry the destination compare, from carrying on the near position, starting point, like this change of the flow of timeliness less, can carry out stable conveying.Below, so-called flow refers to the flow of the mixture that has mixed liquids and gases.
Existing inkjet recording device in order to reclaim prepared Chinese ink from position far away, is necessary the configuration that use traffic is big even if also can positively reclaim in the flow change, when diminishing.And because prepared Chinese ink viscosity when temperature reduces increases, the flow path resistance when flowing in pipe becomes big.And when record head was present on the position lower than main body, it is big that the flow path resistance during recovery becomes.Even if the flow path resistance during as described above the recovery becomes big situation, be necessary to use the big pump of recovery flow in order positively to reclaim prepared Chinese ink.Owing to be necessary to carry out fast drying after printing, the prepared Chinese ink that uses in inkjet recording device of the present invention uses high material such as the volatility of methyl ethyl ketone (MEK) etc. as solvent.At this moment, increase when reclaiming flow, owing to suck a large amount of air, the volatilization quantitative change of prepared Chinese ink solvent is big, the problem of baneful influence occurs environment is produced.And, in being provided with the workshop of production line, having under the situation of people's operation, the problem of baneful influence appears human body is also produced.
Summary of the invention
Therefore, purpose of the present invention is for providing a kind of inkjet recording device, under the state that makes this device work, can reclaim prepared Chinese ink well from groove, the length that reclaims the liquid road for prepared Chinese ink also can have surplus, and reduce the volatile quantity of prepared Chinese ink solvent, for environment or the less generation baneful influence of human body.
Inkjet recording device of the present invention has: the ink container with storage prepared Chinese ink, attract the main body of the prepared Chinese ink supply pump and the operation control section of prepared Chinese ink from above-mentioned ink container, has the nozzle that will spray as ink droplet from the prepared Chinese ink that above-mentioned prepared Chinese ink supply pump provides, make the charged charged electrode of above-mentioned ink droplet, make the deflecting electrode of charged ink droplet deflection, and the printhead of collecting the groove of the ink droplet that in printing, does not use, inside comprises prepared Chinese ink supply passageway from aforementioned body to above-mentioned printhead that supply with above-mentioned prepared Chinese ink from, the prepared Chinese ink that the ink droplet that will reclaim in above-mentioned groove is sent above-mentioned ink container back to reclaims path, and the cable that connects the various holding wires of aforesaid operations control section and printhead, this inkjet recording device is characterised in that, is provided with the prepared Chinese ink recovery pump of the ink droplet of collecting in the above-mentioned groove being given above-mentioned ink container in above-mentioned printhead.
And, the yield that utilizes this recovery pump is changed according to the result of the electriferous state of measuring ink droplet.And, under the situation that the variations in temperature of prepared Chinese ink, fluid resistance change, also the recovery flow that reclaims pump has been done to set and has been optimal yield.And, import the difference of height that prepared Chinese ink reclaims path and record head by touch panel etc., thereby can be set at the recovery flow of optimal recovery pump.
Description of drawings
Fig. 1 is the figure of the method for controlling pump of explanation ink-jet printer of the present invention.
Fig. 2 is the figure that shows the start method of work of inkjet recording device of the present invention.
Fig. 3 is the figure that shows the shutdown method of work of inkjet recording device of the present invention.
Fig. 4 shows first state of the pipe arrangement that is attached on the pump and the figure of the relation between the pressure in the pipe arrangement.
Fig. 5 shows second state of the pipe arrangement that is attached on the pump and the figure of the relation between the pressure in the pipe arrangement.
Fig. 6 is the figure that shows the train of pulse of the electriferous state that is used to check granular prepared Chinese ink drop.
Fig. 7 is for when applied train of pulse shown in Figure 6, by an example of the voltage waveform of electrified sensor detection.
Fig. 8 is the overview of inkjet recording device.
Fig. 9 is the figure that shows the body interior of inkjet recording device.
Figure 10 is the figure of the situation of the prepared Chinese ink circulation of explanation in inkjet recording device.
Figure 11 shows the figure that prepared Chinese ink reclaims the summary of pump.
Figure 12 shows the figure that prepared Chinese ink reclaims the attraction prepared Chinese ink action of pump.
Figure 13 shows the figure that prepared Chinese ink reclaims the discharge prepared Chinese ink action of pump.
The specific embodiment
Below, with reference to the accompanying drawings the working of an invention mode is described.
At first, show the general survey of inkjet recording device at Fig. 8.There is the prepared Chinese ink circulatory system that constitutes by the control section of tape deck, ink container, pump etc. in the inside of main body 100,, can carries out maintenance activity by switch door 105.And, cable 103 stretches out from main body 100, inside include from main body 100 to printhead 101 (below, be called record head sometimes) carry prepared Chinese ink pipe arrangement, reclaim the pipe arrangement of prepared Chinese ink and carry the distribution of electric signals to main body 100 from printhead 101 to printhead 101.This cable 103 requires lengthening according to the situation of subscriber equipment, make when main body 600 be provided with place and printhead 610 be provided with the place from the time also can tackle.Length about 4m is necessary.
And, in main body 100, there is the liquid crystal panel (guidance panel) 40 of touch panel formula, be used for the operator and import print What or print specification etc.And, on guidance panel 40, show in the control of tape deck perhaps running situation etc.Printhead 101 is covered by the lid of stainless steel, and portion accommodates the printing portion that circles in the air of making ink droplet, control ink droplet within it.The ink droplet of making in the inside of printhead 101 spues from the opening portion 102 that is arranged on the bottom surface, attached on the not shown recording medium and form image.
Below, utilize Fig. 9 to illustrate that the inside of main body 100 constitutes.
On the top of main body 100, dispose the electric information member of control substrate 109 grades.And, on lower body part 110, dispose the circulation class control member of magnetic valve 108, pump unit 106 etc., in its vicinity, accommodate the ink container 1 of the prepared Chinese ink of storage supply nozzle.But door 105 be a switch, ink container can be drawn from door 105 sides, and additional prepared Chinese ink or the maintenance activity that abandons prepared Chinese ink etc. become easy.
Below, utilize Figure 10 to illustrate that the prepared Chinese ink circulatory system of inkjet recording device of the present invention and the summary of printing portion constitute.
Be provided with the ink container 1 that holds prepared Chinese ink, the supply pump 2 of pressurized delivered prepared Chinese ink in the prepared Chinese ink supply passageway 21 in main body 100, regulate the pressure regulator valve 3 of prepared Chinese ink pressure and the pressure gauge 4 that shows the pressure of supply pump, in the prepared Chinese ink supply passageway 21 in record head 101, can catch the screen pack 5 of the foreign matter in the prepared Chinese ink and magnetic valve 32 be arranged on nozzle 6 near.In nozzle 6, piezoelectric element is installed, during circling in the air, splits into particle by the prepared Chinese ink that the sine wave about 70kHz is applied to the ejection of the aperture on the terminal that is present in nozzle 6 on the piezoelectric element.On charged electrode 7, be connected with tracer signal source (not shown), by on charged electrode 7, applying tracer signal voltage, and make the ink droplet 8 that sprays regularly by nozzle 6 charged.Because top deflecting electrode 9 is connected with high voltage source (not shown), deflecting electrode 10 ground connection in bottom are so form electrostatic field between top deflecting electrode 9 and bottom deflecting electrode 10.When charged droplets 8 was passed through in electrostatic field, the carried charge that self has according to ink droplet 8 was deflected, and on not shown recording medium, formed image.
Prepared Chinese ink in record head reclaims in the path 22, be provided with groove 11, screen pack 12 and prepared Chinese ink reclaim pump (below, sometimes be called and reclaim pump) 14, utilize groove 11 to reclaim not ink droplet 8 charged, that by above-mentioned electrostatic field the time, be not deflected, send ink container 1 back to and can utilize again by charged electrode 7.And, in the formation of this figure, screen pack 12 is arranged on the entrance side that reclaims pump 14, however also can be arranged on reclaim the delivery side of pump side, be the ink container side that pressure applies.
Existing inkjet recording device is arranged in the main body 100 owing to reclaim pump 14, is sucking prepared Chinese ink with record head from the position of 2～4m so constitute.This is in order to realize prepared Chinese ink supply pump and prepared Chinese ink are reclaimed the purpose of the miniaturization of pump integrated and implement device, yet in the present embodiment, employing will be reclaimed pump 14 and is arranged on the interior formation of record head.As present embodiment, be arranged near the record head by prepared Chinese ink being reclaimed pump, compare with conventional device and can shorten significantly to the distance that reclaims pump 14 from groove 11.Like this, reclaiming pump 14 can the powerful prepared Chinese ink that attracts to be present in by collection groove 11 by strong negative pressure (comparing with atmospheric pressure), by reclaiming pump 14 pressurizations, more than half prepared Chinese ink can be delivered to ink container from prepared Chinese ink recovery path 22.If as present embodiment, if accounted for most based on the prepared Chinese ink conveying of pressurization, then the restriction of differential pressure disappears, and can prolong the length of cable 103 (prepared Chinese ink reclaims path 22) fully.
And, as hereinafter described, can successfully reclaim prepared Chinese ink with the little pump of existing pump phase specific capacity owing to use, can realize the further miniaturization of device.And, when using the pump conveying to mix the mixture of liquids and gases, pump is configured in carrying the destination to compare from carrying on the near position, starting point, can carry out the few stable conveying of change of the flow of timeliness like this.
Below, use accompanying drawing that one example of the pump 14 that uses among the present invention is described, exemplified an example of the recovery pump 14 that uses among the present invention among Figure 11.And the structure of pump is not limit by present embodiment.
Reclaiming pump 14 is membrane pump.
This recovery pump has: main body case 47, the barrier film 41 that moves back and forth in main body case 47, be present in prepared Chinese ink chamber 42 between one-sided and main body case 47 inside of barrier film 41, advance black side ports (Port-ト) 45 and go out black side ports and (Port-ト) 46, be arranged on entrance side check-valves 43 on the into black side ports 45, be arranged on out the outlet side check-valves 44 on the black side ports 46 with what the mode that is connected with prepared Chinese ink chamber 42 was provided with.
And, be connected with the mode that groove 11 is connected to advance black side ports 45, reclaim the mode that path 22 is connected with the port 46 that goes out black side and prepared Chinese ink and be connected.
When pump did not move, entrance side check-valves 43 and outlet side check-valves 44 were close to main body case 47, and the pressure differential in atmosphere and prepared Chinese ink chamber 42 is disappeared.
Figure 12 shows and reclaims pump 14 sucks ink droplet 8 from groove 11 action.
When barrier film 41 in the mode of the volume that increases prepared Chinese ink chamber 42 during to check-valves direction reverse mobile, generation negative pressure prepared Chinese ink chamber 42 in is attracted into oral-lateral check-valves 43.Arrive groove 11, the suction ink droplet 8 at this place by the port 45 that advances black side by the negative pressure that is attracted into oral-lateral check-valves 43, prepared Chinese ink chamber 42.
Conversely, outlet side check-valves 44 is attracted by the negative pressure in prepared Chinese ink chamber 42 and is close to main body case 47, and the mode that is not passed to out black side ports 46 with the negative pressure in prepared Chinese ink chamber 42 is interdicted.
Figure 13 represents that prepared Chinese ink reclaims the action that pump transmits ink droplet 8 to the ink container pressurization.
When barrier film 41 in the mode of the volume that reduces prepared Chinese ink chamber 42 when the check-valves direction moves, prepared Chinese ink chamber 42 generates malleations, jack-up outlet side check-valves 44.The smaller volume in prepared Chinese ink chamber 42, the ink droplet 8 that is sucked by prepared Chinese ink chamber 42 by jack-up outlet side check-valves 44 be by going out black side ports 46, and discharge to ink container 1.
Conversely, entrance side check-valves 43 is oppressed by the malleation in prepared Chinese ink chamber 42 and is close to main body case 47, and the mode that is not passed to into black side ports 45 with the malleation in prepared Chinese ink chamber 42 is interdicted
Like this, by the reciprocating action of barrier film 41, suck the ink droplet 8 collected by groove 11, be delivered to ink container 1 side.
And the recovery pump 14 of this diaphragm type simple structure that the barrier film that carries out reciprocating action, entrance side check-valves and outlet side check-valves constitute of serving as reasons because performance does not change with installation direction, therefore has all installable in any direction advantage.
Fig. 4 and Fig. 5 show the result of the pipe pressure inside of measuring under the situation of the mixture that utilizes pump to carry liquids and gases in pipe.The prepared Chinese ink that the conveying capacity of the pump of this situation is set in the existing inkjet recording device reclaims about 1/3rd of pump.
Fig. 4 (a) is for being 0.5m when the distance that reclaims pump from the suction inlet to prepared Chinese ink, reclaiming prepared Chinese ink recovery pump and the manometric allocation plan of pump when the distance of outlet is 4m from prepared Chinese ink.Fig. 4 (b) is for when carrying the mixture of liquids and gases, and prepared Chinese ink is reclaimed the maximum of the pressure of pump position as 0, when changing the position of the prepared Chinese ink recovery passage side of discharging side and the measurement result of minimum of a value.Because attracting side is short 0.5m, not shown its value.Exist the reason of maximum and minimum of a value to be, the prepared Chinese ink that uses reclaims pump and is membrane pump, and the mixture owing to squeeze out liquids and gases with about 30Hz has pulsation in the pressure in the conveying.Demonstrated this moment, because along with the increase, the pressure that reclaim the distance of pump with prepared Chinese ink slowly descend, carries out stable conveying discharging side.
Fig. 5 (a) is for being 4m when the distance that reclaims pump from the suction inlet to prepared Chinese ink, reclaiming prepared Chinese ink recovery pump and the manometric allocation plan of pump when the distance of outlet is 0.5m from prepared Chinese ink.Fig. 5 (b) is under the situation of the mixture of carrying liquids and gases, and the position of prepared Chinese ink being reclaimed pump is as 0, in the maximum that sucks the pressure of oral-lateral when locating of pressure changed and the measurement result of minimum of a value.In this case, along with the distance that reclaims pump from the suction inlet to prepared Chinese ink shortens, it is big that the maximum of pressure and the difference of minimum of a value become.Because when the absolute value of pressure was big, transporting velocity was little state, when the absolute value of pressure hour, transporting velocity is big state, so fluid periodically be high speed for a moment, is low speed for a moment, becomes unsettled fluid.Because the state of Fig. 5 is the prepared Chinese ink recovery method of existing ink jet type device, the state of Fig. 4 is a prepared Chinese ink recovery method of the present invention, has demonstrated recovery method of the present invention and can carry out stable prepared Chinese ink recovery with low recovery ability.
According to top result, in the present embodiment, the pump that disposes in record head has with the recovery pump 14 that uses in existing ink-jet printer compares about 1/3rd conveying capacity.Owing to can reduce conveying capacity, the size of pump also diminishes, and can dispose in record head and reclaim pump 14.By reducing conveying capacity, the gas flow that mixes with liquid reduces, and therefore also can reduce the volatile quantity of solvent.
Below, use Fig. 1, Fig. 2 and Fig. 3 to illustrate that the prepared Chinese ink in the present embodiment reclaims the driving method of pump.
Fig. 2 shows the order when starting inkjet recording device.When the operator is turned round the input (start) that begins by touch panel (guidance panel 40) (200), at first prepared Chinese ink reclaims pump 14 entrys into service (201).The prepared Chinese ink that remain in the prepared Chinese ink recovery path 22 come into play, through after the stand-by time that becomes certain regulation that flows (202), and supply pump 2 entrys into service (203).In the present embodiment, owing to use less compared with the existing pump, before becoming certain flowing, the prepared Chinese ink that stops to need the time.
After supply pump 2 entrys into service, the magnetic valve 32 that is present in the record head 101 is opened, and prepared Chinese ink is from nozzle 6 ejections., on piezoelectric element apply voltage, make prepared Chinese ink granulating (204) thereafter.
Reduce conveying capacity (205) that prepared Chinese ink reclaim pump 14 thereafter.Because from the prepared Chinese ink of nozzle 6 ejections is a certain amount of, in fact the air conveying capacity reduces.This carries out for the volatile quantity that reduces solvent (methyl ethyl ketone (MEK) etc.), sets for prepared Chinese ink and reclaims the conveying capacity that does not have obstacle.Then, with the electriferous state (206) of electrified sensor 33 mensuration ink droplets,, then move to the beginning pattern (210) of printing if electriferous state is good.If electriferous state is unusual, then stop to close magnetic valve 32 (207) to the piezoelectric element energising, make supply pump 2 stop back (208), on guidance panel 40, show indication, make in groove 11 a spot of solvent that flows, carry out the cleaning (209) of recovery system to the operator.And, the unusual method that detects electriferous state is described in the back.
Fig. 3 shows the order when stopping inkjet recording device work.When the operator is turned round the input that stops by touch panel 40 (300), at first magnetic valve 32 is closed (301), and then supply pump 2 shuts down, and stops to supply with prepared Chinese ink (302) to nozzle 6.Thereafter, the more than half prepared Chinese ink in being present in prepared Chinese ink recovery path 22 is recovered into and enters holding state before the ink container 1, and through (303) behind the official hour, prepared Chinese ink reclaims pump 14 and stops (304).
Below, the pump method of operation when inkjet recording device runs well is described.In the operating condition of inkjet recording device, suck air with prepared Chinese ink from groove 11.Therefore, suck near the dust that groove 11, swims.Catch dust owing to be configured in the screen pack 12 of the upstream side of suction pump (prepared Chinese ink reclaims pump 14), so stop up as time goes by.In this case, prepared Chinese ink reclaims the inefficiency of pump 14, in the prepared Chinese ink recovery speed decline of groove 11.When prepared Chinese ink recovery speed reduced, near the measurement result of the prepared Chinese ink carried charge that detects the electrified sensor on the downstream position that is configured in groove 11 33 changed gradually.By detecting this variation, control prepared Chinese ink in the mode of the yield that increases prepared Chinese ink and reclaim pump 14.That is, do not stop the recovery speed of inkjet recording device, raising prepared Chinese ink.Even if improve the recovery flow that prepared Chinese ink reclaims pump 14, in fact owing to stop up, the soakage of air changes little, so do not increase the volatile quantity of solvent.It is many that obstruction in screen pack 12 becomes, when recovery causes obstacle for prepared Chinese ink, if demonstration is carried out the such information of cleaning of screen pack 12 and is impelled cleaning on guidance panel 40, on one side then can adjust the working condition of production line, Yi Bian carry out the cleaning of screen pack 12.
Use Fig. 1, Fig. 6 and Fig. 7 that the detection method of the carried charge of above-mentioned prepared Chinese ink is described herein.
Fig. 1 shows the figure that is used for making based on the result who detects the prepared Chinese ink carried charge control system of the yield variation of reclaiming pump 14.The method of using this figure explanation that the prepared Chinese ink yield is changed.Between groove 11 and screen pack 12, there is electrified sensor 33, detect the carried charge of the prepared Chinese ink of retrieving from groove 11.When prepared Chinese ink passes through in charged electrode 7; according to being applied to magnitude of voltage on the charged electrode 7 and charged; but owing in printing, be applied in the state of voltage for deflecting electrode 9,10; the frequency that is used to detect the pulse of carried charge is an ink droplet from groove 11 low-voltage of departure degree not with being applied to the pulsion phase that is used to make on the granular piezoelectric element of prepared Chinese ink with, the size of voltage.Charged ink droplet is reclaimed by groove 11, by electrified sensor 33.The voltage signal that obtains in electrified sensor 33 amplifies with 34 thousands of times to tens thousand of times ground of amplifier, removes interference component by bandpass filter 35.Short switch 39 is regularly connected, and measures the prepared Chinese ink carried charge repeatedly.The testing result of this signal is sent to microprocessor (MPU) 36.Microprocessor 36 is the circuit important document of control ink-jet printer integral body, and, in microprocessor 36, be connected with ROM37 and RAM38.ROM37 is the memory of storage microprocessor 36 necessary programs of action or data etc., and RAM is the interim memory of data of handling when preserving above-mentioned microprocessor 36 performing a programmes.
Fig. 6 shows and is used for the potential pulse that carried charge detects.Pulse for and be applied on the piezoelectric element pulsion phase with frequency, be 8 kinds of pulses of staggering with the impulse phase that is applied on the piezoelectric element.Successively these 8 kinds of pulses are applied on the charged electrode and make ink droplet charged,, determine the pulse of only phase place by detecting carried charges by electrified sensor 33, make ink droplet charged, print.The method of the only phase place of decision is described herein.
As mentioned above, the prepared Chinese ink of the aperture ejection on the terminal that is present in nozzle 6, the vibration that causes along with the piezoelectric element that is installed on the nozzle and vibrating is at the interregional ink droplet that is split into by the charged electrode clamping.In the moment of division, ink droplet is charged pro rata with the voltage that is applied on the charged electrode.The position that prepared Chinese ink splits into ink droplet changes according to the viscosity of prepared Chinese ink, therefore is necessary to adjust the only opportunity (with the phase difference that is applied to the signal on the piezoelectric element) that charged signal is provided to each ink droplet.At first, apply the train of pulse of the some (for example, 20) of 0 phase to charged electrode.Therebetween, 20 ink droplets by charged electrode enter groove, detect 20 carried charge by electrified sensor 33.After connection short switch 39 carries out initialization, apply the train of pulse of the some of 1 phase, similarly measure 20 carried charge.
With its 8 phases repeatedly, detect voltage waveform shown in Fig. 7 (a) by electrified sensor.In this example, 3 phase times are the state that regularly conforms to most with granulating, and the prepared Chinese ink carried charge becomes maximum.Because this state is for suitably carrying out the state that prepared Chinese ink reclaims, according to the pulse that phase deviation generates, the carried charge of prepared Chinese ink changes.When setting suitable threshold level, to carry out under the situation of 2 values with the size of voltage according to this level, from 1 to the 5 phase result of 2 values continuously is 1, from 6 to the 0 phases result of 2 values continuously are 0.Even if make threshold level become B should be inclined to also and do not change by detecting, thereby as can be known, the 3rd is that only pulse applies timing mutually from A.In printing, by change the carried charge of each particle in the moment of the 3rd phase switching electrified voltage.Under the recovery that utilizes recovery pump situation in good condition, can detect this carried charge.
When the recovery state of prepared Chinese ink was low, the voltage waveform that is detected by electrified sensor 33 was shown in Fig. 7 (b).This is because the recovery state of prepared Chinese ink is bad, even if the production burst of skew phase place because the residual influence that the carried charge of the prepared Chinese ink that reclaims is previously arranged, the pulsion phase that generates with the skew phase place is corresponding, the carried charge of prepared Chinese ink with low uncertainty.Under the situation of threshold level A, the result of 2 values continuously but be not 1, under the situation of threshold level B, the result of 2 values 1 can judge prepared Chinese ink to reclaim state low by detecting such state.
By detecting the deterioration that prepared Chinese ink reclaims state, control the feasible yield that utilizes prepared Chinese ink to reclaim pump and increase, thereby carry out the running of stable device.
The temperature of prepared Chinese ink is one of the factor that makes the recovery state variation of prepared Chinese ink.Because when the temperature of prepared Chinese ink descended, viscosity increased, flow path resistance increases, and the conveying capacity of prepared Chinese ink descends.Therefore,, set the recovery flow that prepared Chinese ink reclaims pump, even if under the situation of feasible variations in temperature, fluid resistance variation, also be only recovery state at prepared Chinese ink by near the temperature the mensuration ink container.
And because inkjet recording device of the present invention is used on the production line, the pipe that connects ink container and record head has the length of 2～4m.When the extreme higher position of prepared Chinese ink recovery path was higher than the position of record head, flow path resistance increased.Therefore, for record head, when the position height of prepared Chinese ink recovery path, when its difference of height becomes big, it is big that flow path resistance becomes, and the conveying capacity of prepared Chinese ink descends.Difference of height between extreme higher position by reclaiming path from touch panel input prepared Chinese ink and the position of record head makes that the yield that reclaims pump is only amount, thereby can carry out stable prepared Chinese ink recovery.
According to the present invention, reclaim pump by configuration in record head, the equable prepared Chinese ink of the flow of formation time reclaims path, and therefore replaceable one-tenth is than the pump of the recovery flow that employed recovery pump is little in the existing inkjet recording device.Therefore, when prepared Chinese ink is carried, can reduce the volatile quantity of solvent, have the dysgenic effect that can prevent environment.
And, according to inkjet recording device provided by the invention, can make the differential pressure that from the groove to prepared Chinese ink, reclaims pump more than or equal to atmospheric pressure, do not reclaim the restriction of length of the differential pressure of path according to prepared Chinese ink, this device has the length that reclaims path more than or equal to prior ink, can carry out flexible reply at user's equipment.
Claims (6)
1. inkjet recording device has:
Have storage prepared Chinese ink ink container, attract the main body of the prepared Chinese ink supply pump and the operation control section of prepared Chinese ink from above-mentioned ink container,
Have the prepared Chinese ink that will supply with from above-mentioned prepared Chinese ink supply pump with the nozzle of the form ejection of ink droplet, make the charged charged electrode of above-mentioned ink droplet, make the deflecting electrode of charged ink droplet deflection and the printhead of collecting the groove of the ink droplet that printing, does not use,
Inside comprises that supplying with the prepared Chinese ink supply passageway of above-mentioned prepared Chinese ink, the ink droplet that will collect from aforementioned body to above-mentioned printhead in above-mentioned groove sends the cable that the prepared Chinese ink of above-mentioned ink container reclaims path and connects the various holding wires of aforesaid operations control section and printhead back to
This inkjet recording device is characterised in that:
The prepared Chinese ink recovery pump that the ink droplet that will collect in above-mentioned groove is sent above-mentioned ink container back to is arranged in the above-mentioned printhead.
2. according to the inkjet recording device of claim 1 record, it is characterized in that:
Prepared Chinese ink chamber between above-mentioned prepared Chinese ink reclaims pump have main body case, the barrier film that moves back and forth in the aforementioned body case, is present in the one-sided of above-mentioned barrier film and the aforementioned body case, advance black side ports and go out black side ports, be arranged on and above-mentionedly advance the entrance side check-valves on the black side ports and be arranged on the above-mentioned outlet side check-valves that goes out on the black side ports with what the mode that is connected with above-mentioned prepared Chinese ink chamber was provided with
Advance black side ports and be connected with above-mentioned with the mode that above-mentioned groove is connected,
Go out black side ports and above-mentioned prepared Chinese ink and reclaim the mode that path is connected and be connected with above-mentioned.
3. according to the inkjet recording device of claim 1 or 2 records, it is characterized in that:
It is shorter to the distance of above-mentioned ink container than reclaim pump from above-mentioned prepared Chinese ink to the distance of above-mentioned groove to reclaim pump from above-mentioned prepared Chinese ink.
4. inkjet recording device, ink container with storage prepared Chinese ink, supply with the supply pump of prepared Chinese ink to record head from above-mentioned ink container, reclaim the recovery pump of prepared Chinese ink to above-mentioned ink container from above-mentioned record head, and the recovery path that connects the prepared Chinese ink supply passageway of above-mentioned ink container and record head and the ink droplet recovery that the general not use in printing, in above-mentioned record head, has the prepared Chinese ink that to supply with by above-mentioned supply pump nozzle with the form ejection of ink droplet, make the charged charged electrode of above-mentioned ink droplet, make the deflecting electrode of charged ink droplet deflection by electrostatic field, and the groove of collecting the ink droplet that in printing, does not use, this inkjet recording device is characterised in that
Above-mentioned recovery pump is set in above-mentioned record head, is determined at the carried charge of the prepared Chinese ink of collecting in the groove, have the unit that makes the yield variation that utilizes above-mentioned recovery pump based on this carried charge measurement result.
5. according to the inkjet recording device of claim 4 record, it is characterized in that,
Have according to above-mentioned prepared Chinese ink and reclaim the unit that path and the difference of height of the position of said nozzle make the yield variation of above-mentioned recovery pump.
6. according to the inkjet recording device of claim 4 record, it is characterized in that
Has the unit that the measurement result according to the environment temperature of above-mentioned ink container changes the yield of above-mentioned recovery pump.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005069263 | 2005-03-11 | ||
| JP2005069263A JP4629465B2 (en) | 2005-03-11 | 2005-03-11 | Inkjet recording device |
| JP2005-069263 | 2005-03-11 | ||
| JP2005-074232 | 2005-03-16 | ||
| JP2005074232 | 2005-03-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1830673A CN1830673A (en) | 2006-09-13 |
| CN100427315C true CN100427315C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100597272A Expired - Fee Related CN100427315C (en) | 2005-03-11 | 2006-03-03 | Inkjet recording apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4629465B2 (en) |
| CN (1) | CN100427315C (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4579727B2 (en) * | 2005-03-16 | 2010-11-10 | 株式会社日立産機システム | Inkjet recording device |
| JP4832356B2 (en) * | 2007-05-08 | 2011-12-07 | 株式会社日立産機システム | Inkjet recording device |
| US8523334B2 (en) * | 2007-10-12 | 2013-09-03 | Videojet Technologies Inc. | Ink supply system |
| CN101497265B (en) * | 2008-01-28 | 2011-08-31 | 株式会社日立产机系统 | Inkjet recording apparatus |
| JP5274172B2 (en) * | 2008-09-17 | 2013-08-28 | 株式会社日立産機システム | Inkjet recording device |
| JP5216720B2 (en) * | 2009-08-28 | 2013-06-19 | 株式会社日立産機システム | Inkjet recording device |
| FR2956061B1 (en) * | 2010-02-11 | 2012-12-21 | Markem Imaje | INDUSTRIAL INK JET PRINTER WITH DIGITAL COMMUNICATION |
| DE102011113664A1 (en) * | 2011-09-20 | 2013-03-21 | Simaco GmbH | Method and device for homogenizing ink for inkjet devices |
| CN103963484B (en) * | 2013-01-25 | 2016-03-23 | 中国科学院理化技术研究所 | A kind of device making metallic particles charged |
| JP5940005B2 (en) * | 2013-03-08 | 2016-06-29 | 株式会社日立産機システム | Inkjet recording device |
| JP6114125B2 (en) * | 2013-07-03 | 2017-04-12 | 株式会社日立産機システム | Inkjet recording device |
| CN104908428A (en) * | 2015-06-03 | 2015-09-16 | 厦门英杰华机电科技有限公司 | Ink path system of electric field deflection type CIJ-UV ink-jet printer |
| CN105459602A (en) * | 2016-01-12 | 2016-04-06 | 广州易达包装设备有限公司 | Spraying head used for non-contact ink-jet printer |
| GB2551156B (en) * | 2016-06-07 | 2020-12-30 | Linx Printing Tech | Inkjet printer |
| JP6919988B2 (en) * | 2017-08-31 | 2021-08-18 | 株式会社日立産機システム | Inkjet recording device and its control method |
| EP4241999A3 (en) * | 2018-06-06 | 2023-11-01 | Hitachi Industrial Equipment Systems Co., Ltd. | Inkjet recording device |
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| JP2698633B2 (en) * | 1987-11-20 | 1998-01-19 | キヤノン株式会社 | Liquid jet recording device |
| US5434605A (en) * | 1992-09-21 | 1995-07-18 | Hewlett-Packard Company | Automatic failure recovery method and system for ink-jet printheads |
| CN1105024C (en) * | 1998-06-29 | 2003-04-09 | 伊马治公司 | Ink circuit, ink jet machine and conditioning machine or conveyor using such circuit |
| JP2000203050A (en) * | 1999-01-14 | 2000-07-25 | Keyence Corp | Ink jet recording apparatus |
| JP2001138544A (en) * | 1999-11-16 | 2001-05-22 | Hitachi Ltd | Ink jet recording apparatus |
| US20050046682A1 (en) * | 2003-08-27 | 2005-03-03 | Fuji Photo Film Co., Ltd. | Ink jet recording apparatus |
| CN1559800A (en) * | 2004-03-09 | 2005-01-05 | 健 梁 | Full automatic nozzle cleaning device for digital ink-jet printer and its use method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4629465B2 (en) | 2011-02-09 |
| JP2006248085A (en) | 2006-09-21 |
| CN1830673A (en) | 2006-09-13 |
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| CI02 | Correction of invention patent application |
Correction item: Priority Correct: 2005.03.16 JP 2005-074232 False: Lack of priority second Number: 37 Page: The title page Volume: 22 |
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Free format text: CORRECT: PRIORITY; FROM: MISSING THE SECOND ARTICLE OF PRIORITY TO: 2005.3.16 JP 2005-074232 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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