WO2023167181A1 - Inkjet printer - Google Patents

Inkjet printer Download PDF

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Publication number
WO2023167181A1
WO2023167181A1 PCT/JP2023/007282 JP2023007282W WO2023167181A1 WO 2023167181 A1 WO2023167181 A1 WO 2023167181A1 JP 2023007282 W JP2023007282 W JP 2023007282W WO 2023167181 A1 WO2023167181 A1 WO 2023167181A1
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WO
WIPO (PCT)
Prior art keywords
treatment liquid
ink
recording medium
recording head
wettability
Prior art date
Application number
PCT/JP2023/007282
Other languages
French (fr)
Japanese (ja)
Inventor
泰仁 藤田
猛 八木
佳彦 赤尾
Original Assignee
ローランドディー．ジー．株式会社
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 ローランドディー．ジー．株式会社 filed Critical ローランドディー．ジー．株式会社
Publication of WO2023167181A1 publication Critical patent/WO2023167181A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet

Definitions

  • the present invention relates to inkjet printers.
  • a printing method that uses a treatment liquid that reacts with ink has been known for some time.
  • the fluidity of the entire ink is reduced by chemically reacting or physically adsorbing a coloring agent, resin, etc., which are part of the composition that constitutes the colored ink.
  • An image recording apparatus is disclosed that applies a treatment liquid to a transfer drum that causes a .
  • ink containing a coloring agent is ejected onto the transfer drum after the treatment liquid has been applied. According to Japanese Patent Application Laid-Open No. 2002-200012, this reduces the fluidity of the ink on the transfer drum, thereby forming a good image.
  • Patent Document 1 discloses that the amount of treatment liquid ejected per nozzle is smaller than the amount of ink ejected per nozzle. According to Patent Document 1, this makes the density of the treatment liquid dots higher than the density of the ink dots, and increases the probability that the ink and the treatment liquid will meet even if the landing position of the ink or the treatment liquid is shifted. , and
  • Patent Document 1 if the ejection amount of the treatment liquid per nozzle is reduced without changing the ejection amount of the treatment liquid, the probability that the ink and the treatment liquid meet increases.
  • the amount of treatment liquid that can sufficiently fix a predetermined amount of ink on the recording medium varies depending on the characteristics of the recording medium, and the ink cannot be sufficiently fixed only by increasing the probability that the ink and the treatment liquid meet. There are cases.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide an inkjet printer that ejects a treatment liquid that reacts with ink to fix the ink on a recording medium, and that sufficiently supplies the ink regardless of the recording medium.
  • An object of the present invention is to provide an ink jet printer capable of fixing on a recording medium.
  • the inkjet printer disclosed herein includes a first recording head that ejects a treatment liquid that fixes the ink on the recording medium by reacting with the ink, and a second recording head that ejects the ink onto the recording medium. and a control device that controls the first recording head and the second recording head.
  • the control device includes a media selection section, a storage section, a calculation section, a treatment liquid ejection section, and an ink ejection section.
  • the media selection unit is configured to be able to select one rank from among predetermined ranks regarding the ink wettability of the recording medium.
  • the storage unit stores a table in which the ink wettability rank of the recording medium and the ejection density of the treatment liquid ejected by the first recording head are associated with each other.
  • the calculation unit calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium selected by the medium selection unit and the table.
  • the treatment liquid ejection section controls the first recording head to eject the treatment liquid onto the recording medium at the ejection density calculated by the calculation section.
  • the ink ejection section controls the second recording head to eject the ink so as to overlap the treatment liquid that has landed on the recording medium.
  • the discharge density of the treatment liquid is calculated according to the ink wettability of the recording medium based on the stored table. Since the degree of wetting and spreading of the treatment liquid on the recording medium also changes according to the ink wettability of the recording medium, according to this inkjet printer, the discharge density of the treatment liquid can be adjusted according to the degree of wetting and spreading of the treatment liquid on the recording medium. can be adjusted. As a result, the ink can be sufficiently fixed on the recording medium regardless of the recording medium.
  • FIG. 1 is a front view of an inkjet printer according to one embodiment;
  • FIG. FIG. 3 is a plan view schematically showing the configuration of the lower surface of the carriage;
  • 1 is a block diagram of a printer;
  • FIG. It is a figure which shows an example of a table.
  • 4 is a flow chart showing an example of printing using a treatment liquid;
  • FIG. 4 is a schematic diagram of dots of the treatment liquid and ink when the treatment liquid is ejected using one treatment liquid nozzle row.
  • FIG. 4 is a schematic diagram of treatment liquid and ink dots when the treatment liquid is ejected using a plurality of treatment liquid nozzle rows.
  • FIG. 1 is a front view of a large format inkjet printer (hereinafter referred to as "printer") 10 according to one embodiment.
  • the printer 10 moves the roll-shaped recording medium 5 in the front-rear direction, and the treatment liquid is transferred from the first recording head 50 mounted on the carriage 20 that moves in the left-right direction to the second recording head also mounted on the carriage 20 .
  • An image is formed on the recording medium 5 by ejecting ink from 60 .
  • the moving direction of the carriage 20 is also referred to as the scanning direction Y
  • the moving direction of the recording medium 5 is also referred to as the transport direction X (see FIG. 2).
  • the scanning direction Y is the horizontal direction here.
  • the transport direction X here is the front-rear direction.
  • the scanning direction Y and the transporting direction X are orthogonal.
  • an upstream side X1 and a downstream side X2 in the printing direction are set (see FIG. 2).
  • the recording medium 5 is conveyed from the upstream side X1 toward the downstream side X2 in the conveying direction X during printing.
  • the upstream side X1 in the transport direction X is the rear side.
  • the downstream side X2 in the transport direction X is the front side.
  • the treatment liquid is a liquid that fixes the ink to the recording medium 5 by increasing the viscosity of the ink or by aggregating and insolubilizing the coloring material.
  • the treatment liquid is also called optimizer ink.
  • the processing liquid is here a transparent liquid.
  • the treatment liquid is obtained by dissolving a reaction component in water, and is fixed on the recording medium 5 by evaporating water.
  • the treatment liquid is not limited to those described above, and may be, for example, a solution in which the reaction components are dissolved in a solvent other than water.
  • the inks ejected from the second recording head 60 are water-based CMYK inks here. However, the type and color of ink ejected from the second recording head 60 are not particularly limited.
  • the ink ejected from the second recording head 60 reacts with the treatment liquid to cause thickening or agglomeration/insolubilization of the coloring material, and is fixed on the recording medium 5 by evaporating water.
  • the recording medium 5 is an object on which an image is printed.
  • the recording medium 5 is not particularly limited.
  • the recording medium 5 may be, for example, paper such as plain paper or inkjet printing paper, or may be a transparent sheet made of resin, glass, or the like. A sheet made of metal, rubber, or the like may be used. Also, it may be a cloth.
  • the recording medium 5 has different ink wettability depending on its material and surface treatment.
  • the term "ink wettability" means the ease with which the ink that has landed spreads out. When the ink wettability of the recording medium 5 is high, the ink tends to wet and spread on the recording medium 5 .
  • the ink wettability of the recording medium 5 is low, the ink is less likely to wet and spread on the recording medium 5 .
  • the wettability of the treatment liquid also differs depending on the recording medium 5 .
  • the recording medium 5 having low wettability with ink has low wettability with the treatment liquid, and the recording medium 5 with high wettability with ink has high wettability with the treatment liquid.
  • the recording medium 5 easily absorbs the ink and the treatment liquid, the wettability of the ink and the treatment liquid is low.
  • the recording medium 5 does not absorb the ink and the treatment liquid easily or does not absorb the ink and the treatment liquid, the wettability of the ink and the treatment liquid varies depending on the recording medium 5 .
  • the printer 10 includes a first recording head 50, a second recording head 60, a carriage 20 that holds the first recording head 50 and the second recording head 60, and the carriage 20 in the scanning direction Y. It includes a carriage moving device 30 for moving, a conveying device 40 for moving the recording medium 5 in the conveying direction X, a heating device 70 for drying ink and treatment liquid, and a control device 100 .
  • the carriage moving device 30 includes a guide rail 31, a belt 32, left and right pulleys 33a and 33b, and a carriage motor .
  • the carriage 20 is slidably engaged with the guide rails 31 .
  • the guide rail 31 extends in the scanning direction Y.
  • the guide rail 31 guides the movement of the carriage 20 in the scanning direction Y.
  • Belt 32 is fixed to carriage 20 .
  • the belt 32 is an endless belt.
  • the belt 32 is wound around a pulley 33a provided on the right side of the guide rail 31 and a pulley 33b provided on the left side.
  • a carriage motor 34 is attached to the right pulley 33a.
  • Carriage motor 34 is electrically connected to control device 100 .
  • Carriage motor 34 is controlled by control device 100 .
  • the pulley 33a rotates and the belt 32 runs. Thereby, the carriage 20 moves in the scanning direction Y along the guide rails 31 .
  • a platen 12 is arranged below the carriage 20 .
  • the platen 12 extends in the scanning direction Y and the transporting direction X.
  • a recording medium 5 is placed on the platen 12 .
  • the conveying device 40 moves the recording medium 5 on the platen 12 in the conveying direction X.
  • the conveying device 40 includes a pinch roller 41 , a grit roller 42 and a feed motor 43 .
  • a pinch roller 41 is provided above the platen 12 and presses down the recording medium 5 from above.
  • the pinch roller 41 is arranged behind the carriage 20 .
  • a grit roller 42 is provided on the platen 12 .
  • the grit roller 42 is arranged below the pinch roller 41 .
  • the grit roller 42 is provided at a position facing the pinch roller 41 .
  • the grit roller 42 is connected to the feed motor 43 .
  • the grit roller 42 is rotatable by receiving the driving force of the feed motor 43 .
  • Feed motor 43 is electrically connected to control device 100 .
  • Feed motor 43 is controlled by control device 100 .
  • the heating device 70 is embedded in the platen 12.
  • the heating device 70 dries the ink and treatment liquid that have landed on the recording medium 5 by heating the platen 12 .
  • the heating device 70 includes a heater for heating the platen 12 here.
  • the configuration of the heating device 70 is not particularly limited.
  • the heating device 70 may include, for example, a hot air generator that blows hot air onto the recording medium 5 .
  • the heating device 70 may be provided above the platen 12 and configured to directly heat the recording medium 5 .
  • FIG. 2 is a plan view schematically showing the structure of the lower surface of the carriage 20.
  • the printer 10 includes a first recording head 50 that ejects treatment liquid onto the recording medium 5 and a second recording head 60 that ejects ink onto the recording medium 5.
  • the first recording head 50 is arranged on the upstream side X ⁇ b>1 in the transport direction X from the second recording head 60 and on the right side of the second recording head 60 .
  • the first recording head 50 and the second recording head 60 are separated so as not to share the nozzle surface where the nozzles are formed. good.
  • the first recording head 50 is provided with nozzles for ejecting treatment liquid
  • the second recording head 60 is provided with nozzles for ejecting ink. It is not particularly limited whether it is connected or integrated.
  • the first recording head 50 includes a plurality of processing liquid nozzle rows 51 to 54 each having a plurality of nozzles for ejecting processing liquid.
  • the number of processing liquid nozzle rows is not particularly limited.
  • a plurality of processing liquid nozzle rows 51 to 54 are arranged side by side in the scanning direction Y.
  • the plurality of treatment liquid nozzle rows 51 to 54 are arranged from the right side to the right: a first treatment liquid nozzle row 51, a second treatment liquid nozzle row 52, a third treatment liquid nozzle row 53, and a fourth treatment liquid nozzle row. Also called column 54 .
  • the treatment liquid first nozzle row 51 includes a plurality of nozzles 51a arranged in the transport direction X. As shown in FIG.
  • the processing liquid second nozzle array 52 includes a plurality of nozzles 52a arranged in the transport direction X.
  • the treatment liquid third nozzle row 53 includes a plurality of nozzles 53a arranged in the transport direction X.
  • the fourth treatment liquid nozzle row 54 includes a plurality of nozzles 54a arranged in the transport direction X. As shown in FIG.
  • the second recording head 60 has a plurality of ink nozzle rows 61 to 64 each having a plurality of nozzles for ejecting ink.
  • a plurality of ink nozzle rows 61 to 64 are arranged side by side in the scanning direction Y. As shown in FIG.
  • the ink nozzle rows 61 to 64 eject cyan ink, magenta ink, yellow ink, and black ink, respectively.
  • the cyan ink nozzle row 61, the magenta ink nozzle row 62, the yellow ink nozzle row 63, and the black ink nozzle row 64 are also referred to as call.
  • the cyan ink nozzle row 61 is arranged in the transport direction X and includes a plurality of nozzles 61a for ejecting cyan ink.
  • the magenta ink nozzle row 62 is arranged in the transport direction X and includes a plurality of nozzles 62a that each eject magenta ink.
  • the yellow ink nozzle row 63 is arranged in the transport direction X and includes a plurality of nozzles 63a for ejecting yellow ink.
  • the black ink nozzle row 64 is arranged in the transport direction X and includes a plurality of nozzles 64a for ejecting black ink.
  • the order in which the plurality of ink nozzle rows 61 to 64 are arranged is not particularly limited.
  • the plurality of treatment liquid nozzle rows 51-54 are provided on the upstream side X1 in the transport direction X from the plurality of ink nozzle rows 61-64.
  • the first recording head 50 and the second recording head 60 overlap in the transport direction X to the extent that the treatment liquid nozzle rows 51 to 54 and the ink nozzle rows 61 to 64 do not overlap in the transport direction X. It should be noted that the first recording head 50 and the second recording head 60 do not have to overlap each other in the transport direction X at all. In that case, the first recording head 50 and the second recording head 60 may be aligned in the scanning direction Y and arranged side by side in the transporting direction X. FIG.
  • the positional relationship between the first recording head 50 and the second recording head 60 is not particularly limited as long as the treatment liquid lands on the recording medium 5 before the ink and the time for the treatment liquid to spread is ensured.
  • the first recording head 50 and the second recording head 60 may be aligned in the transport direction X. Even in such a case, for example, the treatment liquid can be ejected before the ink by ejecting the treatment liquid on the forward path of the movement of the carriage 20 and the ink on the return path.
  • the processing liquid is discharged. It can be ejected before the ink.
  • an operation panel 120 is provided at the right end of the printer 10. As shown in FIG. 1, the operation panel 120 is provided with a display section for displaying device status, input keys operated by the user, and the like. Operation panel 120 is connected to control device 100 .
  • FIG. 3 is a block diagram of the printer 10 according to this embodiment.
  • the control device 100 is electrically connected to the carriage motor 34, the feed motor 43, the first recording head 50, the second recording head 60, and the heating device 70, respectively. is configured to be controllable.
  • the configuration of the control device 100 is not particularly limited.
  • the control device 100 is, for example, a microcomputer.
  • the hardware configuration of the microcomputer is not particularly limited. processing unit), ROM (read only memory) that stores programs executed by the CPU, RAM (random access memory) that is used as a working area for developing programs, and memory that stores the above programs and various data a storage device;
  • the control device 100 does not necessarily have to be provided inside the printer 10.
  • the control device 100 may be a computer or the like installed outside the printer 10 and connected to the printer 10 via a wire or wirelessly so as to be communicable. good too.
  • the control device 100 includes a droplet control unit 101, a media selection unit 102, an image quality selection unit 103, a condition storage unit 104, a calculation unit 105, a treatment liquid ejection unit 106, an ink It has a discharge section 107 , a scanning control section 108 , a transport control section 109 and a temperature control section 110 .
  • the droplet control unit 101 controls droplet sizes of treatment liquid and ink.
  • the droplet control unit 101 is configured to be able to adjust the droplet size of the treatment liquid and ink to a plurality of sizes.
  • the types of droplet sizes are not particularly limited, they are small dots, medium dots, and large dots here.
  • the droplet control unit 101 applies part or all of the drive signals capable of forming droplets of small dots, medium dots, and large dots to the actuators of the first recording head 50 and the second recording head 60. to control the droplet size.
  • the droplet control unit 101 forms droplets of small dots by, for example, applying part of the drive signal to each actuator of the first recording head 50 and the second recording head 60 .
  • the droplet control unit 101 further applies another part of the drive signal to the actuators of the first recording head 50 and the second recording head 60 to form medium-dot droplets.
  • the droplet control unit 101 applies another part of the drive signal to the actuators of the first recording head 50 and the second recording head 60 to form large dot droplets.
  • the media selection unit 102 is configured to be able to select one rank from among predetermined ranks regarding ink wettability of the recording medium 5 .
  • the rank regarding the ink wettability of the recording medium 5 is composed of three levels of "high wettability", “medium wettability”, and “low wettability”.
  • the user alternatively selects the wettability rank of the recording medium 5 via the operation screen.
  • the media selection unit 102 may cause the operation panel 120 to display the selection screen, or may cause the computer or the like connected to the printer 10 to display the selection screen.
  • the medium selection unit 102 is configured to select the type of the recording medium 5 (for example, recording paper, vinyl chloride, etc.), and obtains the ink wettability rank of the recording medium 5 from the selected type of the recording medium 5.
  • the medium selection unit 102 selects the type of the recording medium 5 (for example, recording paper, vinyl chloride, etc.), and obtains the ink wettability rank of the recording medium 5 from the selected type of the recording medium 5.
  • selecting the wettability rank of the recording medium 5" thus includes selecting the ink wettability rank of the recording medium 5 through selection of the recording medium 5 type.
  • the image quality selection unit 103 is configured to be able to select one image quality from a plurality of predetermined image qualities. Although the configuration of the plurality of image quality is not particularly limited, here, it is configured in three stages of "high quality mode", "standard mode", and "high speed mode".
  • the high quality mode is a mode with high resolution and good print quality, but the print speed is slow.
  • the high speed mode is a low resolution print mode, and the print speed is fast.
  • Standard mode is an intermediate mode between high quality mode and high speed mode. In standard mode the resolution is lower than in high quality mode and higher than in high speed mode. In standard mode, the print speed is faster than in high quality mode and slower than in high speed mode.
  • the image quality selection unit 103 may cause the operation panel 120 to display the selection screen, or may cause the computer or the like connected to the printer 10 to display the selection screen.
  • the condition storage unit 104 stores a table T1 in which the ink wettability rank of the recording medium 5 and the ejection density of the treatment liquid ejected by the first recording head 50 are linked.
  • FIG. 4 is a diagram showing an example of the table T1.
  • the table T1 associates the matrix of the ink wettability rank and the image quality of the recording medium 5 with the ejection density of the treatment liquid ejected by the first recording head 50. ing.
  • the table T1 only needs to associate the ink wettability rank of the recording medium 5 with the ejection density of the treatment liquid ejected by the first recording head 50. may not be linked.
  • the “treatment liquid ejection density” means the amount of treatment liquid ejected per predetermined area on the recording medium 5 .
  • the droplet size of the treatment liquid is only small dots, so the “discharge density of the treatment liquid” means the ratio of pixels onto which small dots of the treatment liquid are discharged. good too.
  • the ejection density when a small dot of the treatment liquid lands once on every pixel in the ejection range of the treatment liquid is referred to as an ejection density of 100%.
  • the number of the processing liquid nozzle rows 51 to 54 for discharging the processing liquid is set as the processing liquid discharge density.
  • the table T1 sets the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid to "1" when the ink wettability of the recording medium 5 is high and the image quality is in the high image quality mode.
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "1".
  • the image quality selectable by the image quality selection unit 103 includes a high-speed mode and other modes (here, standard mode and high-quality mode) whose printing speed is lower than that of the high-speed mode. It is configured to increase the ejection density of the treatment liquid in the high-speed mode.
  • the processing liquid nozzle arrays 51 to 54 ejecting the processing liquid are The number is "1".
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "2".
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "3".
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "2".
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "3".
  • the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "4".
  • the table T1 is configured to increase the ejection density of the treatment liquid for the recording medium 5 with low ink wettability as compared to the recording medium 5 with high ink wettability.
  • the processing liquid is ejected at a density exceeding 100%. That is, the treatment liquid lands at least once on all the pixels in the ejection range of the treatment liquid, and the treatment liquid lands on at least some of the pixels a plurality of times.
  • the processing liquid is ejected at a density exceeding 100% and not exceeding 200%.
  • the processing liquid nozzle rows 51 to 54 ejecting the processing liquid When the number of the processing liquid nozzle rows 51 to 54 ejecting the processing liquid is "3", the processing liquid is ejected at a density exceeding 200% and not exceeding 300%. When the number of the processing liquid nozzle rows 51 to 54 ejecting the processing liquid is "4", the processing liquid is ejected at a density exceeding 300% and not exceeding 400%.
  • the matrix of wettability and image quality shown in the table T1 and the number of the processing liquid nozzle arrays 51 to 54 associated therewith are only suitable examples.
  • the calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102 and the table T1. In this embodiment, the calculation unit 105 ejects the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102, the image quality selected by the image quality selection unit 103, and the table T1. Calculate the density.
  • the calculation unit 105 determines to eject the treatment liquid from the number of treatment liquid nozzle rows 51 to 54 defined in the table T1. For example, the calculation unit 105 may rotate the processing liquid nozzle arrays that eject the processing liquid so as to equalize the processing liquid nozzle arrays to be used.
  • the treatment liquid ejection unit 106 controls the first recording head 50 to eject the treatment liquid onto the recording medium 5 at the ejection density calculated by the calculation unit 105 . At this time, the treatment liquid ejecting unit 106 ejects the treatment liquid in droplets of the smallest size (here, droplets of small dots).
  • the ink ejection unit 107 controls the second recording head 60 to eject ink so as to overlap the treatment liquid that has landed on the recording medium 5 .
  • the ink ejection unit 107 ejects CMYK inks to the second recording head 60 so as to form an image with the selected image quality.
  • the droplet size of the ejected ink is preferably a mixture of large dots, medium dots, and small dots, depending on the density of the image.
  • the treatment liquid ejection unit 106 ejects the treatment liquid before the ink to the periphery of the pixels to which the second recording head 60 ejects the ink.
  • the scanning control unit 108 controls the carriage motor 34 to move the carriage 20 in the scanning direction Y.
  • the transport control unit 109 transports the recording medium 5 in the transport direction X by controlling the feed motor 43 .
  • the temperature control unit 110 controls the heating device 70 to maintain the temperature of the platen 12 at a predetermined temperature suitable for drying the ink and treatment liquid.
  • FIG. 5 is a flow chart showing an example of printing using a treatment liquid.
  • the ink wettability rank of the recording medium 5 is selected from high, medium, and low.
  • a type of recording medium 5 whose ink wettability is known may be selected.
  • the image quality is selected from among high image quality mode, standard mode and high speed mode.
  • an image to be printed is input. The order of steps S01 to S03 may be changed.
  • step S04 the input image is halftone-processed, and the pixels to which each ink is to be ejected are determined.
  • step S05 the range in which the treatment liquid is ejected is determined based on the result of the halftone processing, and the treatment liquid is determined based on the table T1 according to the ink wettability rank and image quality of the selected recording medium 5. and the processing liquid nozzle arrays 51 to 54 to be used are determined.
  • the range over which the treatment liquid is ejected may be on the pixels onto which the ink is ejected, and may also include the periphery thereof.
  • step S06 the treatment liquid is actually discharged onto the recording medium 5.
  • the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid are arranged on the upstream side X1 in the transport direction X from the ink nozzle arrays 61 to 64 for ejecting ink.
  • the treatment liquid is discharged from the determined treatment liquid nozzle row among the treatment liquid nozzle rows 51-54.
  • the recording medium 5 is transported to the downstream side X2 in the transport direction X in step S07.
  • step S08 ink is ejected from the ink nozzle arrays 61 to 64 of the second recording head 60 so as to overlap the treatment liquid on the recording medium 5, and one of the treatment liquid nozzle arrays 51 to 54 is selected.
  • the processing liquid is ejected from the nozzle arrays on the recording medium 5 to areas where the processing liquid has not yet been ejected. Although not shown in FIG. 5, the treatment liquid and the ink are superimposed on the recording medium 5 by repeating this process. Although not shown, the heating device 70 is driven during printing to maintain the platen 12 at a predetermined temperature for drying the ink and processing liquid.
  • the transport distance of the recording medium 5 in step S07 is a so-called multi It may be shorter than the length in the transport direction X of the nozzle rows 51 to 64 of the first recording head 50 and the second recording head 60 based on the pass printing method.
  • FIG. 6 is a schematic diagram of treatment liquid and ink dots when one of the treatment liquid nozzle arrays 51 to 54 is used to eject the treatment liquid.
  • the grid illustrated in FIG. 6 represents pixels.
  • a small dot of treatment liquid is denoted by Do.
  • a dot of ink is denoted by the symbol Di.
  • the droplet size of the ink dots Di the largest shown is a large dot, the smallest shown is a small dot, and the intermediate size between the two is a medium dot. The same applies to FIG. 7 as well.
  • the ejection density is 100% (a state in which the small dots Do of the treatment liquid have landed once on all pixels in the ejection range of the treatment liquid). ), the treatment liquid can be deposited on the recording medium 5 at an ejection density of up to ). If the amount of treatment liquid per area is the same, by making the droplet size of all the treatment liquid small dots, the spacing between the dots of the treatment liquid is smaller than when medium dots or large dots are used. can be done. As a result, as shown in FIG. 6, the probability that ink dots Di and treatment liquid dots Do meet can be increased.
  • the amount of treatment liquid may be insufficient for the ink in order to sufficiently react the ink and the treatment liquid.
  • the treatment liquid is less likely to spread on the recording medium 5 . Therefore, it is preferable that the ejection density of the treatment liquid is higher.
  • the processing liquid does not spread on the recording medium 5 for a short period of time. Therefore, it is preferable that the ejection density of the treatment liquid is higher.
  • the treatment liquid when it is determined that the ejection density of the treatment liquid is insufficient at 100%, the treatment liquid is ejected from the plurality of nozzle rows 51 to 54 for the treatment liquid.
  • the ejection density is set to a density exceeding 100%.
  • FIG. 7 is a schematic diagram of treatment liquid and ink dots when the treatment liquid is ejected using a plurality of nozzle rows among the treatment liquid nozzle rows 51 to 54 .
  • the dots Do of the treatment liquid land at least once on all pixels in the ejection range of the treatment liquid.
  • a state in which dots Do of the treatment liquid have landed a plurality of times can be formed in at least some of the pixels.
  • the ejection density of the treatment liquid (the amount of treatment liquid per unit area) can be increased, and the reaction between the treatment liquid and the ink can be promoted.
  • the printer 10 includes a first recording head 50 that ejects onto the recording medium 5 a treatment liquid that fixes the ink on the recording medium 5 by reacting with the ink, and a second recording head that ejects the ink onto the recording medium 5 .
  • It includes a head 60 and a control device 100 that controls the first recording head 50 and the second recording head 60 .
  • the control device 100 includes a media selection section 102 , a condition storage section 104 , a calculation section 105 , a treatment liquid ejection section 106 and an ink ejection section 107 .
  • the medium selection unit 102 is configured to be able to select one rank from among predetermined ranks regarding ink wettability of the recording medium 5 .
  • the condition storage unit 104 stores a table T1 in which the ink wettability rank of the recording medium 5 and the discharge density of the treatment liquid discharged by the first recording head 50 are linked.
  • the calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102 and the table T1.
  • the treatment liquid ejection unit 106 controls the first recording head 50 to eject the treatment liquid onto the recording medium 5 at the ejection density calculated by the calculation unit 105 .
  • the ink ejection unit 107 controls the second recording head 60 to eject ink so as to overlap the treatment liquid that has landed on the recording medium 5 .
  • the ejection density of the treatment liquid can be adjusted according to the degree of wetting and spreading of the treatment liquid on the recording medium 5 due to the ink wettability of the recording medium 5 .
  • the ink can sufficiently react with the treatment liquid and be fixed on the recording medium 5 regardless of the recording medium 5 .
  • the table T1 is configured to increase the ejection density of the treatment liquid for the recording medium 5 with low ink wettability as compared to the recording medium 5 with high ink wettability. The reason for doing so is as described above. As a result, the ink can be sufficiently fixed even on the recording medium 5 with low ink wettability.
  • the first recording head 50 includes a plurality of treatment liquid nozzle rows 51 to 54 each having a plurality of nozzles 51a to 54a for ejecting treatment liquid.
  • the number of the processing liquid nozzle rows 51 to 54 for discharging the processing liquid is set as the discharge density of the processing liquid. According to this configuration, the ejection density of the treatment liquid can be increased or decreased by increasing or decreasing the number of the treatment liquid nozzle rows 51 to 54 that eject the treatment liquid.
  • the printer 10 includes a carriage 20 that holds the first recording head 50 and the second recording head 60, and a carriage moving device 30 that moves the carriage 20 in the scanning direction Y.
  • a plurality of processing liquid nozzle rows 51 to 54 are arranged side by side in the scanning direction Y. As shown in FIG. According to this configuration, by simultaneously using selected nozzle rows from among the plurality of treatment liquid nozzle rows 51 to 54 arranged in the scanning direction, the time required to eject the treatment liquid can be adjusted to the ejection density of the treatment liquid. You can do the same regardless. That is, even if the ejection density of the treatment liquid is increased, it is possible to suppress an increase in the time required to eject the treatment liquid.
  • the carriage moving device 30 may be any moving device that moves at least one of the carriage 20 and the recording medium 5 to move the carriage 20 in the scanning direction Y with respect to the recording medium 5 .
  • the moving device may move the recording medium 5 in the scanning direction Y, or may move both the carriage 20 and the recording medium 5 in the scanning direction Y.
  • the printer 10 includes a conveying device 40 that moves the recording medium 5 in the conveying direction X orthogonal to the scanning direction Y.
  • the second recording head 60 includes ink nozzle arrays 61 to 64 each having a plurality of nozzles 61a to 64a for ejecting ink.
  • the plurality of treatment liquid nozzle rows 51-54 are provided on the upstream side X1 in the transport direction X from the ink nozzle rows 61-64. According to such a configuration, the ejection of the treatment liquid by the first recording head 50 and the ejection of the ink by the second recording head 60 can be performed in parallel. Therefore, the time required for image formation can be shortened.
  • the conveying device 40 may also be a moving device that moves the recording medium 5 in the conveying direction X with respect to the carriage 20 by moving at least one of the recording medium 5 and the carriage 20 .
  • the moving device may move the carriage 20 in the transport direction X, or may move both the carriage 20 and the recording medium 5 in the transport direction X.
  • the control device 100 includes a droplet control unit 101 capable of adjusting the droplet sizes of the treatment liquid and ink to a plurality of sizes.
  • the treatment liquid ejection unit 106 ejects the treatment liquid with the smallest droplet size.
  • the distance between the dots Do of the treatment liquid is the smallest.
  • the number of the dots Do of the treatment liquid is the largest. Therefore, the probability that ink dots Di and treatment liquid dots Do meet can be increased.
  • the control device 100 includes an image quality selection unit 103 configured to select one image quality from a plurality of predetermined image qualities.
  • the table T ⁇ b>1 associates the matrix of the ink wettability rank and the image quality of the recording medium 5 with the discharge density of the treatment liquid discharged by the first recording head 50 .
  • the calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102, the image quality selected by the image quality selection unit 103, and the table T1. According to such a configuration, it is possible to obtain the ejection density of the treatment liquid in consideration of not only the ink wettability of the recording medium 5 but also the image quality. Therefore, print quality (at least quality including image quality and reliability of ink fixation) can be managed more precisely.
  • the image quality selectable by the image quality selection unit 103 includes a high-speed mode and other modes (here, the standard mode and the high-quality mode) in which the printing speed is slower than the high-speed mode.
  • the table T1 is configured to increase the ejection density of the processing liquid in the high-speed mode compared to other modes. The reason for doing so is as described above. As a result, even in the high-speed mode in which the wetting and spreading time of the treatment liquid is short, the ink can be sufficiently fixed.
  • the ejection density of the treatment liquid (amount of treatment liquid per area) is adjusted by adjusting the number of nozzle rows from which the treatment liquid is ejected among the treatment liquid nozzle rows 51 to 54. Ta.
  • the method of adjusting the ejection density of the treatment liquid is not limited to this.
  • the discharge density of the treatment liquid for example, the upper limit of the number of dots of the treatment liquid per area is set to 1 dot per pixel, and the shortage or excess is determined by adjusting the droplet size of part or all of the treatment liquid. It may be adjusted by increasing or decreasing.
  • the ejection density of the treatment liquid may be adjusted, for example, by the number of times the first print head ejects the treatment liquid.
  • the number of processing liquid nozzle rows to be used may be constant, and the number of times the first print head is scanned while ejecting the processing liquid may be adjusted.
  • a method for adjusting the ejection density of the treatment liquid is not particularly limited.
  • the ink wettability of the recording medium and the elements that make up the matrix are not limited to image quality.
  • the table may determine the ejection density of the treatment liquid based only on the ink wettability of the recording medium.
  • the configuration of the inkjet printer is not limited to the above.
  • the inkjet printer does not have to be, for example, a so-called roll-to-roll type inkjet printer that prints on a roll-shaped recording medium on a platen.
  • the inkjet printer may be, for example, a so-called flatbed type inkjet printer that prints on a recording medium placed on a moving support base.
  • the arrangement of the treatment liquid nozzle row and the ink nozzle row is not limited to the so-called staggered arrangement.
  • the treatment liquid nozzle row and the ink nozzle row may be arranged side by side in the scanning direction.
  • the treatment liquid nozzle row and the ink nozzle row may be arranged such that they are partially overlapped and partially misaligned in the transport direction.
  • recording medium 10 inkjet printer 20 carriage 30 carriage moving device (first moving device) 40 transport device (second moving device) 50 First recording head 51 to 54 Nozzle row for treatment liquid (first nozzle row) 51a to 54a nozzles (first nozzle) 60 Second recording head 61-64 Ink nozzle row (second nozzle row) 61a to 64a nozzles (second nozzles) 100 Control device 101 Droplet control unit 102 Media selection unit 103 Image quality selection unit 104 Condition storage unit (storage unit) 105 Calculation unit 106 Treatment liquid ejection unit 107 Ink ejection unit Di Ink dot Do Treatment liquid dot T1 Table

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  • Ink Jet (AREA)

Abstract

An inkjet printer 10 comprises: a first recording head 50 which ejects, onto a recording medium 5, processing liquid that reacts with ink to fix the ink to the recording medium 5; and a second recording head 60 which ejects the ink onto the recording medium 5. A media selecting unit 102 of a control device 100 is configured to be capable of selecting one rank from among predetermined ranks relating to ink wettability of the recording medium 5. A storage unit 104 stores a table T1 associating the ink wettability rank of the recording medium 5 and a discharge density of the processing liquid ejected by the first recording head 50. A calculating unit 105 calculates the discharge density of the processing liquid on the basis of the ink wettability rank of the recording medium 5 selected by the media selecting unit 102 and the table T1. A processing liquid discharge unit 106 controls the first recording head 50 to discharge the processing liquid onto the recording medium 5 with the discharge density calculated by the calculating unit 105.

Description

インクジェットプリンタinkjet printer
　本発明は、インクジェットプリンタに関する。 The present invention relates to inkjet printers.
　インクと反応する処理液を使用する印刷方法が従来から知られている。例えば特許文献１には、着色インクを構成している組成物の一部である着色剤や樹脂等に対して、化学的に反応または物理的に吸着することで、インク全体の流動性の低下を生じさせる処理液を転写ドラムに付与する画像記録装置が開示されている。特許文献１に開示された画像記録装置では、処理液が付与された後の転写ドラムに着色剤を含むインクを吐出する。特許文献１によれば、これにより、転写ドラム上におけるインクの流動性を低下させ、良好な画像を形成することができる、とされる。 A printing method that uses a treatment liquid that reacts with ink has been known for some time. For example, in Patent Document 1, the fluidity of the entire ink is reduced by chemically reacting or physically adsorbing a coloring agent, resin, etc., which are part of the composition that constitutes the colored ink. An image recording apparatus is disclosed that applies a treatment liquid to a transfer drum that causes a . In the image recording apparatus disclosed in Japanese Patent Application Laid-Open No. 2002-200000, ink containing a coloring agent is ejected onto the transfer drum after the treatment liquid has been applied. According to Japanese Patent Application Laid-Open No. 2002-200012, this reduces the fluidity of the ink on the transfer drum, thereby forming a good image.
　特許文献１には、１ノズル当たりのインクの吐出量よりも１ノズル当たりの処理液の吐出量を少なくすることが開示されている。特許文献１によれば、これにより、処理液ドットの密度がインクドットの密度よりも高くなり、インクまたは処理液に着弾位置のずれが生じても、インクと処理液とが出会う確率が増加する、とされる。 Patent Document 1 discloses that the amount of treatment liquid ejected per nozzle is smaller than the amount of ink ejected per nozzle. According to Patent Document 1, this makes the density of the treatment liquid dots higher than the density of the ink dots, and increases the probability that the ink and the treatment liquid will meet even if the landing position of the ink or the treatment liquid is shifted. , and
特開２００７－２１８９１号公報Japanese Patent Application Laid-Open No. 2007-21891
　特許文献１に開示されているように、処理液の吐出量を変えることなく１ノズル当たりの処理液の吐出量を少なくすると、インクと処理液とが出会う確率が増加する。しかし、所定量のインクを十分に記録媒体に定着できる処理液の量は、記録媒体の特性によって異なり、インクと処理液とが出会う確率を増加させただけではインクの定着が十分に行われない場合があり得る。 As disclosed in Patent Document 1, if the ejection amount of the treatment liquid per nozzle is reduced without changing the ejection amount of the treatment liquid, the probability that the ink and the treatment liquid meet increases. However, the amount of treatment liquid that can sufficiently fix a predetermined amount of ink on the recording medium varies depending on the characteristics of the recording medium, and the ink cannot be sufficiently fixed only by increasing the probability that the ink and the treatment liquid meet. There are cases.
　本発明はかかる点に鑑みてなされたものであり、その目的は、インクと反応してインクを記録媒体に定着させる処理液を吐出するインクジェットプリンタであって、記録媒体によらずインクを十分に記録媒体に定着できるインクジェットプリンタを提供することである。 SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an inkjet printer that ejects a treatment liquid that reacts with ink to fix the ink on a recording medium, and that sufficiently supplies the ink regardless of the recording medium. An object of the present invention is to provide an ink jet printer capable of fixing on a recording medium.
　ここに開示するインクジェットプリンタは、インクと反応することにより前記インクを記録媒体に定着させる処理液を前記記録媒体に吐出する第１記録ヘッドと、前記記録媒体に前記インクを吐出する第２記録ヘッドと、前記第１記録ヘッドおよび前記第２記録ヘッドを制御する制御装置と、を備える。前記制御装置は、メディア選択部と、記憶部と、算出部と、処理液吐出部と、インク吐出部と、を備えている。前記メディア選択部は、前記記録媒体のインク濡れ性に関する予め定められたランクのうちから１つのランクを選択可能に構成されている。前記記憶部は、前記記録媒体のインク濡れ性のランクと前記第１記録ヘッドによって吐出される前記処理液の吐出密度とが紐づけされたテーブルを記憶している。前記算出部は、前記メディア選択部で選択された前記記録媒体のインク濡れ性のランクと前記テーブルとに基づいて前記処理液の吐出密度を算出する。前記処理液吐出部は、前記第１記録ヘッドを制御して、前記算出部によって算出された吐出密度で前記処理液を前記記録媒体に吐出させる。前記インク吐出部は、前記第２記録ヘッドを制御して、前記記録媒体に着弾した前記処理液に重ねるように前記インクを吐出させる。 The inkjet printer disclosed herein includes a first recording head that ejects a treatment liquid that fixes the ink on the recording medium by reacting with the ink, and a second recording head that ejects the ink onto the recording medium. and a control device that controls the first recording head and the second recording head. The control device includes a media selection section, a storage section, a calculation section, a treatment liquid ejection section, and an ink ejection section. The media selection unit is configured to be able to select one rank from among predetermined ranks regarding the ink wettability of the recording medium. The storage unit stores a table in which the ink wettability rank of the recording medium and the ejection density of the treatment liquid ejected by the first recording head are associated with each other. The calculation unit calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium selected by the medium selection unit and the table. The treatment liquid ejection section controls the first recording head to eject the treatment liquid onto the recording medium at the ejection density calculated by the calculation section. The ink ejection section controls the second recording head to eject the ink so as to overlap the treatment liquid that has landed on the recording medium.
　上記インクジェットプリンタによれば、記憶されたテーブルに基づき、記録媒体のインク濡れ性に応じた処理液の吐出密度が算出される。記録媒体のインク濡れ性に応じて処理液の記録媒体での濡れ広がりの程度も変化するため、かかるインクジェットプリンタによれば、記録媒体における処理液の濡れ広がりの程度に応じて処理液の吐出密度を調整することができる。これにより、記録媒体によらずインクを十分に記録媒体に定着することができる。 According to the inkjet printer described above, the discharge density of the treatment liquid is calculated according to the ink wettability of the recording medium based on the stored table. Since the degree of wetting and spreading of the treatment liquid on the recording medium also changes according to the ink wettability of the recording medium, according to this inkjet printer, the discharge density of the treatment liquid can be adjusted according to the degree of wetting and spreading of the treatment liquid on the recording medium. can be adjusted. As a result, the ink can be sufficiently fixed on the recording medium regardless of the recording medium.
一実施形態に係るインクジェットプリンタの正面図である。1 is a front view of an inkjet printer according to one embodiment; FIG. キャリッジ下面の構成を模式的に示す平面図である。FIG. 3 is a plan view schematically showing the configuration of the lower surface of the carriage; プリンタのブロック図である。1 is a block diagram of a printer; FIG. テーブルの一例を示す図である。It is a figure which shows an example of a table. 処理液を使用した印刷の一例を示すフローチャートである。4 is a flow chart showing an example of printing using a treatment liquid; １つの処理液用ノズル列を使用して処理液を吐出する場合の処理液およびインクのドットの模式図である。FIG. 4 is a schematic diagram of dots of the treatment liquid and ink when the treatment liquid is ejected using one treatment liquid nozzle row. 複数の処理液用ノズル列を使用して処理液を吐出する場合の処理液およびインクのドットの模式図である。FIG. 4 is a schematic diagram of treatment liquid and ink dots when the treatment liquid is ejected using a plurality of treatment liquid nozzle rows.
　以下、図面を参照しながら、一実施形態に係るインクジェットプリンタについて説明する。なお、ここで説明される実施形態は、当然ながら特に本発明を限定することを意図したものではない。また、同じ作用を奏する部材、部位には同じ符号を付し、重複する説明は適宜省略または簡略化する。以下の説明では、インクジェットプリンタを正面から見たときに、インクジェットプリンタから遠ざかる方を前方、インクジェットプリンタに近づく方を後方とする。また、図面中の符号Ｆ、Ｒｒ、Ｌ、Ｒ、Ｕ、Ｄは、それぞれ前、後、左、右、上、下を表している。ただし、これらは説明の便宜上の方向に過ぎず、インクジェットプリンタの設置態様等を限定するものではない。 An inkjet printer according to one embodiment will be described below with reference to the drawings. It should be noted that the embodiments described herein are, of course, not intended to limit the invention in particular. Further, members and portions having the same action are denoted by the same reference numerals, and overlapping descriptions are appropriately omitted or simplified. In the following description, when the inkjet printer is viewed from the front, the side away from the inkjet printer is the front, and the side closer to the inkjet printer is the rear. In addition, symbols F, Rr, L, R, U, and D in the drawings represent front, rear, left, right, up, and down, respectively. However, these directions are merely for convenience of explanation, and do not limit the installation mode of the inkjet printer.
　［インクジェットプリンタの構成］
　図１は、一実施形態に係る大判のインクジェットプリンタ（以下、「プリンタ」とする。）１０の正面図である。プリンタ１０は、ロール状の記録媒体５を前後方向に移動させるとともに、左右方向に移動するキャリッジ２０に搭載された第１記録ヘッド５０から処理液を、同じくキャリッジ２０に搭載された第２記録ヘッド６０からインクを吐出することによって、記録媒体５上に画像を形成する。以下、キャリッジ２０の移動方向のことを走査方向Ｙとも呼び、記録媒体５の移動方向のことを搬送方向Ｘ（図２参照）とも呼ぶ。走査方向Ｙは、ここでは左右方向である。搬送方向Ｘは、ここでは、前後方向である。走査方向Ｙと搬送方向Ｘとは直交している。搬送方向Ｘには、印刷方向の上流側Ｘ１と下流側Ｘ２とが設定されている（図２参照）。記録媒体５は、印刷中、搬送方向Ｘの上流側Ｘ１から下流側Ｘ２に向かって搬送される。本実施形態では、搬送方向Ｘの上流側Ｘ１は後方である。搬送方向Ｘの下流側Ｘ２は前方である。 [Configuration of inkjet printer]
FIG. 1 is a front view of a large format inkjet printer (hereinafter referred to as "printer") 10 according to one embodiment. The printer 10 moves the roll-shaped recording medium 5 in the front-rear direction, and the treatment liquid is transferred from the first recording head 50 mounted on the carriage 20 that moves in the left-right direction to the second recording head also mounted on the carriage 20 . An image is formed on the recording medium 5 by ejecting ink from 60 . Hereinafter, the moving direction of the carriage 20 is also referred to as the scanning direction Y, and the moving direction of the recording medium 5 is also referred to as the transport direction X (see FIG. 2). The scanning direction Y is the horizontal direction here. The transport direction X here is the front-rear direction. The scanning direction Y and the transporting direction X are orthogonal. In the transport direction X, an upstream side X1 and a downstream side X2 in the printing direction are set (see FIG. 2). The recording medium 5 is conveyed from the upstream side X1 toward the downstream side X2 in the conveying direction X during printing. In this embodiment, the upstream side X1 in the transport direction X is the rear side. The downstream side X2 in the transport direction X is the front side.
　処理液は、インクを増粘または色材を凝集・不溶化させることで、インクを記録媒体５に定着させる液である。処理液は、オプティマイザインクとも呼ばれる。処理液は、ここでは、透明な液体である。処理液は、反応成分を水に溶解したものであり、水分を蒸発させることにより記録媒体５に定着される。ただし、処理液は、上記したものには限定されず、例えば、反応成分を水以外の溶媒に溶解したものであってもよい。第２記録ヘッド６０から吐出されるインクは、ここでは、水性のＣＭＹＫインクである。ただし、第２記録ヘッド６０から吐出されるインクの種類や色は、特に限定されない。第２記録ヘッド６０から吐出されるインクは、処理液と反応することにより増粘または色材の凝集・不溶化を生じ、水分を蒸発させることにより記録媒体５に定着される。 The treatment liquid is a liquid that fixes the ink to the recording medium 5 by increasing the viscosity of the ink or by aggregating and insolubilizing the coloring material. The treatment liquid is also called optimizer ink. The processing liquid is here a transparent liquid. The treatment liquid is obtained by dissolving a reaction component in water, and is fixed on the recording medium 5 by evaporating water. However, the treatment liquid is not limited to those described above, and may be, for example, a solution in which the reaction components are dissolved in a solvent other than water. The inks ejected from the second recording head 60 are water-based CMYK inks here. However, the type and color of ink ejected from the second recording head 60 are not particularly limited. The ink ejected from the second recording head 60 reacts with the treatment liquid to cause thickening or agglomeration/insolubilization of the coloring material, and is fixed on the recording medium 5 by evaporating water.
　記録媒体５は、画像が印刷される対象物である。記録媒体５は特に限定されない。記録媒体５は、例えば、普通紙やインクジェット用印刷紙等の紙類であってもよいし、樹脂製やガラス製などの透明なシートであってもよい。金属製やゴム製等のシートであってもよい。また、布帛であってもよい。記録媒体５は、その材質や表面処理により、インクの濡れ性が異なっている。ここで、「インク濡れ性」とは、着弾したインクの濡れ広がりやすさを意味する。記録媒体５のインク濡れ性が高いと、インクは記録媒体５上で濡れ広がりやすい。記録媒体５のインク濡れ性が低いと、インクは記録媒体５上で濡れ広がりにくい。処理液の濡れ性も記録媒体５によって異なる。記録媒体５のインク濡れ性が低い記録媒体５では処理液の濡れ性も小さく、記録媒体５のインク濡れ性が高い記録媒体５では処理液の濡れ性も大きい。記録媒体５がインクおよび処理液を吸収しやすい場合には、インクおよび処理液の濡れ性は低い。記録媒体５がインクおよび処理液を吸収しにくいか、または吸収しない場合には、インクおよび処理液の濡れ性は、記録媒体５によって異なる。 The recording medium 5 is an object on which an image is printed. The recording medium 5 is not particularly limited. The recording medium 5 may be, for example, paper such as plain paper or inkjet printing paper, or may be a transparent sheet made of resin, glass, or the like. A sheet made of metal, rubber, or the like may be used. Also, it may be a cloth. The recording medium 5 has different ink wettability depending on its material and surface treatment. Here, the term "ink wettability" means the ease with which the ink that has landed spreads out. When the ink wettability of the recording medium 5 is high, the ink tends to wet and spread on the recording medium 5 . If the ink wettability of the recording medium 5 is low, the ink is less likely to wet and spread on the recording medium 5 . The wettability of the treatment liquid also differs depending on the recording medium 5 . The recording medium 5 having low wettability with ink has low wettability with the treatment liquid, and the recording medium 5 with high wettability with ink has high wettability with the treatment liquid. When the recording medium 5 easily absorbs the ink and the treatment liquid, the wettability of the ink and the treatment liquid is low. When the recording medium 5 does not absorb the ink and the treatment liquid easily or does not absorb the ink and the treatment liquid, the wettability of the ink and the treatment liquid varies depending on the recording medium 5 .
　図１に示すように、プリンタ１０は、第１記録ヘッド５０と、第２記録ヘッド６０と、第１記録ヘッド５０および第２記録ヘッド６０を保持するキャリッジ２０と、キャリッジ２０を走査方向Ｙに移動させるキャリッジ移動装置３０と、記録媒体５を搬送方向Ｘに移動させる搬送装置４０と、インクおよび処理液を乾燥させる加熱装置７０と、制御装置１００と、を備えている。 As shown in FIG. 1, the printer 10 includes a first recording head 50, a second recording head 60, a carriage 20 that holds the first recording head 50 and the second recording head 60, and the carriage 20 in the scanning direction Y. It includes a carriage moving device 30 for moving, a conveying device 40 for moving the recording medium 5 in the conveying direction X, a heating device 70 for drying ink and treatment liquid, and a control device 100 .
　キャリッジ移動装置３０は、ガイドレール３１と、ベルト３２と、左右のプーリ３３ａおよび３３ｂと、キャリッジモータ３４とを備えている。ガイドレール３１には、キャリッジ２０が摺動自在に係合している。ガイドレール３１は、走査方向Ｙに延びている。ガイドレール３１は、キャリッジ２０の走査方向Ｙへの移動をガイドする。ベルト３２は、キャリッジ２０に固定されている。ベルト３２は、無端状のベルトである。ベルト３２は、ガイドレール３１の右側に設けられたプーリ３３ａおよび左側に設けられたプーリ３３ｂに巻き掛けられている。右側のプーリ３３ａにはキャリッジモータ３４が取り付けられている。キャリッジモータ３４は、制御装置１００と電気的に接続されている。キャリッジモータ３４は、制御装置１００によって制御される。キャリッジモータ３４が駆動するとプーリ３３ａが回転し、ベルト３２が走行する。それにより、キャリッジ２０がガイドレール３１に沿って走査方向Ｙに移動する。 The carriage moving device 30 includes a guide rail 31, a belt 32, left and right pulleys 33a and 33b, and a carriage motor . The carriage 20 is slidably engaged with the guide rails 31 . The guide rail 31 extends in the scanning direction Y. As shown in FIG. The guide rail 31 guides the movement of the carriage 20 in the scanning direction Y. As shown in FIG. Belt 32 is fixed to carriage 20 . The belt 32 is an endless belt. The belt 32 is wound around a pulley 33a provided on the right side of the guide rail 31 and a pulley 33b provided on the left side. A carriage motor 34 is attached to the right pulley 33a. Carriage motor 34 is electrically connected to control device 100 . Carriage motor 34 is controlled by control device 100 . When the carriage motor 34 is driven, the pulley 33a rotates and the belt 32 runs. Thereby, the carriage 20 moves in the scanning direction Y along the guide rails 31 .
　キャリッジ２０の下方には、プラテン１２が配置されている。プラテン１２は、走査方向Ｙおよび搬送方向Ｘに延びている。プラテン１２には記録媒体５が載置される。搬送装置４０は、プラテン１２上の記録媒体５を搬送方向Ｘに移動させる。搬送装置４０は、ピンチローラ４１と、グリットローラ４２と、フィードモータ４３とを備えている。ピンチローラ４１はプラテン１２の上方に設けられ、記録媒体５を上から押下する。ピンチローラ４１は、キャリッジ２０より後方に配置されている。プラテン１２には、グリットローラ４２が設けられている。グリットローラ４２は、ピンチローラ４１の下方に配置されている。グリットローラ４２は、ピンチローラ４１と対向する位置に設けられている。グリットローラ４２は、フィードモータ４３に連結されている。グリットローラ４２は、フィードモータ４３の駆動力を受けて回転可能に形成されている。フィードモータ４３は、制御装置１００と電気的に接続されている。フィードモータ４３は、制御装置１００によって制御される。ピンチローラ４１とグリットローラ４２との間に記録媒体５が挟まれた状態でグリットローラ４２が回転すると、記録媒体５は搬送方向Ｘに搬送される。 A platen 12 is arranged below the carriage 20 . The platen 12 extends in the scanning direction Y and the transporting direction X. As shown in FIG. A recording medium 5 is placed on the platen 12 . The conveying device 40 moves the recording medium 5 on the platen 12 in the conveying direction X. As shown in FIG. The conveying device 40 includes a pinch roller 41 , a grit roller 42 and a feed motor 43 . A pinch roller 41 is provided above the platen 12 and presses down the recording medium 5 from above. The pinch roller 41 is arranged behind the carriage 20 . A grit roller 42 is provided on the platen 12 . The grit roller 42 is arranged below the pinch roller 41 . The grit roller 42 is provided at a position facing the pinch roller 41 . The grit roller 42 is connected to the feed motor 43 . The grit roller 42 is rotatable by receiving the driving force of the feed motor 43 . Feed motor 43 is electrically connected to control device 100 . Feed motor 43 is controlled by control device 100 . When the recording medium 5 is sandwiched between the pinch roller 41 and the grit roller 42 and the grit roller 42 rotates, the recording medium 5 is transported in the transport direction X.
　加熱装置７０は、プラテン１２に埋設されている。加熱装置７０は、プラテン１２を加熱することにより、記録媒体５に着弾したインクおよび処理液を乾燥させる。加熱装置７０は、ここでは、プラテン１２を加熱するヒータを備えている。ただし、加熱装置７０の構成は特に限定されない。加熱装置７０は、例えば、記録媒体５に熱風を吹きつける熱風発生装置を備えていてもよい。加熱装置７０は、プラテン１２よりも上方に設けられ、記録媒体５を直接加熱するように構成されていてもよい。 The heating device 70 is embedded in the platen 12. The heating device 70 dries the ink and treatment liquid that have landed on the recording medium 5 by heating the platen 12 . The heating device 70 includes a heater for heating the platen 12 here. However, the configuration of the heating device 70 is not particularly limited. The heating device 70 may include, for example, a hot air generator that blows hot air onto the recording medium 5 . The heating device 70 may be provided above the platen 12 and configured to directly heat the recording medium 5 .
　図２は、キャリッジ２０の下面の構成を模式的に示す平面図である。図２に示すように、本実施形態に係るプリンタ１０は、記録媒体５に処理液を吐出する第１記録ヘッド５０と、記録媒体５にインクを吐出する第２記録ヘッド６０と、を備えている。第１記録ヘッド５０は、第２記録ヘッド６０よりも搬送方向Ｘの上流側Ｘ１、かつ、第２記録ヘッド６０よりも右方に配置されている。本実施形態では、第１記録ヘッド５０と第２記録ヘッド６０とは、ノズルが形成されたノズル面を共有しないように分離されているが、ノズル面を共有するように一体化されていてもよい。第１記録ヘッド５０は処理液を吐出するノズルを備え、第２記録ヘッド６０はインクを吐出するノズルを備えていればよく、第１記録ヘッド５０と第２記録ヘッド６０とがどのように分割され、または一体化されているかは特に限定されない。 FIG. 2 is a plan view schematically showing the structure of the lower surface of the carriage 20. FIG. As shown in FIG. 2, the printer 10 according to this embodiment includes a first recording head 50 that ejects treatment liquid onto the recording medium 5 and a second recording head 60 that ejects ink onto the recording medium 5. there is The first recording head 50 is arranged on the upstream side X<b>1 in the transport direction X from the second recording head 60 and on the right side of the second recording head 60 . In the present embodiment, the first recording head 50 and the second recording head 60 are separated so as not to share the nozzle surface where the nozzles are formed. good. The first recording head 50 is provided with nozzles for ejecting treatment liquid, and the second recording head 60 is provided with nozzles for ejecting ink. It is not particularly limited whether it is connected or integrated.
　図２に示すように、第１記録ヘッド５０は、処理液を吐出する複数のノズルをそれぞれ備えた複数の処理液用ノズル列５１～５４を備えている。ただし、処理液用ノズル列の数は特に限定されない。複数の処理液用ノズル列５１～５４は、走査方向Ｙに並んで設けられている。以下、複数の処理液用ノズル列５１～５４を右方から処理液用第１ノズル列５１、処理液用第２ノズル列５２、処理液用第３ノズル列５３、および処理液用第４ノズル列５４とも呼ぶ。処理液用第１ノズル列５１は、搬送方向Ｘに並んだ複数のノズル５１ａを備えている。処理液用第２ノズル列５２は、搬送方向Ｘに並んだ複数のノズル５２ａを備えている。処理液用第３ノズル列５３は、搬送方向Ｘに並んだ複数のノズル５３ａを備えている。処理液用第４ノズル列５４は、搬送方向Ｘに並んだ複数のノズル５４ａを備えている。 As shown in FIG. 2, the first recording head 50 includes a plurality of processing liquid nozzle rows 51 to 54 each having a plurality of nozzles for ejecting processing liquid. However, the number of processing liquid nozzle rows is not particularly limited. A plurality of processing liquid nozzle rows 51 to 54 are arranged side by side in the scanning direction Y. As shown in FIG. The plurality of treatment liquid nozzle rows 51 to 54 are arranged from the right side to the right: a first treatment liquid nozzle row 51, a second treatment liquid nozzle row 52, a third treatment liquid nozzle row 53, and a fourth treatment liquid nozzle row. Also called column 54 . The treatment liquid first nozzle row 51 includes a plurality of nozzles 51a arranged in the transport direction X. As shown in FIG. The processing liquid second nozzle array 52 includes a plurality of nozzles 52a arranged in the transport direction X. As shown in FIG. The treatment liquid third nozzle row 53 includes a plurality of nozzles 53a arranged in the transport direction X. As shown in FIG. The fourth treatment liquid nozzle row 54 includes a plurality of nozzles 54a arranged in the transport direction X. As shown in FIG.
　第２記録ヘッド６０は、インクを吐出する複数のノズルをそれぞれ備えた複数のインク用ノズル列６１～６４を備えている。複数のインク用ノズル列６１～６４は、走査方向Ｙに並んで設けられている。インク用ノズル列６１～６４は、それぞれ、シアンインク、マゼンタインク、イエローインク、およびブラックインクを吐出する。以下、複数のインク用ノズル列６１～６４を区別する場合には、それぞれ、シアンインク用ノズル列６１、マゼンタインク用ノズル列６２、イエローインク用ノズル列６３、および、ブラックインク用ノズル列６４とも呼ぶ。シアンインク用ノズル列６１は、搬送方向Ｘに並び、それぞれシアンインクを吐出する複数のノズル６１ａを備えている。マゼンタインク用ノズル列６２は、搬送方向Ｘに並び、それぞれマゼンタインクを吐出する複数のノズル６２ａを備えている。イエローインク用ノズル列６３は、搬送方向Ｘに並び、それぞれイエローインクを吐出する複数のノズル６３ａを備えている。ブラックインク用ノズル列６４は、搬送方向Ｘに並び、それぞれブラックインクを吐出する複数のノズル６４ａを備えている。複数のインク用ノズル列６１～６４が並ぶ順番は特に限定されない。 The second recording head 60 has a plurality of ink nozzle rows 61 to 64 each having a plurality of nozzles for ejecting ink. A plurality of ink nozzle rows 61 to 64 are arranged side by side in the scanning direction Y. As shown in FIG. The ink nozzle rows 61 to 64 eject cyan ink, magenta ink, yellow ink, and black ink, respectively. Hereinafter, when distinguishing between a plurality of ink nozzle rows 61 to 64, the cyan ink nozzle row 61, the magenta ink nozzle row 62, the yellow ink nozzle row 63, and the black ink nozzle row 64 are also referred to as call. The cyan ink nozzle row 61 is arranged in the transport direction X and includes a plurality of nozzles 61a for ejecting cyan ink. The magenta ink nozzle row 62 is arranged in the transport direction X and includes a plurality of nozzles 62a that each eject magenta ink. The yellow ink nozzle row 63 is arranged in the transport direction X and includes a plurality of nozzles 63a for ejecting yellow ink. The black ink nozzle row 64 is arranged in the transport direction X and includes a plurality of nozzles 64a for ejecting black ink. The order in which the plurality of ink nozzle rows 61 to 64 are arranged is not particularly limited.
　図２において、複数の処理液用ノズル列５１～５４は、複数のインク用ノズル列６１～６４よりも搬送方向Ｘの上流側Ｘ１に設けられている。第１記録ヘッド５０と第２記録ヘッド６０とは、処理液用ノズル列５１～５４とインク用ノズル列６１～６４とが搬送方向Ｘに関して重ならない程度に、搬送方向Ｘに関して重なっている。なお、第１記録ヘッド５０と第２記録ヘッド６０とは、搬送方向Ｘに関して全く重なっていなくてもよい。その場合、第１記録ヘッド５０と第２記録ヘッド６０とは、走査方向Ｙの位置が揃うとともに、搬送方向Ｘに並んで配置されていてもよい。ただし、第１記録ヘッド５０と第２記録ヘッド６０との位置関係は、処理液がインクよりも先に記録媒体５に着弾し処理液が濡れ広がる時間を確保できれば、特に限定されない。例えば、第１記録ヘッド５０と第２記録ヘッド６０とは、搬送方向Ｘの位置が揃っていてもよい。そのような場合でも、例えば、処理液をキャリッジ２０の移動の往路で、インクを復路で吐出することにより、処理液をインクよりも先に吐出することができる。または、例えば、第１記録ヘッド５０の上流側Ｘ１の約半分のノズルから処理液を吐出し、第２記録ヘッド６０の下流側Ｘ２の約半分のノズルからインクを吐出することにより、処理液をインクよりも先に吐出することができる。 In FIG. 2, the plurality of treatment liquid nozzle rows 51-54 are provided on the upstream side X1 in the transport direction X from the plurality of ink nozzle rows 61-64. The first recording head 50 and the second recording head 60 overlap in the transport direction X to the extent that the treatment liquid nozzle rows 51 to 54 and the ink nozzle rows 61 to 64 do not overlap in the transport direction X. It should be noted that the first recording head 50 and the second recording head 60 do not have to overlap each other in the transport direction X at all. In that case, the first recording head 50 and the second recording head 60 may be aligned in the scanning direction Y and arranged side by side in the transporting direction X. FIG. However, the positional relationship between the first recording head 50 and the second recording head 60 is not particularly limited as long as the treatment liquid lands on the recording medium 5 before the ink and the time for the treatment liquid to spread is ensured. For example, the first recording head 50 and the second recording head 60 may be aligned in the transport direction X. Even in such a case, for example, the treatment liquid can be ejected before the ink by ejecting the treatment liquid on the forward path of the movement of the carriage 20 and the ink on the return path. Alternatively, for example, by ejecting the treatment liquid from approximately half of the nozzles on the upstream side X1 of the first recording head 50 and ejecting the ink from approximately half of the nozzles on the downstream side X2 of the second recording head 60, the processing liquid is discharged. It can be ejected before the ink.
　図１に示すように、プリンタ１０の右端部には、操作パネル１２０が設けられている。操作パネル１２０には、機器状態を表示する表示部と、ユーザーによって操作される入力キー等が設けられている。操作パネル１２０は、制御装置１００と接続されている。 As shown in FIG. 1, an operation panel 120 is provided at the right end of the printer 10. As shown in FIG. The operation panel 120 is provided with a display section for displaying device status, input keys operated by the user, and the like. Operation panel 120 is connected to control device 100 .
　図３は、本実施形態に係るプリンタ１０のブロック図である。図３に示すように、制御装置１００は、キャリッジモータ３４と、フィードモータ４３と、第１記録ヘッド５０と、第２記録ヘッド６０と、加熱装置７０と、にそれぞれ電気的に接続され、それらを制御可能に構成されている。制御装置１００の構成は特に限定されない。制御装置１００は、例えばマイクロコンピュータである。マイクロコンピュータのハードウェア構成は特に限定されないが、例えば、ホストコンピュータ等の外部機器から印刷データ等を受信するインターフェイス（Ｉ／Ｆ）と、制御プログラムの命令を実行する中央演算処理装置（ＣＰＵ：central processing unit）と、ＣＰＵが実行するプログラムを格納したＲＯＭ（read only memory）と、プログラムを展開するワーキングエリアとして使用されるＲＡＭ（random access memory）と、上記プログラムや各種データを格納するメモリ等の記憶装置と、を備えている。なお、制御装置１００は必ずしもプリンタ１０の内部に設けられている必要はなく、例えば、プリンタ１０の外部に設置され、有線または無線を介してプリンタ１０と通信可能に接続されたコンピュータ等であってもよい。 FIG. 3 is a block diagram of the printer 10 according to this embodiment. As shown in FIG. 3, the control device 100 is electrically connected to the carriage motor 34, the feed motor 43, the first recording head 50, the second recording head 60, and the heating device 70, respectively. is configured to be controllable. The configuration of the control device 100 is not particularly limited. The control device 100 is, for example, a microcomputer. The hardware configuration of the microcomputer is not particularly limited. processing unit), ROM (read only memory) that stores programs executed by the CPU, RAM (random access memory) that is used as a working area for developing programs, and memory that stores the above programs and various data a storage device; Note that the control device 100 does not necessarily have to be provided inside the printer 10. For example, the control device 100 may be a computer or the like installed outside the printer 10 and connected to the printer 10 via a wire or wirelessly so as to be communicable. good too.
　図３に示すように、制御装置１００は、液滴制御部１０１と、メディア選択部１０２と、画質選択部１０３と、条件記憶部１０４と、算出部１０５と、処理液吐出部１０６と、インク吐出部１０７と、走査制御部１０８と、搬送制御部１０９と、温度制御部１１０と、を備えている。 As shown in FIG. 3, the control device 100 includes a droplet control unit 101, a media selection unit 102, an image quality selection unit 103, a condition storage unit 104, a calculation unit 105, a treatment liquid ejection unit 106, an ink It has a discharge section 107 , a scanning control section 108 , a transport control section 109 and a temperature control section 110 .
　液滴制御部１０１は、処理液およびインクの液滴サイズを制御する。液滴制御部１０１は、処理液およびインクの液滴サイズを複数のサイズに調整可能に構成されている。液滴のサイズの種類は特に限定されないが、ここでは、小ドット、中ドット、および大ドットである。液滴制御部１０１は、ここでは、小ドット、中ドット、および大ドットの液滴を形成可能な駆動信号の一部または全部を第１記録ヘッド５０および第２記録ヘッド６０の各アクチュエータに印加することにより、液滴のサイズを制御する。液滴制御部１０１は、例えば、駆動信号の一部を第１記録ヘッド５０および第２記録ヘッド６０の各アクチュエータに印加することにより、小ドットの液滴を形成する。液滴制御部１０１は、駆動信号の他の一部をさらに第１記録ヘッド５０および第２記録ヘッド６０の各アクチュエータに印加することにより、中ドットの液滴を形成する。液滴制御部１０１は、駆動信号のさらに他の一部を第１記録ヘッド５０および第２記録ヘッド６０の各アクチュエータに印加することにより、大ドットの液滴を形成する。 The droplet control unit 101 controls droplet sizes of treatment liquid and ink. The droplet control unit 101 is configured to be able to adjust the droplet size of the treatment liquid and ink to a plurality of sizes. Although the types of droplet sizes are not particularly limited, they are small dots, medium dots, and large dots here. Here, the droplet control unit 101 applies part or all of the drive signals capable of forming droplets of small dots, medium dots, and large dots to the actuators of the first recording head 50 and the second recording head 60. to control the droplet size. The droplet control unit 101 forms droplets of small dots by, for example, applying part of the drive signal to each actuator of the first recording head 50 and the second recording head 60 . The droplet control unit 101 further applies another part of the drive signal to the actuators of the first recording head 50 and the second recording head 60 to form medium-dot droplets. The droplet control unit 101 applies another part of the drive signal to the actuators of the first recording head 50 and the second recording head 60 to form large dot droplets.
　メディア選択部１０２は、記録媒体５のインク濡れ性に関する予め定められたランクのうちから１つのランクを選択可能に構成されている。記録媒体５のインク濡れ性に関するランクの構成は特に限定されないが、ここでは、「濡れ性大」、「濡れ性中」、および「濡れ性小」の３段階で構成されている。ユーザーは、操作画面を介して記録媒体５の濡れ性のランクを択一的に選択する。メディア選択部１０２は、操作パネル１２０に選択画面を表示させてもよく、プリンタ１０に接続されたコンピュータ等に選択画面を表示させてもよい。メディア選択部１０２は、記録媒体５の種類（例えば、記録紙、塩化ビニル等）を選択するように構成され、選択された記録媒体５の種類から、記録媒体５のインク濡れ性に関するランクを求めてもよい。「記録媒体５の濡れ性のランクを選択する」ことには、このように、記録媒体５の種類の選択を介して記録媒体５のインク濡れ性に関するランクを選択することも含まれる。 The media selection unit 102 is configured to be able to select one rank from among predetermined ranks regarding ink wettability of the recording medium 5 . Although there is no particular limitation on the structure of the rank regarding the ink wettability of the recording medium 5, here, it is composed of three levels of "high wettability", "medium wettability", and "low wettability". The user alternatively selects the wettability rank of the recording medium 5 via the operation screen. The media selection unit 102 may cause the operation panel 120 to display the selection screen, or may cause the computer or the like connected to the printer 10 to display the selection screen. The medium selection unit 102 is configured to select the type of the recording medium 5 (for example, recording paper, vinyl chloride, etc.), and obtains the ink wettability rank of the recording medium 5 from the selected type of the recording medium 5. may "Selecting the wettability rank of the recording medium 5" thus includes selecting the ink wettability rank of the recording medium 5 through selection of the recording medium 5 type.
　画質選択部１０３は、予め定められた複数の画質のうちから１つの画質を選択可能に構成されている。複数の画質の構成は特に限定されないが、ここでは、「高品質モード」、「標準モード」、および「高速モード」の３段階で構成されている。高品質モードは、高解像度で印刷画質の良いモードだが、印刷速度は遅い。高速モードは、低解像度の印刷モードであり、印刷速度は速い。標準モードは、高品質モードと高速モードの中間的なモードである。標準モードでは、解像度は、高品質モードよりも低く、高速モードよりも高い。標準モードでは、印刷速度は、高品質モードよりも速く、高速モードよりも遅い。画質選択部１０３は、操作パネル１２０に選択画面を表示させてもよく、プリンタ１０に接続されたコンピュータ等に選択画面を表示させてもよい。 The image quality selection unit 103 is configured to be able to select one image quality from a plurality of predetermined image qualities. Although the configuration of the plurality of image quality is not particularly limited, here, it is configured in three stages of "high quality mode", "standard mode", and "high speed mode". The high quality mode is a mode with high resolution and good print quality, but the print speed is slow. The high speed mode is a low resolution print mode, and the print speed is fast. Standard mode is an intermediate mode between high quality mode and high speed mode. In standard mode the resolution is lower than in high quality mode and higher than in high speed mode. In standard mode, the print speed is faster than in high quality mode and slower than in high speed mode. The image quality selection unit 103 may cause the operation panel 120 to display the selection screen, or may cause the computer or the like connected to the printer 10 to display the selection screen.
　条件記憶部１０４は、記録媒体５のインク濡れ性のランクと第１記録ヘッド５０によって吐出される処理液の吐出密度とが紐づけされたテーブルＴ１を記憶している。図４は、テーブルＴ１の一例を示す図である。図４に示すように、本実施形態では、テーブルＴ１は、記録媒体５のインク濡れ性のランクと画質とのマトリクスと、第１記録ヘッド５０によって吐出される処理液の吐出密度とを紐づけている。ただし、テーブルＴ１は、記録媒体５のインク濡れ性のランクと第１記録ヘッド５０によって吐出される処理液の吐出密度とを紐づけするものであればよく、印刷画質と処理液の吐出密度とを紐づけていなくてもよい。ここで、「処理液の吐出密度」とは、記録媒体５上の所定の面積当たりに吐出される処理液の量を意味する。詳しくは後述するが、本実施形態では、処理液の液滴サイズは小ドットしかないため、「処理液の吐出密度」とは、小ドットの処理液が吐出された画素の割合を意味してもよい。以下、処理液の吐出範囲の全ての画素に小ドットの処理液が１回ずつ着弾したときの吐出密度を吐出密度１００％と呼ぶこととする。 The condition storage unit 104 stores a table T1 in which the ink wettability rank of the recording medium 5 and the ejection density of the treatment liquid ejected by the first recording head 50 are linked. FIG. 4 is a diagram showing an example of the table T1. As shown in FIG. 4, in the present embodiment, the table T1 associates the matrix of the ink wettability rank and the image quality of the recording medium 5 with the ejection density of the treatment liquid ejected by the first recording head 50. ing. However, the table T1 only needs to associate the ink wettability rank of the recording medium 5 with the ejection density of the treatment liquid ejected by the first recording head 50. may not be linked. Here, the “treatment liquid ejection density” means the amount of treatment liquid ejected per predetermined area on the recording medium 5 . Although the details will be described later, in the present embodiment, the droplet size of the treatment liquid is only small dots, so the "discharge density of the treatment liquid" means the ratio of pixels onto which small dots of the treatment liquid are discharged. good too. Hereinafter, the ejection density when a small dot of the treatment liquid lands once on every pixel in the ejection range of the treatment liquid is referred to as an ejection density of 100%.
　テーブルＴ１には、処理液の吐出密度として、処理液を吐出する処理液用ノズル列５１～５４の数が設定されている。図４に示すように、テーブルＴ１は、記録媒体５のインク濡れ性が大であって画質が高画質モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数を「１」としている。図４に示すように、記録媒体５のインク濡れ性が大であって画質が標準モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「１」である。記録媒体５のインク濡れ性が大であって画質が高速モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「２」である。画質選択部１０３によって選択可能な画質は、高速モードと、高速モードよりも印刷速度の遅い他のモード（ここでは、標準モードと高画質モード）とを含み、テーブルＴ１は、他のモードよりも高速モードで処理液の吐出密度を大きくするように構成されている。 In the table T1, the number of the processing liquid nozzle rows 51 to 54 for discharging the processing liquid is set as the processing liquid discharge density. As shown in FIG. 4, the table T1 sets the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid to "1" when the ink wettability of the recording medium 5 is high and the image quality is in the high image quality mode. and As shown in FIG. 4, when the ink wettability of the recording medium 5 is high and the image quality is in the standard mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "1". When the ink wettability of the recording medium 5 is high and the image quality is in the high-speed mode, the number of the treatment liquid nozzle rows 51 to 54 for ejecting the treatment liquid is "2". The image quality selectable by the image quality selection unit 103 includes a high-speed mode and other modes (here, standard mode and high-quality mode) whose printing speed is lower than that of the high-speed mode. It is configured to increase the ejection density of the treatment liquid in the high-speed mode.
　図４に示すように、一例に係るテーブルＴ１によれば、記録媒体５のインク濡れ性が中であって画質が高画質モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「１」である。記録媒体５のインク濡れ性が中であって画質が標準モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「２」である。記録媒体５のインク濡れ性が中であって画質が高速モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「３」である。記録媒体５のインク濡れ性が小であって画質が高画質モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「２」である。記録媒体５のインク濡れ性が小であって画質が標準モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「３」である。記録媒体５のインク濡れ性が小であって画質が高速モードの場合、処理液を吐出する処理液用ノズル列５１～５４の数は「４」である。 As shown in FIG. 4, according to the table T1 according to an example, when the ink wettability of the recording medium 5 is medium and the image quality is in the high image quality mode, the processing liquid nozzle arrays 51 to 54 ejecting the processing liquid are The number is "1". When the ink wettability of the recording medium 5 is medium and the image quality is in the standard mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "2". When the ink wettability of the recording medium 5 is medium and the image quality is in the high-speed mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "3". When the ink wettability of the recording medium 5 is small and the image quality is in the high image quality mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "2". When the ink wettability of the recording medium 5 is small and the image quality is in the standard mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "3". When the ink wettability of the recording medium 5 is small and the image quality is in the high-speed mode, the number of the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid is "4".
　このように、本実施形態では、テーブルＴ１は、インク濡れ性が大きい記録媒体５よりもインク濡れ性が小さい記録媒体５に対して処理液の吐出密度を大きくするように構成されている。また、処理液を吐出する処理液用ノズル列５１～５４の数が複数のときには、吐出密度１００％を越える密度で処理液が吐出される。すなわち、処理液の吐出範囲の全ての画素に処理液が少なくとも１回ずつ着弾するとともに、少なくとも一部の画素には、処理液が複数回着弾した状態となる。好ましくは、処理液を吐出する処理液用ノズル列５１～５４の数が「２」のときには、１００％を越え２００％を越えない密度で処理液が吐出される。処理液を吐出する処理液用ノズル列５１～５４の数が「３」のときには、２００％を越え３００％を越えない密度で処理液が吐出される。処理液を吐出する処理液用ノズル列５１～５４の数が「４」のときには、３００％を越え４００％を越えない密度で処理液が吐出される。ただし、テーブルＴ１に示す濡れ性と画質のマトリクス、および、それに紐づけられた処理液用ノズル列５１～５４の数は好適な一例に過ぎない。 Thus, in this embodiment, the table T1 is configured to increase the ejection density of the treatment liquid for the recording medium 5 with low ink wettability as compared to the recording medium 5 with high ink wettability. Further, when the number of the processing liquid nozzle rows 51 to 54 for ejecting the processing liquid is plural, the processing liquid is ejected at a density exceeding 100%. That is, the treatment liquid lands at least once on all the pixels in the ejection range of the treatment liquid, and the treatment liquid lands on at least some of the pixels a plurality of times. Preferably, when the number of the processing liquid nozzle rows 51 to 54 ejecting the processing liquid is "2", the processing liquid is ejected at a density exceeding 100% and not exceeding 200%. When the number of the processing liquid nozzle rows 51 to 54 ejecting the processing liquid is "3", the processing liquid is ejected at a density exceeding 200% and not exceeding 300%. When the number of the processing liquid nozzle rows 51 to 54 ejecting the processing liquid is "4", the processing liquid is ejected at a density exceeding 300% and not exceeding 400%. However, the matrix of wettability and image quality shown in the table T1 and the number of the processing liquid nozzle arrays 51 to 54 associated therewith are only suitable examples.
　算出部１０５は、メディア選択部１０２で選択された記録媒体５のインク濡れ性のランクと、テーブルＴ１とに基づいて処理液の吐出密度を算出する。本実施形態では、算出部１０５は、メディア選択部１０２で選択された記録媒体５のインク濡れ性のランクと、画質選択部１０３で選択された画質と、テーブルＴ１とに基づいて処理液の吐出密度を算出する。算出部１０５は、ここでは、テーブルＴ１に規定された本数の処理液用ノズル列５１～５４から処理液を吐出することを決定する。算出部１０５は、例えば、使用する処理液用ノズル列を均等化するように、処理液を吐出する処理液用ノズル列をローテーションさせてもよい。 The calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102 and the table T1. In this embodiment, the calculation unit 105 ejects the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102, the image quality selected by the image quality selection unit 103, and the table T1. Calculate the density. Here, the calculation unit 105 determines to eject the treatment liquid from the number of treatment liquid nozzle rows 51 to 54 defined in the table T1. For example, the calculation unit 105 may rotate the processing liquid nozzle arrays that eject the processing liquid so as to equalize the processing liquid nozzle arrays to be used.
　処理液吐出部１０６は、第１記録ヘッド５０を制御して、算出部１０５によって算出された吐出密度で処理液を記録媒体５に吐出させる。その際、処理液吐出部１０６は、最も小さいサイズの液滴（ここでは、小ドットの液滴）で処理液を吐出させる。インク吐出部１０７は、第２記録ヘッド６０を制御して、記録媒体５に着弾した処理液に重ねるようにインクを吐出させる。インク吐出部１０７は、選択された画質で画像が形成されるように第２記録ヘッド６０にＣＭＹＫインクを吐出させる。吐出されるインクの液滴サイズは、画像の密度に応じて、大ドット、中ドット、および小ドットが好適に混ぜ合わされている。処理液吐出部１０６は、第２記録ヘッド６０がインクを吐出する画素の周辺に、インクよりも先に処理液を吐出させる。 The treatment liquid ejection unit 106 controls the first recording head 50 to eject the treatment liquid onto the recording medium 5 at the ejection density calculated by the calculation unit 105 . At this time, the treatment liquid ejecting unit 106 ejects the treatment liquid in droplets of the smallest size (here, droplets of small dots). The ink ejection unit 107 controls the second recording head 60 to eject ink so as to overlap the treatment liquid that has landed on the recording medium 5 . The ink ejection unit 107 ejects CMYK inks to the second recording head 60 so as to form an image with the selected image quality. The droplet size of the ejected ink is preferably a mixture of large dots, medium dots, and small dots, depending on the density of the image. The treatment liquid ejection unit 106 ejects the treatment liquid before the ink to the periphery of the pixels to which the second recording head 60 ejects the ink.
　走査制御部１０８は、キャリッジモータ３４を制御して、キャリッジ２０を走査方向Ｙに移動させる。搬送制御部１０９は、フィードモータ４３を制御して、記録媒体５を搬送方向Ｘに搬送する。温度制御部１１０は、加熱装置７０を制御して、プラテン１２の温度をインクおよび処理液の乾燥に適した所定の温度に維持する。 The scanning control unit 108 controls the carriage motor 34 to move the carriage 20 in the scanning direction Y. The transport control unit 109 transports the recording medium 5 in the transport direction X by controlling the feed motor 43 . The temperature control unit 110 controls the heating device 70 to maintain the temperature of the platen 12 at a predetermined temperature suitable for drying the ink and treatment liquid.
　［印刷プロセス］
　以下では、処理液を使用した印刷のプロセスについて説明する。図５は、処理液を使用した印刷の一例を示すフローチャートである。図５に示すように、処理液を使用した印刷の一例によれば、ステップＳ０１において、記録媒体５のインク濡れ性のランクが大、中、および小の中から選択される。ステップＳ０１では、インク濡れ性が分かっている記録媒体５の種類が選択されてもよい。ステップＳ０２では、高画質モード、標準モード、および高速モードの中から画質が選択される。ステップＳ０３では、印刷する画像が入力される。ステップＳ０１～Ｓ０３の順番は入れ替えられてもよい。 [Print process]
The process of printing using the treatment liquid will be described below. FIG. 5 is a flow chart showing an example of printing using a treatment liquid. As shown in FIG. 5, according to an example of printing using a treatment liquid, in step S01, the ink wettability rank of the recording medium 5 is selected from high, medium, and low. In step S01, a type of recording medium 5 whose ink wettability is known may be selected. In step S02, the image quality is selected from among high image quality mode, standard mode and high speed mode. In step S03, an image to be printed is input. The order of steps S01 to S03 may be changed.
　ステップＳ０４では、入力された画像がハーフトーン処理され、各インクが吐出される画素が決定される。ステップＳ０５では、ハーフトーン処理の結果に基づいて処理液が吐出される範囲が決定されるとともに、選択された記録媒体５のインク濡れ性のランクおよび画質に応じて、テーブルＴ１に基づき、処理液の吐出密度と、使用する処理液用ノズル列５１～５４とが決定される。処理液が吐出される範囲は、インクが吐出される画素上であってもよく、さらにその周囲を含んでいてもよい。 In step S04, the input image is halftone-processed, and the pixels to which each ink is to be ejected are determined. In step S05, the range in which the treatment liquid is ejected is determined based on the result of the halftone processing, and the treatment liquid is determined based on the table T1 according to the ink wettability rank and image quality of the selected recording medium 5. and the processing liquid nozzle arrays 51 to 54 to be used are determined. The range over which the treatment liquid is ejected may be on the pixels onto which the ink is ejected, and may also include the periphery thereof.
　ステップＳ０６では、実際に記録媒体５上に処理液が吐出される。本実施形態では、処理液を吐出する処理液用ノズル列５１～５４は、インクを吐出するインク用ノズル列６１～６４よりも搬送方向Ｘの上流側Ｘ１に配置されている。ステップＳ０６では、処理液用ノズル列５１～５４のうちの決定された処理液用ノズル列から処理液が吐出される。次いで、ステップＳ０７で記録媒体５が搬送方向Ｘの下流側Ｘ２に搬送される。さらに、ステップＳ０８では、第２記録ヘッド６０のインク用ノズル列６１～６４から記録媒体５上の処理液に重ねてインクが吐出されるとともに、処理液用ノズル列５１～５４のうちの選択されたノズル列から、記録媒体５上の処理液が未吐出の領域に処理液が吐出される。図５に図示は省略するが、これを繰り返すことにより、処理液とインクとが記録媒体５上に重ねられていく。同じく図示は省略するが、印刷中は加熱装置７０が駆動され、プラテン１２をインクおよび処理液の乾燥に滴した所定の温度に維持している。なお、搬送方向Ｘの画素のピッチよりも第１記録ヘッド５０および第２記録ヘッド６０のノズル５１ａ～６４ａのピッチの方が大きい場合には、ステップＳ０７における記録媒体５の搬送距離は、いわゆるマルチパス印刷の手法に基づき、第１記録ヘッド５０および第２記録ヘッド６０のノズル列５１～６４の搬送方向Ｘの長さより短くてもよい。 In step S06, the treatment liquid is actually discharged onto the recording medium 5. In this embodiment, the treatment liquid nozzle arrays 51 to 54 for ejecting the treatment liquid are arranged on the upstream side X1 in the transport direction X from the ink nozzle arrays 61 to 64 for ejecting ink. In step S06, the treatment liquid is discharged from the determined treatment liquid nozzle row among the treatment liquid nozzle rows 51-54. Next, the recording medium 5 is transported to the downstream side X2 in the transport direction X in step S07. Further, in step S08, ink is ejected from the ink nozzle arrays 61 to 64 of the second recording head 60 so as to overlap the treatment liquid on the recording medium 5, and one of the treatment liquid nozzle arrays 51 to 54 is selected. The processing liquid is ejected from the nozzle arrays on the recording medium 5 to areas where the processing liquid has not yet been ejected. Although not shown in FIG. 5, the treatment liquid and the ink are superimposed on the recording medium 5 by repeating this process. Although not shown, the heating device 70 is driven during printing to maintain the platen 12 at a predetermined temperature for drying the ink and processing liquid. Note that when the pitch of the nozzles 51a to 64a of the first recording head 50 and the second recording head 60 is larger than the pitch of pixels in the transport direction X, the transport distance of the recording medium 5 in step S07 is a so-called multi It may be shorter than the length in the transport direction X of the nozzle rows 51 to 64 of the first recording head 50 and the second recording head 60 based on the pass printing method.
　図６は、処理液用ノズル列５１～５４のうちの１つのノズル列を使用して処理液を吐出する場合の処理液およびインクのドットの模式図である。図６に図示されたグリットは、画素を表している。処理液の小ドットは、符号Ｄｏで表す。インクのドットは、符号Ｄｉで表す。インクのドットＤｉの液滴サイズは、最も大きく図示されたものが大ドット、最も小さく図示されたものが小ドット、両者の中間サイズが中ドットとする。図７についても同様である。 FIG. 6 is a schematic diagram of treatment liquid and ink dots when one of the treatment liquid nozzle arrays 51 to 54 is used to eject the treatment liquid. The grid illustrated in FIG. 6 represents pixels. A small dot of treatment liquid is denoted by Do. A dot of ink is denoted by the symbol Di. Regarding the droplet size of the ink dots Di, the largest shown is a large dot, the smallest shown is a small dot, and the intermediate size between the two is a medium dot. The same applies to FIG. 7 as well.
　図６に示すように、使用する処理液用ノズル列５１～５４が１つの場合、吐出密度１００％（処理液の吐出範囲の全ての画素に処理液の小ドットＤｏが１回ずつ着弾した状態）までの吐出密度で処理液を記録媒体５に着弾させることができる。面積当たりの処理液の量が同じであれば、全ての処理液の液滴サイズを小ドットとすることにより、中ドットまたは大ドットを使用するよりも処理液のドット同士の間隔を小さくすることができる。これにより、図６に示すように、インクのドットＤｉと処理液のドットＤｏとが出会う確率を高めることができる。 As shown in FIG. 6, when only one treatment liquid nozzle row 51 to 54 is used, the ejection density is 100% (a state in which the small dots Do of the treatment liquid have landed once on all pixels in the ejection range of the treatment liquid). ), the treatment liquid can be deposited on the recording medium 5 at an ejection density of up to ). If the amount of treatment liquid per area is the same, by making the droplet size of all the treatment liquid small dots, the spacing between the dots of the treatment liquid is smaller than when medium dots or large dots are used. can be done. As a result, as shown in FIG. 6, the probability that ink dots Di and treatment liquid dots Do meet can be increased.
　しかしながら、図６のような場合でも、記録媒体５のインク濡れ性や画質によっては、インクと処理液とを十分に反応させるためには、インクに対する処理液の量が不十分なことがある。詳しくは、インク濡れ性が小さい記録媒体５を使用した場合には、処理液が記録媒体５上で濡れ広がりにくい。そのため、処理液の吐出密度がより高いことが好ましい。また、高速モードの場合には、処理液が記録媒体５上で濡れ広がる時間が少なく、そのため、処理液が記録媒体５上で濡れ広がらない傾向がある。従って、処理液の吐出密度がより高いことが好ましい。本実施形態では、この点に鑑み、処理液の吐出密度が１００％では不足と判断される場合には、複数の処理液用ノズル列５１～５４から処理液を吐出させることにより、処理液の吐出密度を１００％を越える密度とする。 However, even in the case of FIG. 6, depending on the ink wettability of the recording medium 5 and the image quality, the amount of treatment liquid may be insufficient for the ink in order to sufficiently react the ink and the treatment liquid. Specifically, when the recording medium 5 having low ink wettability is used, the treatment liquid is less likely to spread on the recording medium 5 . Therefore, it is preferable that the ejection density of the treatment liquid is higher. Further, in the high-speed mode, the processing liquid does not spread on the recording medium 5 for a short period of time. Therefore, it is preferable that the ejection density of the treatment liquid is higher. In view of this point, in the present embodiment, when it is determined that the ejection density of the treatment liquid is insufficient at 100%, the treatment liquid is ejected from the plurality of nozzle rows 51 to 54 for the treatment liquid. The ejection density is set to a density exceeding 100%.
　図７は、処理液用ノズル列５１～５４のうちの複数のノズル列を使用して処理液を吐出する場合の処理液およびインクのドットの模式図である。図７に示すように、複数の処理液用ノズル列５１～５４を使用して処理液を吐出すると、処理液の吐出範囲の全ての画素に処理液のドットＤｏが少なくとも１回ずつ着弾するとともに、少なくとも一部の画素には、処理液のドットＤｏが複数回着弾した状態を形成することができる。これにより、処理液の吐出密度（面積当たりの処理液の量）を増量し、処理液とインクとの反応を促進することができる。 FIG. 7 is a schematic diagram of treatment liquid and ink dots when the treatment liquid is ejected using a plurality of nozzle rows among the treatment liquid nozzle rows 51 to 54 . As shown in FIG. 7, when the treatment liquid is ejected using the plurality of treatment liquid nozzle rows 51 to 54, the dots Do of the treatment liquid land at least once on all pixels in the ejection range of the treatment liquid. , a state in which dots Do of the treatment liquid have landed a plurality of times can be formed in at least some of the pixels. As a result, the ejection density of the treatment liquid (the amount of treatment liquid per unit area) can be increased, and the reaction between the treatment liquid and the ink can be promoted.
　［実施形態の作用効果］
　以下では、本実施形態に係るプリンタ１０によって奏することができる作用効果について説明する。 [Action and effect of the embodiment]
The effects that can be achieved by the printer 10 according to this embodiment will be described below.
　本実施形態に係るプリンタ１０は、インクと反応することによりインクを記録媒体５に定着させる処理液を記録媒体５に吐出する第１記録ヘッド５０と、記録媒体５にインクを吐出する第２記録ヘッド６０と、第１記録ヘッド５０および第２記録ヘッド６０を制御する制御装置１００と、を備えている。制御装置１００は、メディア選択部１０２と、条件記憶部１０４と、算出部１０５と、処理液吐出部１０６と、インク吐出部１０７と、を備えている。メディア選択部１０２は、記録媒体５のインク濡れ性に関する予め定められたランクのうちから１つのランクを選択可能に構成されている。条件記憶部１０４は、記録媒体５のインク濡れ性のランクと第１記録ヘッド５０によって吐出される処理液の吐出密度とが紐づけされたテーブルＴ１を記憶している。算出部１０５は、メディア選択部１０２で選択された記録媒体５のインク濡れ性のランクとテーブルＴ１とに基づいて処理液の吐出密度を算出する。処理液吐出部１０６は、第１記録ヘッド５０を制御して、算出部１０５によって算出された吐出密度で処理液を記録媒体５に吐出させる。インク吐出部１０７は、第２記録ヘッド６０を制御して、記録媒体５に着弾した処理液に重ねるようにインクを吐出させる。かかるプリンタ１０によれば、記録媒体５のインク濡れ性に起因する記録媒体５における処理液の濡れ広がりの程度に応じて、処理液の吐出密度を調整することができる。これにより、記録媒体５によらずインクを処理液と十分に反応させ、記録媒体５に定着することができる。 The printer 10 according to the present embodiment includes a first recording head 50 that ejects onto the recording medium 5 a treatment liquid that fixes the ink on the recording medium 5 by reacting with the ink, and a second recording head that ejects the ink onto the recording medium 5 . It includes a head 60 and a control device 100 that controls the first recording head 50 and the second recording head 60 . The control device 100 includes a media selection section 102 , a condition storage section 104 , a calculation section 105 , a treatment liquid ejection section 106 and an ink ejection section 107 . The medium selection unit 102 is configured to be able to select one rank from among predetermined ranks regarding ink wettability of the recording medium 5 . The condition storage unit 104 stores a table T1 in which the ink wettability rank of the recording medium 5 and the discharge density of the treatment liquid discharged by the first recording head 50 are linked. The calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102 and the table T1. The treatment liquid ejection unit 106 controls the first recording head 50 to eject the treatment liquid onto the recording medium 5 at the ejection density calculated by the calculation unit 105 . The ink ejection unit 107 controls the second recording head 60 to eject ink so as to overlap the treatment liquid that has landed on the recording medium 5 . According to this printer 10 , the ejection density of the treatment liquid can be adjusted according to the degree of wetting and spreading of the treatment liquid on the recording medium 5 due to the ink wettability of the recording medium 5 . As a result, the ink can sufficiently react with the treatment liquid and be fixed on the recording medium 5 regardless of the recording medium 5 .
　本実施形態では、テーブルＴ１は、インク濡れ性が大きい記録媒体５よりもインク濡れ性が小さい記録媒体５に対して処理液の吐出密度を大きくするように構成されている。このようにする理由は、前述した通りである。これにより、インク濡れ性が小さい記録媒体５に対しても、インクを十分に定着させることができる。 In this embodiment, the table T1 is configured to increase the ejection density of the treatment liquid for the recording medium 5 with low ink wettability as compared to the recording medium 5 with high ink wettability. The reason for doing so is as described above. As a result, the ink can be sufficiently fixed even on the recording medium 5 with low ink wettability.
　本実施形態では、第１記録ヘッド５０は、処理液を吐出する複数のノズル５１ａ～５４ａをそれぞれ備えた複数の処理液用ノズル列５１～５４を備えている。テーブルＴ１には、処理液の吐出密度として、処理液を吐出する処理液用ノズル列５１～５４の数が設定されている。かかる構成によれば、処理液を吐出する処理液用ノズル列５１～５４の数を増減させることにより、処理液の吐出密度を増減させることができる。 In this embodiment, the first recording head 50 includes a plurality of treatment liquid nozzle rows 51 to 54 each having a plurality of nozzles 51a to 54a for ejecting treatment liquid. In the table T1, the number of the processing liquid nozzle rows 51 to 54 for discharging the processing liquid is set as the discharge density of the processing liquid. According to this configuration, the ejection density of the treatment liquid can be increased or decreased by increasing or decreasing the number of the treatment liquid nozzle rows 51 to 54 that eject the treatment liquid.
　本実施形態に係るプリンタ１０は、第１記録ヘッド５０および第２記録ヘッド６０を保持するキャリッジ２０と、キャリッジ２０を走査方向Ｙに移動させるキャリッジ移動装置３０と、を備えている。複数の処理液用ノズル列５１～５４は、走査方向Ｙに並んで設けられている。かかる構成によれば、走査方向に並んだ複数の処理液用ノズル列５１～５４のうちの選択されたノズル列を同時に使用することにより、処理液の吐出に要する時間を処理液の吐出密度によらず同じにすることができる。つまり、処理液の吐出密度を大きくしても、処理液の吐出に要する時間の増加を抑制することができる。 The printer 10 according to this embodiment includes a carriage 20 that holds the first recording head 50 and the second recording head 60, and a carriage moving device 30 that moves the carriage 20 in the scanning direction Y. A plurality of processing liquid nozzle rows 51 to 54 are arranged side by side in the scanning direction Y. As shown in FIG. According to this configuration, by simultaneously using selected nozzle rows from among the plurality of treatment liquid nozzle rows 51 to 54 arranged in the scanning direction, the time required to eject the treatment liquid can be adjusted to the ejection density of the treatment liquid. You can do the same regardless. That is, even if the ejection density of the treatment liquid is increased, it is possible to suppress an increase in the time required to eject the treatment liquid.
　なお、キャリッジ移動装置３０は、キャリッジ２０および記録媒体５のうちの少なくとも一方を移動させることにより、キャリッジ２０を記録媒体５に対して走査方向Ｙに移動させる移動装置であればよい。移動装置は、記録媒体５を走査方向Ｙに移動させてもよく、キャリッジ２０および記録媒体５の両方を走査方向Ｙに移動させてもよい。 The carriage moving device 30 may be any moving device that moves at least one of the carriage 20 and the recording medium 5 to move the carriage 20 in the scanning direction Y with respect to the recording medium 5 . The moving device may move the recording medium 5 in the scanning direction Y, or may move both the carriage 20 and the recording medium 5 in the scanning direction Y.
　本実施形態に係るプリンタ１０は、記録媒体５を走査方向Ｙに直交する搬送方向Ｘに移動させる搬送装置４０を備えている。搬送方向Ｘには、印刷方向の上流側Ｘ１と下流側Ｘ２とが設定されている。第２記録ヘッド６０は、インクを吐出する複数のノズル６１ａ～６４ａをそれぞれ備えたインク用ノズル列６１～６４を備えている。複数の処理液用ノズル列５１～５４は、インク用ノズル列６１～６４よりも搬送方向Ｘの上流側Ｘ１に設けられている。かかる構成によれば、第１記録ヘッド５０による処理液の吐出と、第２記録ヘッド６０によるインクの吐出とを並行して行うことができる。そのため、画像の形成に要する時間を短くすることができる。 The printer 10 according to this embodiment includes a conveying device 40 that moves the recording medium 5 in the conveying direction X orthogonal to the scanning direction Y. In the transport direction X, an upstream side X1 and a downstream side X2 in the printing direction are set. The second recording head 60 includes ink nozzle arrays 61 to 64 each having a plurality of nozzles 61a to 64a for ejecting ink. The plurality of treatment liquid nozzle rows 51-54 are provided on the upstream side X1 in the transport direction X from the ink nozzle rows 61-64. According to such a configuration, the ejection of the treatment liquid by the first recording head 50 and the ejection of the ink by the second recording head 60 can be performed in parallel. Therefore, the time required for image formation can be shortened.
　なお、搬送装置４０も、記録媒体５およびキャリッジ２０のうちの少なくとも一方を移動させることにより、記録媒体５をキャリッジ２０に対して搬送方向Ｘに移動させる移動装置であればよい。移動装置は、キャリッジ２０を搬送方向Ｘに移動させてもよく、キャリッジ２０および記録媒体５の両方を搬送方向Ｘに移動させてもよい。 The conveying device 40 may also be a moving device that moves the recording medium 5 in the conveying direction X with respect to the carriage 20 by moving at least one of the recording medium 5 and the carriage 20 . The moving device may move the carriage 20 in the transport direction X, or may move both the carriage 20 and the recording medium 5 in the transport direction X.
　本実施形態では、制御装置１００は、処理液およびインクの液滴サイズを複数のサイズに調整可能な液滴制御部１０１を備えている。処理液吐出部１０６は、最も小さいサイズの液滴で処理液を吐出させる。かかる構成によれば、同じ吐出密度（面積当たりの処理液の量）で処理液のドットＤｏを形成したとき、処理液のドットＤｏ同士の間の間隔が最も小さくなる。言い換えると、同じ吐出密度（面積当たりの処理液の量）で処理液のドットＤｏを形成したとき、処理液のドットＤｏの数が最も多くなる。そのため、インクのドットＤｉと処理液のドットＤｏとが出会う確率を高めることができる。 In this embodiment, the control device 100 includes a droplet control unit 101 capable of adjusting the droplet sizes of the treatment liquid and ink to a plurality of sizes. The treatment liquid ejection unit 106 ejects the treatment liquid with the smallest droplet size. According to this configuration, when the dots Do of the treatment liquid are formed with the same ejection density (the amount of the treatment liquid per area), the distance between the dots Do of the treatment liquid is the smallest. In other words, when the dots Do of the treatment liquid are formed with the same ejection density (the amount of the treatment liquid per area), the number of the dots Do of the treatment liquid is the largest. Therefore, the probability that ink dots Di and treatment liquid dots Do meet can be increased.
　本実施形態では、制御装置１００は、予め定められた複数の画質のうちから１つの画質を選択可能に構成された画質選択部１０３を備えている。テーブルＴ１は、記録媒体５のインク濡れ性のランクと画質とのマトリクスと、第１記録ヘッド５０によって吐出される処理液の吐出密度とを紐づけている。算出部１０５は、メディア選択部１０２で選択された記録媒体５のインク濡れ性のランクと、画質選択部１０３で選択された画質と、テーブルＴ１とに基づいて処理液の吐出密度を算出する。かかる構成によれば、記録媒体５のインク濡れ性だけでなく画質も考慮した処理液の吐出密度が得られる。そのため、より緻密に印刷品質（少なくとも画質とインク定着の信頼性とを含む品質）を管理することができる。 In this embodiment, the control device 100 includes an image quality selection unit 103 configured to select one image quality from a plurality of predetermined image qualities. The table T<b>1 associates the matrix of the ink wettability rank and the image quality of the recording medium 5 with the discharge density of the treatment liquid discharged by the first recording head 50 . The calculation unit 105 calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium 5 selected by the media selection unit 102, the image quality selected by the image quality selection unit 103, and the table T1. According to such a configuration, it is possible to obtain the ejection density of the treatment liquid in consideration of not only the ink wettability of the recording medium 5 but also the image quality. Therefore, print quality (at least quality including image quality and reliability of ink fixation) can be managed more precisely.
　本実施形態では、画質選択部１０３によって選択可能な画質は、高速モードと、高速モードよりも印刷速度の遅い他のモード（ここでは、標準モードおよび高画質モード）とを含んでいる。テーブルＴ１は、他のモードよりも高速モードで処理液の吐出密度を大きくするように構成されている。このようにする理由は、前述した通りである。これにより、処理液の濡れ広がり時間が短い高速モードでも、インクを十分に定着させることができる。 In this embodiment, the image quality selectable by the image quality selection unit 103 includes a high-speed mode and other modes (here, the standard mode and the high-quality mode) in which the printing speed is slower than the high-speed mode. The table T1 is configured to increase the ejection density of the processing liquid in the high-speed mode compared to other modes. The reason for doing so is as described above. As a result, even in the high-speed mode in which the wetting and spreading time of the treatment liquid is short, the ink can be sufficiently fixed.
　［他の実施形態］
　以上、好適な一実施形態について説明した。しかし、上記した実施形態は例示に過ぎず、ここに開示する技術は他の種々の形態で実施することができる。 [Other embodiments]
A preferred embodiment has been described above. However, the above-described embodiments are merely examples, and the technology disclosed herein can be implemented in various other forms.
　例えば、上記した実施形態では、処理液の吐出密度（面積当たりの処理液の量）は、処理液用ノズル列５１～５４のうち処理液を吐出させるノズル列の数を調整することによって調整された。しかし、処理液の吐出密度の調整方式は、これに限定されない。処理液の吐出密度は、例えば、面積当たりの処理液のドットの数を１画素につき１ドットを上限ととした上で、不足分または過剰分は処理液の一部または全部の液滴サイズを増減することによって調整されてもよい。または、処理液の吐出密度は、例えば、第１記録ヘッドが処理液を吐出する回数によって調整されてもよい。例えば、その場合、使用される処理液用ノズル列の数は一定であってもよく、第１記録ヘッドが処理液を吐出しながら走査される回数が調整されてもよい。処理液の吐出密度の調整方式は、特に限定されない。 For example, in the above-described embodiment, the ejection density of the treatment liquid (amount of treatment liquid per area) is adjusted by adjusting the number of nozzle rows from which the treatment liquid is ejected among the treatment liquid nozzle rows 51 to 54. Ta. However, the method of adjusting the ejection density of the treatment liquid is not limited to this. Regarding the discharge density of the treatment liquid, for example, the upper limit of the number of dots of the treatment liquid per area is set to 1 dot per pixel, and the shortage or excess is determined by adjusting the droplet size of part or all of the treatment liquid. It may be adjusted by increasing or decreasing. Alternatively, the ejection density of the treatment liquid may be adjusted, for example, by the number of times the first print head ejects the treatment liquid. For example, in that case, the number of processing liquid nozzle rows to be used may be constant, and the number of times the first print head is scanned while ejecting the processing liquid may be adjusted. A method for adjusting the ejection density of the treatment liquid is not particularly limited.
　テーブルにおいて、記録媒体のインク濡れ性とマトリクスを構成する要素は、画質に限定されない。前述したように、テーブルは、記録媒体のインク濡れ性だけに基づいて処理液の吐出密度を決定するものであってもよい。 In the table, the ink wettability of the recording medium and the elements that make up the matrix are not limited to image quality. As described above, the table may determine the ejection density of the treatment liquid based only on the ink wettability of the recording medium.
　インクジェットプリンタの構成は、上記したものに限定されない。インクジェットプリンタは、例えば、ロール状の記録媒体に対してプラテン上で印刷を行う、いわゆるロール・トゥー・ロールタイプのインクジェットプリンタでなくてもよい。インクジェットプリンタは、例えば、移動する支持台に載置された記録媒体に対して印刷を行う、いわゆるフラットベッドタイプのインクジェットプリンタであってもよい。処理液用ノズル列およびインク用ノズル列の配置は、いわゆるスタガ配置には限定されない。処理液用ノズル列とインク用ノズル列とは、走査方向に並んで配置されていてもよい。処理液用ノズル列とインク用ノズル列とは、搬送方向に一部が重なり、一部がずれるように配置されていてもよい。 The configuration of the inkjet printer is not limited to the above. The inkjet printer does not have to be, for example, a so-called roll-to-roll type inkjet printer that prints on a roll-shaped recording medium on a platen. The inkjet printer may be, for example, a so-called flatbed type inkjet printer that prints on a recording medium placed on a moving support base. The arrangement of the treatment liquid nozzle row and the ink nozzle row is not limited to the so-called staggered arrangement. The treatment liquid nozzle row and the ink nozzle row may be arranged side by side in the scanning direction. The treatment liquid nozzle row and the ink nozzle row may be arranged such that they are partially overlapped and partially misaligned in the transport direction.
　その他、特に言及されない限りにおいて、実施形態は本発明を限定しない。また、上記した技術は、可能である限りにおいて自在に組み合わせ得る。 In addition, the embodiments do not limit the present invention unless otherwise specified. Also, the techniques described above can be freely combined as far as possible.
５　　　記録媒体
１０　　インクジェットプリンタ
２０　　キャリッジ
３０　　キャリッジ移動装置（第１移動装置）
４０　　搬送装置（第２移動装置）
５０　　第１記録ヘッド
５１～５４　処理液用ノズル列（第１ノズル列）
５１ａ～５４ａ　ノズル（第１ノズル）
６０　　第２記録ヘッド
６１～６４　インク用ノズル列（第２ノズル列）
６１ａ～６４ａ　ノズル（第２ノズル）
１００　制御装置
１０１　液滴制御部
１０２　メディア選択部
１０３　画質選択部
１０４　条件記憶部（記憶部）
１０５　算出部
１０６　処理液吐出部
１０７　インク吐出部
Ｄｉ　　インクのドット
Ｄｏ　　処理液のドット
Ｔ１　　テーブル 5 recording medium 10 inkjet printer 20 carriage 30 carriage moving device (first moving device)
40 transport device (second moving device)
50 First recording head 51 to 54 Nozzle row for treatment liquid (first nozzle row)
51a to 54a nozzles (first nozzle)
60 Second recording head 61-64 Ink nozzle row (second nozzle row)
61a to 64a nozzles (second nozzles)
100 Control device 101 Droplet control unit 102 Media selection unit 103 Image quality selection unit 104 Condition storage unit (storage unit)
105 Calculation unit 106 Treatment liquid ejection unit 107 Ink ejection unit Di Ink dot Do Treatment liquid dot T1 Table

Claims (8)

  1. 　インクと反応することにより前記インクを記録媒体に定着させる処理液を前記記録媒体に吐出する第１記録ヘッドと、
    　前記記録媒体に前記インクを吐出する第２記録ヘッドと、
    　前記第１記録ヘッドおよび前記第２記録ヘッドを制御する制御装置と、を備え、
    　前記制御装置は、
    　　前記記録媒体のインク濡れ性に関する予め定められたランクのうちから１つのランクを選択可能に構成されたメディア選択部と、
    　　前記記録媒体のインク濡れ性のランクと前記第１記録ヘッドによって吐出される前記処理液の吐出密度とが紐づけされたテーブルを記憶する記憶部と、
    　　前記メディア選択部で選択された前記記録媒体のインク濡れ性のランクと前記テーブルとに基づいて前記処理液の吐出密度を算出する算出部と、
    　　前記第１記録ヘッドを制御して、前記算出部によって算出された吐出密度で前記処理液を前記記録媒体に吐出させる処理液吐出部と、
    　　前記第２記録ヘッドを制御して、前記記録媒体に着弾した前記処理液に重ねるように前記インクを吐出させるインク吐出部と、を備えた、
    インクジェットプリンタ。     a first recording head that ejects onto the recording medium a treatment liquid that reacts with the ink to fix the ink on the recording medium;
    a second recording head that ejects the ink onto the recording medium;
    a control device for controlling the first recording head and the second recording head;
    The control device is
    a media selection unit configured to be able to select one rank from among predetermined ranks regarding the ink wettability of the recording medium;
    a storage unit that stores a table in which the ink wettability rank of the recording medium and the ejection density of the treatment liquid ejected by the first recording head are linked;
    a calculation unit that calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium selected by the media selection unit and the table;
    a treatment liquid ejection unit that controls the first recording head to eject the treatment liquid onto the recording medium at the ejection density calculated by the calculation unit;
    an ink ejection unit that controls the second recording head to eject the ink so as to overlap the treatment liquid that has landed on the recording medium;
    inkjet printer.
  2. 　前記テーブルは、インク濡れ性が大きい前記記録媒体よりもインク濡れ性が小さい前記記録媒体に対して前記処理液の吐出密度を大きくするように構成されている、
    請求項１に記載のインクジェットプリンタ。     The table is configured to increase the ejection density of the treatment liquid for the recording medium with lower ink wettability than the recording medium with higher ink wettability.
    The inkjet printer according to claim 1.
  3. 　前記第１記録ヘッドは、前記処理液を吐出する複数の第１ノズルをそれぞれ備えた複数の第１ノズル列を備え、
    　前記テーブルには、前記処理液の吐出密度として、前記処理液を吐出する前記第１ノズル列の数が設定されている、
    請求項１または２に記載のインクジェットプリンタ。     The first recording head includes a plurality of first nozzle rows each including a plurality of first nozzles for ejecting the treatment liquid,
    In the table, the number of the first nozzle rows that eject the treatment liquid is set as the ejection density of the treatment liquid.
    The inkjet printer according to claim 1 or 2.
  4. 　前記第１記録ヘッドおよび前記第２記録ヘッドを保持するキャリッジと、
    　前記キャリッジおよび前記記録媒体のうちの少なくとも一方を移動させることにより、前記キャリッジを前記記録媒体に対して所定の走査方向に移動させる第１移動装置と、をさらに備え、
    　前記複数の第１ノズル列は、前記走査方向に並んで設けられている、
    請求項３に記載のインクジェットプリンタ。     a carriage that holds the first recording head and the second recording head;
    a first moving device that moves at least one of the carriage and the recording medium to move the carriage in a predetermined scanning direction with respect to the recording medium;
    The plurality of first nozzle rows are arranged side by side in the scanning direction,
    The inkjet printer according to claim 3.
  5. 　前記記録媒体および前記キャリッジのうちの少なくとも一方を移動させることにより、前記記録媒体を前記キャリッジに対して、前記走査方向に直交する搬送方向に移動させる第２移動装置をさらに備え、
    　前記搬送方向には、印刷方向の上流側と下流側とが設定されており、
    　前記第２記録ヘッドは、前記インクを吐出する複数の第２ノズルをそれぞれ備えた第２ノズル列を備え、
    　前記複数の第１ノズル列は、前記第２ノズル列よりも前記搬送方向の前記上流側に設けられている、
    請求項４に記載のインクジェットプリンタ。     a second moving device for moving at least one of the recording medium and the carriage to move the recording medium relative to the carriage in a transport direction perpendicular to the scanning direction;
    An upstream side and a downstream side of the printing direction are set in the transport direction,
    the second recording head includes a second nozzle row each including a plurality of second nozzles for ejecting the ink;
    The plurality of first nozzle rows are provided upstream of the second nozzle row in the transport direction,
    The inkjet printer according to claim 4.
  6. 　前記制御装置は、前記処理液および前記インクの液滴サイズを複数のサイズに調整可能な液滴制御部を備え、
    　前記処理液吐出部は、最も小さいサイズの液滴で前記処理液を吐出させる、
    請求項１～５のいずれか一つに記載のインクジェットプリンタ。     The control device includes a droplet control unit capable of adjusting droplet sizes of the treatment liquid and the ink to a plurality of sizes,
    The treatment liquid ejection unit ejects the treatment liquid in droplets of the smallest size.
    The inkjet printer according to any one of claims 1 to 5.
  7. 　前記制御装置は、予め定められた複数の画質のうちから１つの画質を選択可能に構成された画質選択部を備え、
    　前記テーブルは、前記記録媒体のインク濡れ性のランクと画質とのマトリクスと、前記第１記録ヘッドによって吐出される前記処理液の吐出密度とを紐づけており、
    　前記算出部は、前記メディア選択部で選択された前記記録媒体のインク濡れ性のランクと、前記画質選択部で選択された画質と、前記テーブルとに基づいて前記処理液の吐出密度を算出する、
    請求項１～６のいずれか一つに記載のインクジェットプリンタ。     The control device includes an image quality selection unit configured to be able to select one image quality from a plurality of predetermined image qualities,
    The table associates a matrix of ink wettability ranks and image quality of the recording medium with the ejection density of the treatment liquid ejected by the first recording head,
    The calculation unit calculates the ejection density of the treatment liquid based on the ink wettability rank of the recording medium selected by the medium selection unit, the image quality selected by the image quality selection unit, and the table. ,
    The inkjet printer according to any one of claims 1-6.
  8. 　前記画質選択部によって選択可能な画質は、高速モードと、前記高速モードよりも印刷速度の遅い他のモードとを含み、
    　前記テーブルは、前記他のモードよりも前記高速モードで前記処理液の吐出密度を大きくするように構成されている、
    請求項７に記載のインクジェットプリンタ。     The image quality selectable by the image quality selection unit includes a high-speed mode and another mode with a printing speed slower than the high-speed mode,
    The table is configured to increase the ejection density of the treatment liquid in the high-speed mode than in the other modes.
    The inkjet printer according to claim 7.
PCT/JP2023/007282 2022-03-02 2023-02-28 Inkjet printer WO2023167181A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120019588A1 (en) * 2010-02-12 2012-01-26 Ervin Mubarekyan Fixer fluid composition and inkjet ink sets including the same
JP2016076179A (en) * 2014-10-09 2016-05-12 セイコーエプソン株式会社 Printer and print specification determination method
JP2017109493A (en) * 2015-12-16 2017-06-22 キヤノン株式会社 Recording device and recording method
JP2020082481A (en) * 2018-11-22 2020-06-04 株式会社沖データ Inkjet printer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120019588A1 (en) * 2010-02-12 2012-01-26 Ervin Mubarekyan Fixer fluid composition and inkjet ink sets including the same
JP2016076179A (en) * 2014-10-09 2016-05-12 セイコーエプソン株式会社 Printer and print specification determination method
JP2017109493A (en) * 2015-12-16 2017-06-22 キヤノン株式会社 Recording device and recording method
JP2020082481A (en) * 2018-11-22 2020-06-04 株式会社沖データ Inkjet printer

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