WO2013150682A1 - Dispositif d'enregistrement à jet d'encre - Google Patents

Dispositif d'enregistrement à jet d'encre Download PDF

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Publication number
WO2013150682A1
WO2013150682A1 PCT/JP2012/080664 JP2012080664W WO2013150682A1 WO 2013150682 A1 WO2013150682 A1 WO 2013150682A1 JP 2012080664 W JP2012080664 W JP 2012080664W WO 2013150682 A1 WO2013150682 A1 WO 2013150682A1
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WO
WIPO (PCT)
Prior art keywords
ink
solvent
container
recording apparatus
flow path
Prior art date
Application number
PCT/JP2012/080664
Other languages
English (en)
Japanese (ja)
Inventor
井上　智博
岡野　守
崇博 有馬
Original Assignee
株式会社 日立産機システム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 株式会社 日立産機システム filed Critical 株式会社 日立産機システム
Publication of WO2013150682A1 publication Critical patent/WO2013150682A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/075—Ink jet characterised by jet control for many-valued deflection
    • B41J2/08—Ink jet characterised by jet control for many-valued deflection charge-control type
    • B41J2/085—Charge means, e.g. electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/075—Ink jet characterised by jet control for many-valued deflection
    • B41J2/095—Ink jet characterised by jet control for many-valued deflection electric field-control type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/12—Guards, shields or dust excluders
    • B41J29/13—Cases or covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure

Definitions

  • the present invention relates to an ink jet recording apparatus that performs printing by ejecting ink from nozzles.
  • a venting circuit connecting the ink container is provided, and a solvent processing device for removing the solvent component of the ink contained in the exhaust is provided in at least one location of the venting circuit.
  • a solvent processing device for removing the solvent component of the ink contained in the exhaust is provided in at least one location of the venting circuit.
  • air containing the solvent is liquefied.
  • an ink jet recording apparatus that separates solvent and air, sends the separated air to a print head, and collects the separated solvent in a solvent collection container or an ink container (see, for example, Patent Document 1).
  • the solvent separated from the air by the solvent processing apparatus is recovered in the solvent recovery container or the ink container and reused, so that the consumption of the solvent can be reduced.
  • the present invention has been made based on the above-described matters, and an object of the present invention is to provide an ink jet recording apparatus capable of reducing solvent consumption by preventing re-volatilization after condensation in the solvent component of the ink. is there.
  • a first invention provides a print head for printing on a printing material, an ink container for storing ink containing a solvent, and supplying the ink in the ink container to the print head.
  • An ink jet recording apparatus comprising: an ink supply unit configured to perform recovery; and an ink recovery unit configured to recover the ink that has not been used for the printing object by the print head in the ink container. It is assumed that a discharge flow path that discharges to the outside of the ink container, a solvent recovery container that recovers the solvent from the gas in the discharge flow path, and a temperature adjustment unit that cools the solvent recovery container.
  • the apparatus further comprises a discharge flow path connecting the ink container and the solvent recovery container, and a temperature adjusting means for cooling the discharge flow path. To do.
  • the third invention is characterized in that, in the first or second invention, further comprises a temperature adjusting means for cooling the ink collecting means.
  • the fourth invention is characterized in that, in any one of the first to third inventions, the temperature adjusting means uses a single Peltier element.
  • a fifth invention is characterized in that, in any one of the first to fourth inventions, an apparatus main body for storing the ink container and the solvent recovery container is provided.
  • the solvent in the solvent gas is condensed by cooling the exhaust path of the solvent gas, and the condensate is recovered in a predetermined cooled container, so that the condensate can be prevented from volatilizing. it can. Further, since the recovered condensate is mixed with the ink being recovered and reused, it is possible to provide an ink jet recording apparatus that can reduce solvent consumption.
  • 1 is a perspective view showing an appearance of a first embodiment of an ink jet recording apparatus of the present invention. It is a schematic longitudinal cross-sectional view which shows the inside of the main body which comprises 1st Embodiment of the inkjet recording device of this invention.
  • 1 is a schematic configuration diagram showing a control circuit constituting a first embodiment of an ink jet recording apparatus of the present invention.
  • 1 is a configuration diagram illustrating an example of a flow path system for ink and solvent gas in a first embodiment of an inkjet recording apparatus of the present invention.
  • FIG. It is a longitudinal cross-sectional view which shows the condenser which comprises 1st Embodiment of the inkjet recording device of this invention.
  • FIG. 12 is a front view of the cooling block constituting the second embodiment of the ink jet recording apparatus of the present invention shown in FIG. 11 as viewed from the direction of arrows XII-XII. It is a side view which shows the cooling block which comprises 3rd Embodiment of the inkjet recording device of this invention.
  • FIG. 1 is a perspective view showing an external appearance of a first embodiment of an ink jet recording apparatus of the present invention.
  • the ink jet recording apparatus is formed into a pentagonal box shape when viewed from the side, and is formed into a rectangular long side view with a main body portion 600 containing a control circuit, an ink circulation system, and the like, and a stainless steel plate, for example.
  • a cable 620 that connects a main body 600 and the print head 610 with a nozzle for creating ink particles, electrodes for charging / deflecting ink particles, and the like, and stores an ink flow path and the like therein. And.
  • the main body 600 has a bottom surface portion made of a quadrangular plate member that forms the bottom of the housing, a back surface portion made of a quadrangular plate member that forms the back surface of the housing, and a pentagon that forms the left and right side surfaces of the housing. And a rectangular plate member bent into a square shape when viewed from the side, with the inclined surface on the upper side and the upright surface on the lower side, and the upper end of the front portion And a ceiling part that connects the upper end of the rear part.
  • An open / close door 670 is provided on the lower upright surface of the front portion to enable maintenance of components and the like stored therein.
  • a 10-inch touch panel type liquid crystal panel 630 is disposed on the upper inclined surface of the front portion, and it is possible to display and confirm the control contents of the ink jet recording apparatus, the apparatus operation status, etc. Printing specifications can be entered.
  • the print head 610 is provided with an opening 640 at the front end surface forming a long cylinder, and the ink particles are deflected and ejected from the opening 640 to a printing object to be described later.
  • FIG. 2 is a schematic longitudinal sectional view showing the inside of the main body constituting the first embodiment of the ink jet recording apparatus of the present invention.
  • the main body 600 is a partition plate 601 disposed in contact with the inner upper end of the upright surface of the front surface, the inner surface of the rear surface, and the inner surface of the side surface so as to be parallel to the bottom surface. It has.
  • An upper casing portion 600a is formed on the upper side of the partition plate 601, and a lower casing portion 600b is formed on the lower side.
  • a partition wall 685 for separating the front chamber 660 and the rear chamber 680 is disposed at a substantially center in the depth direction inside the lower housing 600b as shown in FIG.
  • the front chamber 660 stores the ink container 1 that stores ink to be supplied to the nozzle and the solvent storage container 16 that stores solvent to be supplied to the nozzle. By opening the door 670, ink and solvent can be supplied. Maintenance such as disposal can be easily performed.
  • circulation system control components such as a solenoid valve group 650 and a pump group 655 are disposed in a partition wall 685.
  • a part of the condenser 70 that cools the exhaust gas is provided on the rear chamber 680 side on the back surface of the main body 600 constituting the rear chamber 680, and the remaining part of the condenser 70 is provided outside.
  • the outer periphery of the remaining condenser 70 is covered with a cover 690.
  • the cable 620 is attached to the lower housing part 600b of the main body 600.
  • FIG. 3 is a schematic block diagram showing a control circuit constituting the first embodiment of the ink jet recording apparatus of the present invention.
  • reference numeral 300 denotes a central processing unit (hereinafter referred to as CPU) that controls the ink jet recording apparatus according to the present embodiment.
  • Reference numeral 310 denotes a read-only memory (hereinafter referred to as ROM) that stores programs and control data necessary for the CPU 300 to operate.
  • Reference numeral 305 denotes a rewritable memory (hereinafter referred to as RAM) that temporarily stores data handled by the CPU 300 during the execution of the program.
  • RAM rewritable memory
  • Reference numeral 380 denotes a bus line as a signal line including all data, an address signal, and a control signal from the CPU 300.
  • Reference numeral 315 denotes an interface circuit that mediates input / output of data, address signals, control signals, and the like.
  • the pump control circuit 320 controls operations of an ink supply pump 2 (see FIG. 4), an ink recovery pump 14 (see FIG. 4), a solvent supply pump 15 (see FIG. 4), etc., which will be described later, based on instructions from the CPU 300. .
  • the density detection circuit 335 performs operation control of ink density detection in an ink container 1 (see FIG. 4) described later based on a command from the CPU 300, and measures the ink density.
  • the solenoid valve control circuit 340 is configured to control a solenoid valve group 650 such as a supply valve 33 (see FIG. 4), a recovery valve 34 (see FIG. 4), a pressure relief valve 101 (see FIG. 4), which will be described later, based on a command from the CPU 300. Perform motion control.
  • the liquid level detection circuit 345 measures the liquid level position from liquid level sensors provided in the ink container 1 (see FIG. 4), the solvent storage container 16 (see FIG. 4), and the condenser 70 (see FIG. 4) described later.
  • the excitation source 370 generates an excitation signal based on the nozzle operation conditions, and drives a piezoelectric actuator (not shown) in the nozzle 6 (see FIG. 4).
  • the recording signal source 360 creates a recording signal for each ink particle and printing presence / absence information based on the inputted printing data, and then saves it in the RAM 305, and records the recording signal to the charging electrode 7 (see FIG. 4) based on a command from the CPU 300. Apply.
  • FIG. 4 is a block diagram showing an example of a flow path system of ink and solvent gas in the first embodiment of the ink jet recording apparatus of the present invention.
  • the same reference numerals as those shown in FIGS. 1 to 3 are the same or corresponding parts, and the description thereof is omitted.
  • the inflow or outflow of ink and solvent gas is caused by the ink supply flow path 21, the ink recovery flow path 22, the solvent gas first discharge flow path 26 ⁇ / b> A connected to the ink container 1, This is done through the road 24.
  • the solvent gas first discharge flow channel 26A and the pressure release flow channel 24 are configured as independent flow channels.
  • the stored solvent is supplied to the nozzle 6 via the switching valve 32 described later by the solvent pump 15 provided in the solvent supply flow path 23.
  • the solvent ejected from the nozzle 6 is taken into a gutter 11 which will be described later, and is recovered in the ink container 1 via the ink recovery channel 22.
  • the reason why the solvent is supplied to the nozzle 6 is to prevent the nozzle 6 from clogging due to the ink sticking, and the reason why the solvent is collected in the ink container 1 is to dilute the ink in the ink container 1.
  • an air release channel 25 that communicates from the gas phase part of the solvent storage container 16 to the outside of the main body part 600 is provided.
  • the ink supply channel 21 includes an ink container 1, an ink supply pump 2 that pumps ink, a supply valve 33 that is a two-way electromagnetic valve that opens and closes the channel, a filter 5, and a pressure regulating valve 3 that adjusts ink pressure.
  • a pressure gauge 4 for measuring the pressure of the supplied ink is connected in series in order, and the ink in the ink container 1 is supplied to the nozzle 6 through the switching valve 32 at a predetermined pressure.
  • the switching valve 32 is a three-way solenoid valve, and includes one inlet port to which the ink supply channel 21 is connected, the other inlet port to which the solvent supply channel 23 is connected, and an outlet port that is connected to the nozzle 6. Yes. By switching the port of the switching valve 32, either the ink or the solvent can be selectively switched and supplied to the nozzle 6.
  • the ink particles 8 ejected from the nozzle 6 are charged by the charging electrode 7 and then fly in the deflection electric field.
  • the deflection electric field is formed between the high-voltage electrode 9 to which a high voltage of 5 to 6 kV is applied and the ground electrode 10 that is grounded, and the charged ink particles 8A are deflected and fly according to the amount of charge. To do.
  • the charged ink particles 8A are ejected from the opening 640 of the print head 610, adhere to the print substrate 12, and printing is performed.
  • the ink particles 8B that are not used for printing are taken in by the gutter 11 and collected in the ink container 1 through the ink collection channel 22.
  • a gutter 11 In the ink recovery channel 22, a gutter 11, a recovery valve 34 that opens and closes the ink recovery channel, an ink recovery pump 14 that generates a negative pressure in the gutter 11, and a filter 13 that removes foreign matters mixed during the recovery of the ink are sequentially provided.
  • the ink and air that are connected in series and taken in by the gutter 11 are collected in the ink container 1.
  • the collection valve 34 is an electromagnetic two-way valve, and is opened only when collecting the ink, and closed otherwise. Since the gutter 11 sucks air and solvent gas in the print head 610 together with ink, the ink recovery flow path 22 is in a gas-liquid mixed state, and this gas-liquid mixture is recovered in the ink container 1.
  • the ink container 1 has a sufficient space in the gas-liquid mixture in which air or solvent gas and ink liquid can be separated.
  • the solvent gas moves above the ink liquid level 30 due to the density difference. That is, in the ink container 1, gas-liquid separation is performed on the ink containing the recovered gas.
  • the solvent gas can be removed from the solvent gas first discharge flow path 26A in which the inlet is installed above the ink liquid level 30, or the pressure release flow. Guided to path 24. Further, the ink collected in the ink container 1 is supplied to the nozzle 6 as described above via the ink supply channel 21 in which the inlet is provided below the ink liquid level 30.
  • the ink recovery pump 14 in the present embodiment is a diaphragm type pump having a capability of sucking at an air flow rate of 100 ml / min or more, and can recover the ink recovered by the gutter 11 to the ink container 1 without overflowing. it can.
  • a Teflon (registered trademark) tube having an inner diameter of 2 mm and a length of 2 to 6 m is used.
  • the depressurizing flow path 24 is arranged at one end side in the gas phase part above the ink liquid level 30 of the ink container 1 and provided with a depressurization valve 101 for opening and closing the flow path in the middle, and the other end side as the main body part. It is arranged so as to be exposed to the outside of 600.
  • a tube having an inner diameter of 2 mm and a length of 0.5 m is used for the pressure release channel 24.
  • the pressure release valve 101 is an electromagnetic two-way valve, and opens the solvent gas from the ink container 1 to the outside of the main body 600 through the pressure release flow path 24. On the other hand, the pressure release valve 101 is normally closed, and the solvent gas is supplied to a condenser 70 described later via a solvent gas first discharge passage 26A provided with a filter 27 for removing ink mist. Yes.
  • the solvent gas first discharge flow path 26 ⁇ / b> A connects the ink container 1 and the condenser 70.
  • the pressure relief valve 101 is opened to set the solvent gas first discharge flow path 26A to the atmospheric pressure, and the condenser. The supply of solvent gas to 70 is stopped. As a result, the inkjet recording apparatus can be operated while the condenser 70 is being maintained.
  • the pressure release valve 101 may be a flow rate adjusting valve having a flow rate adjusting function.
  • the flow rate ratio of the solvent gas flowing through the pressure release channel 24 and the solvent gas first discharge channel 26A can be adjusted.
  • the solvent gas second discharge passage 26B shown in FIG. 4 discharges the solvent gas discharged from the condenser 70 to the outside of the apparatus.
  • the solvent gas first and second discharge passages 26A and 26B are constituted by, for example, tubes.
  • the inner diameter of the tube is more than 3 mm, the liquid that has entered the tube tends to accumulate, which is likely to cause clogging.
  • the inner diameter is less than 0.5 mm, the flow path resistance increases, and a large pressure is required to flow the condensate. Therefore, in the present embodiment, a tube having an inner diameter of 1 mm and a length of 2 to 6 m is used for the solvent gas first and second discharge flow paths 26A and 26B.
  • the condenser 70 separates and cools the condensed solvent (hereinafter referred to as condensate) and the solvent gas flowing in from the solvent gas first discharge passage 26A.
  • the separated solvent gas is sent to the solvent gas second discharge flow path 26B and discharged outside the apparatus.
  • the condensate is stored in a tank in the condenser 70 and when it reaches a predetermined amount, it is sent to the ink recovery channel 22 through the condensate supply channel 40 and is transferred to the ink container 1 via the ink recovery channel 22. Collected.
  • the condensate supply flow path 40 has one end connected to the condenser 70, a two-way electromagnetic valve 41 and a throttle 42 provided in the middle, and the other end connected to the ink recovery flow path 22.
  • the two-way electromagnetic valve 41 By the opening operation of the two-way electromagnetic valve 41, the negative pressure of the ink recovery pump 14 acts through the throttle 42, so that the condensate stored in the condenser 70 is recovered in the ink container 1.
  • the diaphragm 42 is formed with an inner diameter of 0.3 mm, for example.
  • FIG. 5 is a longitudinal sectional view showing a condenser constituting the first embodiment of the ink jet recording apparatus of the present invention.
  • the same reference numerals as those shown in FIGS. 1 to 4 are the same or corresponding parts, and the description thereof is omitted.
  • the condenser 70 includes a cooling block 75 that cools and stores condensate and solvent gas, a Peltier element 71 that cools the cooling block 75, a heat insulating material 76 that covers the cooling block 75 and the Peltier element 71, and a Peltier element 71 A fin 73 that removes heat, a fan 74 that air-cools the fin 73, and a cover 690 that protects the fin 73 and the fan 74 are provided.
  • a tank 78 (solvent recovery container) is provided as a space for storing a solvent gas and a condensate that is a condensed solvent.
  • the Peltier element 71 is arranged so that its cooling surface is in contact with the cooling block 75 and its heating surface (opposite to the cooling surface) is in contact with the inside of the main body 600.
  • the Peltier element 71 used in the present embodiment can cool the cooling block 75 to ⁇ 10 ° C. when the ambient environment temperature is 20 ° C., and is included in the solvent gas supplied from the solvent gas first discharge flow path 26A.
  • the solvent can be condensed and liquefied.
  • the fin 73 is made of aluminum and has a flat surface portion and a comb tooth portion.
  • the flat portion of the fin 73 is fixed so as to contact the outer side of the main body 600 corresponding to the inner side of the main body 600 with which the heating surface of the Peltier element 71 contacts.
  • the fan 74 is always rotated, and air is cooled to the fin 73 by sending ambient air to the comb tooth portion of the fin 73.
  • the heat from the Peltier element 71 is transferred from the inner side of the main body 600 to the outer side, but the heat from the Peltier element 71 is removed by cooling the outer side of the main body 600 by the fans 74 and the fins 73.
  • the cooling block 75 is, for example, a stainless steel container, and the solvent gas first and second discharge passages 26A and 26B and the condensate supply passage 40 are connected to the inside of the tank 78 from the outside.
  • the tube end of the solvent gas second discharge flow path 26 B is disposed at the uppermost position of the tank 78, and the tube end of the condensate supply flow path 40 is one of the tank 78.
  • the tube end of the solvent gas first discharge flow path 26A is arranged in the middle.
  • the heat insulating material 76 is for insulating the Peltier element 71 and the cooling block 75 from the surrounding air, and for example, polyurethane foam foamed plastic may be used.
  • the condenser 70 includes a float-type liquid level sensor (not shown) that can detect the liquid level 77 of the condensate stored in the tank 78.
  • the liquid level 77 detected by the liquid level sensor controls the opening and closing of the two-type electromagnetic valve 41 (FIG. 4) provided in the condensate supply flow path 40. Specifically, when the liquid level 77 exceeds a predetermined height (first level) of the solvent gas, the two-type solenoid valve 41 is opened, and the liquid level 77 falls below the predetermined height (second level). The two-way solenoid valve 41 is closed at the time.
  • the first level is an intermediate position between the tube end of the solvent gas first discharge flow path 26A and the tube end of the solvent gas second discharge flow path 26B, and the second level is the solvent supply flow path 40.
  • An intermediate position between the tube end and the tube end of the solvent first gas discharge channel 26A is set.
  • the cover 690 is fixed to the outside of the main body 600 via a sealing material 685.
  • air holes 681 are provided in the upper and lower portions of the governor 690, respectively.
  • the solvent gas flowing into the condenser 70 from the solvent gas first discharge flow path 26A is cooled, the solvent in the solvent gas is condensed, and is stored in the tank 78 as a condensate. . Accordingly, the solvent gas is discharged from the solvent gas second discharge flow path 26B while reducing the amount of solvent contained therein. Since the stored condensate is in the cooled cooling block 75, it does not re-volatilize.
  • the two-type electromagnetic valve 41 is opened, and the condensate passes from the condensate supply channel 40 through the ink recovery channel 22.
  • the ink is supplied to the ink container 1 and reused.
  • the solvent in the solvent gas is condensed by cooling the exhaust path of the solvent gas, and the predetermined container 78 in which the condensed liquid is cooled.
  • the condensate can be prevented from volatilizing.
  • the recovered condensate is mixed with the ink being recovered and reused, it is possible to provide an ink jet recording apparatus that can reduce solvent consumption.
  • the solvent may be supplied directly from the solvent storage container 16 to the ink container 1 by connecting the solvent supply channel 23 shown in FIG. 4 to the ink container 1. Further, the communication side of the atmosphere opening flow path 25 with the outside of the main body 600 may be connected to the gas phase side of the ink container 1. In this case, the solvent gas generated in the solvent storage container 16 can be discharged out of the main body portion 600 through the pressure release channel 24.
  • the filter 27 is provided in the solvent gas first discharge flow path 26A, but the present invention is not limited to this. For example, you may provide only in the solvent gas 2nd discharge flow path 26B.
  • FIG. 6 is a block diagram showing another example of the ink and solvent gas flow path system in the first embodiment of the ink jet recording apparatus of the present invention
  • FIG. 7 shows the first embodiment of the ink jet recording apparatus of the present invention
  • FIG. 8 shows another example of the ink and solvent gas flow path system in the first embodiment of the ink jet recording apparatus of the present invention. It is a block diagram. 6 to 8, the same reference numerals as those shown in FIGS. 1 to 5 are the same or corresponding parts, and the description thereof is omitted.
  • the tip of the solvent gas second discharge flow path 26B is arranged outside the apparatus.
  • the solvent gas is again sucked by the gutter 11 and collected in the ink container 1. Further, since the pressure inside the print head 610 increases, impurities can be prevented from entering from the print head opening 640.
  • the condensate stored in the tank 78 of the condenser 70 is transferred from the condensate supply channel 40 to the ink container 1 via the ink recovery channel 22, but FIG.
  • a two-way solenoid valve 52 and a pump 53 are provided in the condensate supply flow path 50 that connects the condenser 70 and the ink container 1, and the two-way solenoid valve 52 is opened to store in the condenser 70.
  • the condensate may be transferred to the ink container 1 by the pump 53.
  • the ink container 1 can be replenished with the condensate at regular intervals, such as two hours, regardless of the position of the liquid level 77 of the stored condensate.
  • a liquid level sensor for detecting the liquid level 77 can be eliminated.
  • the condensate stored in the condenser 70 may be transferred not to the ink container 1 but to the solvent storage container 16 as shown in FIG.
  • a two-way solenoid valve 52 is provided in the condensate supply flow path 60 that connects the condenser 70 and the solvent storage container 16. Further, the condenser 70 and the solvent storage container 16 are arranged so that the liquid level of the condensate collected in the condenser 70 is higher than the solvent liquid level in the solvent storage container 16.
  • FIG. 9 is a block diagram showing an example of the ink and solvent gas flow path system in the second embodiment of the ink jet recording apparatus of the present invention
  • FIG. 10 shows the second embodiment of the ink jet recording apparatus of the present invention
  • FIG. 11 is a side view showing a cooling block constituting the second embodiment of the ink jet recording apparatus of the present invention
  • FIG. 12 is a diagram of the ink jet recording apparatus of the present invention shown in FIG.
  • FIG. 7 is a front view of a cooling block constituting the second embodiment as viewed from the direction of arrows XII-XII. 9 to 12, since the same reference numerals as those shown in FIGS. 1 to 8 are the same parts, detailed description thereof will be omitted.
  • the second embodiment of the ink jet recording apparatus of the present invention shown in FIG. 9 is composed of almost the same equipment as the first embodiment, but differs in the following construction.
  • the ink recovery channel 22 directly connects the gutter 11 and the recovery valve 34 on the upstream side of the recovery pump 14, but in this embodiment, as shown in FIG.
  • the ink recovery flow path 22 is configured to pass through the condenser 70 on the upstream side of the recovery pump 14.
  • the mode of the ink recovery flow path 22 that passes through the condenser 70 is to cool a part of the flow path by communicating with the cooling flow path inside the cooling block 75 as shown in FIG.
  • the portion of the ink recovery channel 22 that communicates with the cooling channel inside the cooling block 75 is not limited to the upstream side of the recovery pump 14. Any ink recovery flow path 22 may be used. For example, it may be downstream of the recovery pump 14.
  • the cooling block 75 includes a recovery block 80 through which condensate and solvent gas pass, and a flow path block 83 through which ink and solvent gas flow through the ink recovery flow path 22.
  • the collection block 80 and the flow path block 83 are each formed in a cubic shape, and are arranged so that the surfaces of each other are in contact with each other. As a result, the amount of heat can be moved from the flow path block 83 to the recovery block 80.
  • the Peltier element 71 is attached to the opposite surface (arrow A side in the figure) of the attachment surface of the flow path block 83.
  • the recovery block 80 includes a tank 78 as a space through which condensate is stored and solvent gas passes, and a plate 81 that is disposed above the tank 78 and covers and closes the tank 78.
  • the plate 81 is screwed to the recovery block 80 via a seal 88 so that the solvent gas and condensate in the tank 78 do not leak.
  • the plate 81 is provided with three joints 85A to 85C for connecting the solvent gas first discharge channel 26A, the solvent gas second release channel 26B, and the condensate supply channel 40. Inflow and outflow of the solvent gas and the condensate into the tank 78 are performed through these joints 85A to 85C.
  • the front surface (right side surface in FIG. 11) of the flow path block 83 is attached to the back surface (left side surface in FIG. 11) of the recovery block 80 via a seal 89.
  • the channel block 83 includes a cooling channel 82 described later.
  • FIG. 12 is a view of the flow path block 83 as viewed from the attachment side of the recovery block 80.
  • a meandering cooling channel 82 having a width of 2 mm and a depth of 2 mm is provided in the center of the channel block 83 to allow the ink and solvent gas flowing through the ink recovery channel 22 to flow.
  • An inlet joint 86A and an outlet joint 86B are provided at the inlet / outlet of the cooling channel 82, and the ink recovery channel 22 and each are connected to each other.
  • the seal groove 87 is a groove for laying the seal 89 when being placed in contact with the back surface of the recovery block 80 and is formed so as to surround the periphery of the cooling channel 82.
  • the holes 90 provided at the four corners are screw holes for fixing the flow path block 83 to the back surface of the recovery block 80.
  • the ink and solvent gas cooled by the condenser 70 flows into the ink container 1, so that the volatilization of the solvent in the ink container 1 is suppressed, and the exhaust gas from the ink container 1 is exhausted.
  • the amount of solvent can be reduced.
  • the pressure release channel 24 may be opened and exhausted.
  • the ink and solvent gas cooled by the condenser 70 flows into the ink container 1, the solvent volatilization in the ink container 1 occurs. Is suppressed, and solvent consumption can be further reduced.
  • FIG. 13 is a side view showing a cooling block constituting the third embodiment of the ink jet recording apparatus of the present invention
  • FIG. 14 shows an example of a condenser constituting the third embodiment of the ink jet recording apparatus of the present invention
  • FIG. 15 is a longitudinal sectional view showing another example of the condenser constituting the third embodiment of the ink jet recording apparatus of the present invention.
  • the third embodiment of the ink jet recording apparatus of the present invention shown in FIGS. 13 to 15 is composed of devices similar to those of the second embodiment, except for the following configurations.
  • the Peltier element 71 constituting the condenser 70 is attached to the opposite surface (the arrow A side in FIG. 13) of the attachment surface of the flow path block 83, but in this embodiment, As shown in FIG. 13, a Peltier element 71 is attached to the lower part of the cooling block 75 so as to straddle the lower part of the flow path block 83 and the lower part of the recovery block 80.
  • the Peltier element 71 is attached to the lower part of the cooling block 75, the fins 73 and the fan 74 constituting the condenser 70 do not pass through the main body 600, but through the heat insulating material 76. Is in contact with. For this reason, the whole condenser 70 can also be arrange
  • FIG. FIG. 14 shows a case where the entire condenser 70 is arranged outside the main body 600
  • FIG. 15 shows a case where the entire condenser 70 is arranged inside the main body 600.
  • the present invention is not limited to this.
  • the Peltier element may be omitted and only the fin and the fan may be provided.

Landscapes

  • Ink Jet (AREA)
  • Coating Apparatus (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

La présente invention se rapporte à un dispositif d'enregistrement à jet d'encre qui permet d'obtenir une réduction dans la consommation de solvant en empêchant le composant solvant d'encre de volatiliser à nouveau après condensation. Un dispositif d'enregistrement à jet d'encre comprend : (610) une tête d'impression d'un objet à imprimer (12); un récipient d'encre (1) pour stocker de l'encre (8) contenant un solvant; un moyen d'alimentation en encre (21) pour alimenter l'encre (8) dans le récipient d'encre (1) à la tête d'impression (610); et un moyen de collecte d'encre (22) pour collecter, dans le récipient d'encre (1), l'encre (8B) qui n'a pas été utilisé pour l'objet à être imprimé (12) par la tête d'impression (610), et est prévu avec : un trajet d'écoulement de libération (26a, 26B) de libération de gaz du solvant dans le récipient d'encre à l'extérieur de la cartouche d'encre; un récipient de collecte des solvants (70) pour recueillir le solvant à partir du gaz dans le trajet d'écoulement de libération; et un moyen de réglage de température pour refroidir le récipient de collecte des solvants (70).
PCT/JP2012/080664 2012-04-05 2012-11-28 Dispositif d'enregistrement à jet d'encre WO2013150682A1 (fr)

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JP2012-086729 2012-04-05
JP2012086729A JP2013215929A (ja) 2012-04-05 2012-04-05 インクジェット記録装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015085513A (ja) * 2013-10-28 2015-05-07 株式会社日立産機システム インクジェット記録装置
US20170173961A1 (en) 2015-12-22 2017-06-22 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
GB2551156A (en) * 2016-06-07 2017-12-13 Linx Printing Tech Ink jet printer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201510456D0 (en) * 2015-06-15 2015-07-29 Videojet Technologies Inc Apparatus for printing
JP6763628B1 (ja) * 2020-04-24 2020-09-30 紀州技研工業株式会社 インクジェットプリンタ

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JPH07125256A (ja) * 1992-03-12 1995-05-16 Hitachi Ltd インクジェット記録装置
JP2005212350A (ja) * 2004-01-30 2005-08-11 Ricoh Co Ltd 液吐出装置及びインクジェット記録装置
JP2009202583A (ja) * 2008-01-28 2009-09-10 Hitachi Industrial Equipment Systems Co Ltd インクジェット記録装置

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH07125256A (ja) * 1992-03-12 1995-05-16 Hitachi Ltd インクジェット記録装置
JP2005212350A (ja) * 2004-01-30 2005-08-11 Ricoh Co Ltd 液吐出装置及びインクジェット記録装置
JP2009202583A (ja) * 2008-01-28 2009-09-10 Hitachi Industrial Equipment Systems Co Ltd インクジェット記録装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015085513A (ja) * 2013-10-28 2015-05-07 株式会社日立産機システム インクジェット記録装置
US20170173961A1 (en) 2015-12-22 2017-06-22 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
FR3045458A1 (fr) * 2015-12-22 2017-06-23 Dover Europe Sarl Imprimante a jet d'encre a circuit de recuperation de solvant ameliore
EP3225405A1 (fr) * 2015-12-22 2017-10-04 Dover Europe Sàrl Imprimante à jet d'encre avec circuit amélioré de récupération de solvant
US10442204B2 (en) 2015-12-22 2019-10-15 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
GB2551156A (en) * 2016-06-07 2017-12-13 Linx Printing Tech Ink jet printer
US10661561B2 (en) 2016-06-07 2020-05-26 Linx Printing Technologies Ltd. Inkjet printer
GB2551156B (en) * 2016-06-07 2020-12-30 Linx Printing Tech Inkjet printer

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