WO2005105452A1 - インクジェット記録装置 - Google Patents
インクジェット記録装置 Download PDFInfo
- Publication number
- WO2005105452A1 WO2005105452A1 PCT/JP2005/007419 JP2005007419W WO2005105452A1 WO 2005105452 A1 WO2005105452 A1 WO 2005105452A1 JP 2005007419 W JP2005007419 W JP 2005007419W WO 2005105452 A1 WO2005105452 A1 WO 2005105452A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ink
- recording
- image
- auxiliary
- image recording
- Prior art date
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Classifications
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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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
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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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
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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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00218—Constructional details of the irradiation means, e.g. radiation source attached to reciprocating print head assembly or shutter means provided on the radiation source
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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
- B41J2/21—Ink jet for multi-colour printing
Definitions
- the present invention relates to an ink jet recording apparatus, and more particularly to an ink jet recording apparatus that uses an auxiliary recording ink such as a background ink and a transparent ink in addition to an image recording ink that mainly records an image.
- an auxiliary recording ink such as a background ink and a transparent ink in addition to an image recording ink that mainly records an image.
- ink jet recording apparatuses have been widely used because images can be formed easily and inexpensively as compared with methods requiring plate making such as a gravure printing method and a flexographic printing method. Become, become.
- images such as characters, symbols, and pictures are recorded on a transparent packaging material with a special color such as white as a background color.
- a transparent packaging material with a special color such as white as a background color.
- the background ink is discharged onto the surface of the recording medium in a solid manner, and then the front side is printed to record the force image, and the image is first printed on the back side of the recording medium.
- There is back printing which records and additionally applies background ink solidly.
- Ink-jet recording for recording an image using inks for recording each color image mainly for recording an image and auxiliary recording inks such as a background ink and a transparent ink for assisting image recording as described above.
- a recording head having a nozzle for discharging ink is provided, and recording is performed while discharging the ink from the recording head to a recording medium.
- a serial recording type ink jet recording device that reciprocates the recording head in the main scanning direction and conveys the recording medium in the sub-scanning direction that is orthogonal to the main scanning direction and records the image, the ink for image recording of each color is used.
- the auxiliary recording head located upstream of the image recording head in each of the forward direction and the backward direction.
- a background is recorded by ejecting ink from a solid color
- an image is recorded by ejecting ink based on image data from an image recording head.
- ink is not ejected from the auxiliary recording head located upstream of the image recording head in each of the forward direction and the backward direction.
- an auxiliary recording head located downstream of the image recording head ejects ink solidly to record a background.
- ink jet recording apparatus when performing front printing, ink is solidly ejected from an auxiliary recording head positioned upstream of the image recording head in the sub-scanning direction to solidify the background. After the recording medium on which the background is recorded is conveyed in the sub-scanning direction, an image is recorded by discharging ink from an image recording head on a portion where the background is recorded. .
- reverse printing ink is not ejected from the auxiliary recording head located upstream of the image recording head in the sub-scanning direction, and ink is ejected from the image recording head to record an image.
- ink is solidly ejected from the auxiliary recording head located downstream of the image recording head to the portion where the image has been recorded, to obtain a background image. Is being recorded.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-285422 Disclosure of the invention
- the auxiliary recording head is disposed on both sides of the image recording head in the main scanning direction, ie, on at least one of the upstream side and the downstream side in the sub scanning direction. Therefore, there is a problem that the carriage on which the respective heads are mounted and the entire apparatus are increased in size and the apparatus cost is increased. Further, when an auxiliary recording head is provided on at least one of the upstream side and the downstream side in the sub-scanning direction of the image recording head, the area of the platen supporting the recording medium increases, and the platen and the recording medium are increased. If the transfer accuracy is reduced due to friction or suction force with the toner and the image quality is reduced, there is a problem.
- the ink ejected first is ejected in order to prevent the ink ejected repeatedly from being mixed or bleeding with each other. After the ink is irradiated with light and cured, and the ink is fixed on the recording medium, it is necessary to discharge the next ink.
- a light irradiation device that irradiates the ink that has landed on the recording medium with light is provided by the image recording head and the light irradiation device.
- the head unit consisting of the auxiliary recording head must be provided not only at both sides in the main scanning direction in the main scanning direction, but also between the image recording head and the auxiliary recording head. There has been a problem that image quality is reduced due to heat generation of the device and power consumption is increased.
- the image recording head is simplified in order to simplify the configuration of the light irradiation device.
- the light irradiating device is operated by the sub-scanning of the image recording head and the auxiliary recording ink recording head Since the light irradiation device is provided from the upstream end to the downstream end in the direction, the size of the light irradiating device is increased, so that there is a problem that image quality is reduced due to heat generation and power consumption is increased.
- an ink jet recording apparatus ejects an image recording ink to a recording medium conveyed in a sub-scanning direction orthogonal to the main scanning direction while reciprocating in the main scanning direction.
- An auxiliary recording head for discharging an image to the recording medium while reciprocating an auxiliary recording ink for assisting image recording in the main scanning direction;
- the auxiliary recording head includes an auxiliary recording nozzle array in which a plurality of nozzles are arranged so as to be able to eject ink in the sub-scanning direction.
- the image recording nozzle array and the auxiliary recording nozzle array are arranged in parallel in the sub-scanning direction, and the image recording nozzle array and the auxiliary recording nozzle array are arranged in accordance with a recording mode.
- a control unit that controls the image recording nozzle array and the auxiliary recording nozzle array so as to select a nozzle for ejecting ink from the auxiliary recording nozzle array and change each ink ejection area.
- FIG. 1 is a plan view showing a configuration of an embodiment of an inkjet recording apparatus according to the present invention.
- FIG. 2 is a block diagram illustrating a configuration of an inkjet recording apparatus according to the embodiment.
- FIG. 3 is a schematic diagram illustrating ink ejection areas in an image recording head and an auxiliary recording head of the inkjet recording apparatus according to the embodiment.
- FIG. 4 is a schematic diagram illustrating an ink ejection area in an image recording head and an auxiliary recording head of an ink jet recording apparatus according to a second embodiment.
- FIG. 5 is a schematic diagram illustrating an ink ejection area in an image recording head and an auxiliary recording head of an ink jet recording apparatus according to a third embodiment.
- FIGS. 1 to 3 a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
- FIG. 1 shows an embodiment of an ink jet recording apparatus according to the present invention, and is a serial head type ink jet recording apparatus 1.
- Figure 1 shows the inkjet recording device 1. As shown, it has a bar-shaped guide rail 2, and a carriage 3 is supported on the guide rail 2. The carriage 3 is reciprocated in the main running direction X along the guide rail 2 by a carriage drive mechanism 4 (see FIG. 2).
- an image recording ink for mainly recording an image for example, yellow (Y), magenta (M), cyan (C), and black (K) color inks
- An image recording head 6 having nozzles (not shown) formed on the recording medium 5 and an auxiliary recording ink for assisting image recording, the background of an image recorded by the image recording ink.
- Auxiliary recording heads 7 each having a nozzle for ejecting white ink (W) for white solid coating are mounted in a row in the main scanning direction X.
- the ink used in the present embodiment is an ultraviolet-curable ink that cures when irradiated with ultraviolet light.
- the ultraviolet curable ink include a radical polymerizable ink containing a radical polymerizable compound, a cationic polymerizable ink containing a cationic polymerizable compound as a polymerizable compound, and a radical polymerizable ink and a cationic polymerizable ink containing a cationic polymerizable compound.
- a hybrid type ink combined with an ink is applicable.
- the ink includes a polymerizable compound that is polymerized and cured by light other than ultraviolet light, and a photoinitiator that initiates a polymerization reaction between the polymerizable compounds by light other than ultraviolet light, for example, electron beam, X-ray, infrared light, or the like. May be applied.
- the recording medium 5 used in the ink jet recording apparatus 1 according to the present invention includes various types of paper such as plain paper, recycled paper, and glossy paper, various types of fabrics, various types of nonwoven fabrics, resins, metals, and glass. Although a strong recording medium 5 is applicable, in the present embodiment, a transparent non-absorbent resin film used for so-called soft packaging is particularly preferably used.
- an ultraviolet irradiation device as a light irradiation device for irradiating the ink ejected to the recording medium 5 with ultraviolet light. 8 are provided from the upstream end to the downstream end of the heads 6 and 7 in the sub-scanning direction Y in which the recording medium 5 is transported perpendicular to the main scanning direction X.
- the central portion of the movable range of the carriage 3 is a recording area where recording is performed on the recording medium 5, and a platen 9 that supports the recording medium 5 horizontally from the non-recording surface is provided in this recording area. Is provided.
- the inkjet recording apparatus 1 is provided with a transport mechanism 11 (see FIG. 2) that includes a plurality of transport rollers 10 and the like, and that transports the recording medium 5 in the sub scanning direction Y.
- the transport mechanism 11 intermittently transports the recording medium 5 by repeatedly transporting and stopping the recording medium 5 in accordance with the operation of the carriage 3 during image recording.
- a touch panel which displays a recording mode that can be selected by the user, and an input operation unit 12 that allows the user to select and input the displayed recording mode.
- the input operation unit 12 is connected to a control unit 13 described below, and outputs a signal related to the selected recording mode to the control unit 13 based on a predetermined operation. .
- FIG. 2 shows a control device for controlling the ink jet recording apparatus 1 according to the present embodiment.
- the control device includes, for example, a CPU, a RAM, and a ROM (none of which is shown).
- the control unit 13 has a control unit 13 for expanding the processing program recorded in the ROM into the RAM and executing the processing program by the CPU.
- control unit 13 controls each member based on the operation status of the carriage driving mechanism 4, the recording heads 6, 7, the transport mechanism 11, the ultraviolet irradiation device 8, and the like. Is controlled.
- the control unit 13 selects an ink ejection area 14 for ejecting ink from the image recording head 6 and the auxiliary recording head 7, respectively, according to the recording mode.
- the image recording head 6, the auxiliary recording head 7, the transport mechanism 11, and the like are controlled so that ink is ejected from the selected ink ejection area 14 to record an image.
- the recording modes include, for example, the following three recording modes. That is, in the normal mode in which an image is recorded using only the image recording ink, a white ink is discharged onto the surface of the recording medium 5 in a solid manner, and the top surface is printed using the image recording ink. And a back printing mode in which an image is recorded on the back surface of the recording medium 5 using the image recording ink, and white ink is discharged solidly from above.
- the control unit 13 changes to the state shown in FIG. As shown, the entire image recording head 6, that is, the entire nozzle row of the nozzles formed in each image recording head 6 and arranged in the sub-scanning direction Y is selected as the ink ejection area 14.
- an image may be recorded using an auxiliary recording ink such as a white ink as the image recording ink.
- the image recording head is a concept including an auxiliary recording head used for recording an image without using the auxiliary recording.
- the control unit 13 controls each image recording head 6 as shown in FIG.
- the downstream half area in the scanning direction Y is selected as the ink ejection area 14, and for the auxiliary recording head 7, the upstream half area in the sub-scanning direction Y of the nozzle row is used as the ink ejection area 14. Is to be selected.
- the control unit 13 controls the image recording heads 6 as shown in FIG.
- the upstream half area in the scanning direction Y is selected as the ink ejection area 14, and for the auxiliary recording head 7, the downstream half area in the sub scanning direction Y of the nozzle row is used as the ink ejection area. It is designed to be selected as 14.
- a recording mode is selected by the user and input from the input operation unit 12. Then, a signal related to the selected print mode is input to the control unit 13, and the control unit 13 determines an ink ejection area 14 according to the selected print mode. Then, the carriage driving mechanism 4 operates to move the carriage 3 reciprocally above the recording medium 5 in the main scanning direction X, and ink is ejected from the determined ink ejection area 14 in each head. The ejected ink sequentially lands on the recording medium 5, and the ink lands on the recording medium 5 is sequentially irradiated with ultraviolet rays by an ultraviolet irradiation device 8 reciprocating with the carriage 3, and the ink is applied to the recording medium 5. Hardens on top.
- the control section 13 sets the image recording head 6 as the overall ink ejection area 14, and uses all the nozzles to generate the image based on the image data. Predetermined nozzle force Each color ink is ejected. Then, in each of the forward direction and the sub direction, The ultraviolet light irradiating device 8 located on the downstream side of the image recording head 6 sequentially irradiates the ink that has landed on the recording medium 5 with ultraviolet light to cure the ink. As a result, an image with no background is recorded on the recording medium 5.
- the control unit 13 controls the downstream side of the nozzle row of the image recording head 6 in the sub-scanning direction Y and the nozzle row of the auxiliary recording head 7.
- the upstream area force in the sub-scanning direction Y is defined as the S ink ejection area 14, and for each main scan, white ink is solidly ejected from the nozzles on the upstream side of the auxiliary recording head, and the image recording head 6
- Each color ink is ejected from the downstream nozzle based on the image data.
- the ultraviolet light irradiating device 8 located on the downstream side in the main scanning direction X of the head unit sequentially irradiates the ink that has landed on the recording medium 5 with ultraviolet light.
- the ink ejection area 14 of the auxiliary recording head 7 is located upstream of the ink ejection area 14 of the image recording head 6 in the sub-scanning direction Y.
- the solid ink is conveyed in the sub-scanning direction Y, and In the next main scan, ink is ejected from the image recording head 6 to record an image. As a result, an image with a white background is recorded on the recording medium 5.
- the control unit 13 controls the nozzle array of the image recording head 6 in the upstream area in the sub-scanning direction Y and the nozzle array of the auxiliary recording head 7.
- the downstream area force in the sub-scanning direction Y is defined as the S ink ejection area 14, and the main surface of the recording medium 5 is discharged from the nozzle on the upstream side of the image recording head 6 for each main scan based on image data.
- Each color ink is ejected, and white ink is solidly ejected from the nozzle on the downstream side of the auxiliary recording head 7.
- the ultraviolet light irradiating device 8 located on the downstream side in the main running direction X of the head irradiates the ink which has landed on the recording medium 5 with ultraviolet rays sequentially.
- the ink ejection area 14 of the image recording head 6 is located upstream of the ink ejection area 14 of the auxiliary recording head 7 in the sub-scanning direction Y, After each color ink ejected from the image recording head 6 based on the image data is cured on the recording medium 5 by ultraviolet rays, a portion where this image is recorded is transported in the sub-scanning direction Y, and the portion is Then, in the next one main scan, the white ink is discharged onto the recording medium 5 from the auxiliary recording head 7. As a result, an image with a white background is recorded on the recording medium 5.
- the ink ejected on the upstream side should be selected so that it is located on the upstream side in the sub-scanning direction Y from the nozzle area where the ink is ejected. Since the ink is cured by the ultraviolet rays irradiated on the upstream side in the above, the auxiliary recording heads 7 are provided on both sides of the image recording head 6 and between the image recording head 6 and the auxiliary recording head 7. Also, if an ultraviolet irradiation device 8 is provided, it is not necessary.
- the ultraviolet irradiation device 8 is moved in the sub-scanning direction Y. In addition, it is not necessary to provide a length corresponding to the total head length of the auxiliary recording ink.
- the auxiliary recording heads 7 are provided on both sides of the image recording head 6, and the auxiliary recording heads 7 are provided on the upstream and downstream sides in the sub-scanning direction Y of the image recording head 6. Since it is not necessary to provide the recording head 7, the size of the carriage 3 on which each head is mounted and the entire apparatus can be reduced, and the apparatus cost can be reduced. In addition, since it is not necessary to increase the area of the platen 9 supporting the recording medium 5, a good image can be obtained without lowering the conveyance accuracy.
- an ultraviolet irradiation device 8 is provided between the image recording head 6 and the auxiliary recording head 7, or the two head length of the image recording head 6 and the auxiliary recording head 7 in the sub-scanning direction Y. Since it is not necessary to provide the device with a length of one minute, the size of the device and the cost of the device can be reduced, and the amount of heat generated from the ultraviolet irradiation device 8 can be reduced to obtain a good image. it can.
- the heads 6, 7 in the front printing mode and the back printing mode are used. Force to select the upstream half area or the downstream half area in the sub-scanning direction Y of the nozzle row as the ink ejection area 14 Not limited to this, for example, the upstream 1Z3 area or the downstream side You may select the 1Z3 area.
- a nozzle in a certain area on the downstream side in the sub-scanning direction ⁇ ⁇ is set as a spare nozzle for a nozzle in which ink ejection failure has occurred, and each of the other nozzles is used as a spare nozzle.
- the ink ejection area 14 may be divided so as to be selectable according to the recording mode. In this case, the entire image recording head in the normal mode refers to the entire nozzle row excluding the spare nozzle.
- the inks used are yellow ( ⁇ ), magenta ( ⁇ ), cyan (C), and black ( ⁇ ) inks for image recording, and white ink for auxiliary recording ink.
- the colors are not limited to these.
- eight colors including light yellow (LY), light magenta (LM), light cyan (LC), and light black (LK) are used as image recording inks.
- a special color such as silver may be used as the auxiliary recording ink.
- the white ink is ejected from the auxiliary recording head 7 in a solid state to record an image with a white background.
- the white ink is ejected in dots as an image.
- an image having high coloring properties may be obtained by recording an image with each color ink. In this case, it is possible to select a post-printing mode in which the auxiliary recording ink is ejected first and then the image is overlaid with the image recording ink.
- the nozzle The downstream half of the row in the sub-scanning direction ⁇ is the ink ejection area 14, and the auxiliary recording head 7 is the ink ejection area 14 of the upstream half of the nozzle row in the sub-scanning direction ⁇ . Accordingly, the image recording head 6 and the auxiliary recording head 7 are controlled to eject ink.
- a transparent ink may be ejected from the auxiliary recording head 7 to obtain an image having smoothness and glossiness.
- a pre-printing mode in which the image is first recorded with the image recording ink and then the auxiliary recording ink is overlaid.
- each image recording head is used.
- the upstream half area of the nozzle array in the sub-scanning direction Y is defined as an ink ejection area 14
- the auxiliary recording head 7 is defined as the downstream half area of the nozzle array in the sub-scanning direction Y.
- the controller 13 controls the image recording head 6 and the auxiliary recording head 7 to eject ink.
- the auxiliary recording head 7 may be configured to include a head that discharges solid white ink and a head that discharges transparent ink, or a head that discharges white ink in the form of an image and a transparent ink. It may be configured to include a head for discharging, or may be configured to be able to select whether to discharge the white ink in a solid state.
- the ink jet recording apparatus 20 according to the present embodiment is substantially the same as the first embodiment except for the arrangement of the image recording head 6 and the auxiliary recording head 7 and the control relating to the ink ejection operation. In the following, differences from the first embodiment will be particularly described.
- the ink jet recording apparatus 20 includes a carriage 3 that reciprocates in the main scanning direction X over a recording medium by a carriage driving mechanism (not shown).
- An image recording head 6 having nozzles for discharging color inks of yellow ( ⁇ ), magenta (M), cyan (C), and black (K) onto a recording medium (not shown), and recording of an image.
- an auxiliary recording head 7 formed with a nozzle for discharging a white ink (W) for solidly painting the background of an image recorded by the image recording ink with white, Two heads of the same color are arranged along the sub-scanning direction Y with two heads of the same color shifted from each other by the head width in the main scanning direction X, and the heads of each color are arranged in parallel in the main scanning direction X. Is installed.
- two ultraviolet irradiation devices 8 for each color are provided for irradiating the ink ejected to the nozzlelka recording medium with ultraviolet light.
- the upstream end of the upstream head in the sub-scanning direction Y of the head is provided over the downstream end of the downstream head.
- the inkjet recording device 20 has a control for controlling the inkjet recording device 20. It has a control unit (not shown). This control unit operates each member based on statuses such as the operation status of the carriage driving mechanism, the recording heads 6, 7, the transport mechanism (not shown), and the ultraviolet irradiation device 8 according to each processing program. Control!
- the control unit selects and selects the ink discharge areas 14 where the ink is discharged from the image recording head 6 and the auxiliary recording head 7 according to the recording mode.
- the image recording head 6, the auxiliary recording head 7, the transport mechanism 11, and the like are controlled so that an image is recorded by ejecting ink from the ink ejection area 14.
- the recording mode includes a normal mode, a front printing mode, and a back printing mode.
- the control unit controls the entire image recording head 6, that is, both image recording heads 6 arranged in the sub-scanning direction Y by two for each color. Is selected as the ink ejection area 14.
- the control unit controls the image recording head 6 so that two images of each color are arranged in the sub-scanning direction Y.
- the downstream head of the recording heads 6 is selected as the ink ejection area 14, and the auxiliary recording head 7 is the upstream head of the two auxiliary recording heads 7 arranged in the sub-scanning direction Y. Is selected as the ink ejection area 14.
- the control unit moves the image recording head 6 so that two images of each color are arranged in the sub-scanning direction Y.
- the upstream head is selected as the ink ejection area 14
- the auxiliary recording head 7 is the downstream head among the two auxiliary recording heads 7 arranged in the sub-scanning direction Y. Is selected as the ink ejection area 14.
- both nozzle arrays in which two of each color are arranged by the control unit for each image recording head 6 are connected to the ink ejection area 14. Then, a predetermined nozzle force based on image data is ejected using the entire color image recording head 6 for each color. And in each of the forward direction and the secondary direction Then, ultraviolet rays are sequentially irradiated on the ink that has landed on the recording medium by the ultraviolet irradiation device 8 located on the downstream side of the image recording head 6, and the ink is cured. As a result, an image with no background is recorded on the recording medium.
- the control unit controls the nozzle array on the downstream side in the sub-scanning direction Y of each image recording head 6 and the nozzle on the upstream side in the sub-scanning direction Y of the auxiliary recording head 7.
- the array force is the S ink ejection area 14, and for each main scan, white ink is solidly ejected from the upstream nozzle array of the two nozzle arrays of the auxiliary recording head 7 and the image recording head 6
- Each color ink based on image data is ejected from the downstream nozzle array of the two nozzle arrays.
- the ultraviolet light irradiating device 8 located on the downstream side of the head in the main scanning direction X sequentially irradiates the ink that has landed on the recording medium with ultraviolet light.
- the ink ejection area 14 of the auxiliary recording head 7 is located upstream of the ink ejection area 14 of the image recording head 6 in the sub-scanning direction Y.
- the solid-printed portion of the white ink is transported in the sub-scanning direction Y.
- ink is ejected from the image recording head 6 to record an image. As a result, an image with a white background is recorded on the recording medium.
- the control unit controls the nozzle array on the upstream side in the sub-scanning direction Y of each image recording head 6 and the nozzle on the downstream side in the sub-scanning direction Y of the auxiliary recording head 7.
- the array force is the S ink ejection area 14, and the upstream head of the two nozzle arrays of each image recording head 6 ejects each color ink based on image data for each main scan on the back surface of the recording medium.
- white ink is solidly ejected from the downstream nozzle array.
- the ultraviolet light irradiating device 8 located on the downstream side in the main scanning direction X of the head sequentially irradiates the ink that has landed on the recording medium with ultraviolet light.
- the ink ejection area 14 of the image recording head 6 is located upstream of the ink ejection area 14 of the auxiliary recording head 7 in the sub-scanning direction Y, After each color ink ejected from the image recording head 6 based on the image data is cured on the recording medium by ultraviolet rays, a portion where the image is recorded is transported in the sub-scanning direction Y, and the portion includes In the next one main scan, white ink is ejected from the auxiliary recording head 7 onto the recording medium. Thereby, an image with a white background is recorded on the recording medium.
- the two nozzle arrays of the two nozzle arrays arranged in the sub-scanning direction Y of each image recording head 6 are used.
- One and one of the two nozzle arrays arranged in the sub-scanning direction Y of the auxiliary recording head 7 are selected so as to be located upstream of the nozzle array for recording after the nozzle array for recording first.
- the ink ejected on the upstream side is irradiated with ultraviolet rays from the upstream side in the sub-scanning direction Y of the ultraviolet irradiation device 8 provided on both sides of the head unit, and the ink is hardened.
- the ultraviolet irradiation device 8 is moved in the sub-scanning direction Y. It is not necessary to provide the recording head 6 and the auxiliary recording ink with a length corresponding to the total head length.
- the auxiliary recording heads 7 are provided on both sides of the image recording head 6, and the auxiliary recording heads 7 are provided on the upstream and downstream sides in the sub-scanning direction Y of the image recording head 6. Since it is not necessary to provide the recording head 7, the size of the carriage 3 on which each head is mounted and the entire apparatus can be reduced, and the apparatus cost can be reduced. Further, since it is not necessary to increase the area of the platen 9 supporting the recording medium, it is possible to obtain a good image without lowering the conveyance accuracy.
- an ultraviolet irradiation device 8 may be provided between the image recording head 6 and the auxiliary recording head 7, or the total length of the image recording head 6 and the auxiliary recording head 7 in the sub-scanning direction Y. Since it is not necessary to provide the device with a long length, the size of the device and the cost of the device can be reduced, and the amount of generated heat can be reduced to obtain a good image. It is to be noted that the present invention is not limited to the present embodiment, as in the first embodiment.
- the ink jet recording apparatus 30 according to the present embodiment is substantially the same as the first embodiment except for the arrangement of the image recording head 6 and the auxiliary recording head 7 and the control relating to the ink ejection operation. In the following, differences from the first embodiment will be particularly described.
- the ink jet recording apparatus 30 has a carriage 3 that reciprocates in the main scanning direction X above a recording medium by a carriage driving mechanism (not shown).
- the image recording heads 6 formed with nozzles for ejecting the yellow ( ⁇ ) and magenta (M) inks are arranged along the sub-scanning direction Y while being shifted from each other in the main scanning direction X by the head width.
- the image recording heads 6, which form nozzles for ejecting cyan (C) and black (K) color inks, are similarly arranged in the sub-scanning direction Y and record images.
- Two auxiliary recording heads 7 each of which forms a nozzle for discharging a white ink (W) for solid-filling the background of an image recorded with the image recording ink with white as auxiliary recording ink, Head width to each other It is mounted so as to be arranged along the sub-scanning direction Y while being shifted in the scanning direction X.
- an ultraviolet irradiating device that irradiates ultraviolet light to the ink ejected to the nozzlelka recording medium 8 force in the sub-scanning direction Y It is provided from the upstream end of the upstream head to the downstream end of the downstream head.
- the inkjet recording device 30 has a control unit (not shown) for controlling the inkjet recording device 30.
- the control unit controls the operation of each member based on the status of the operation status of the carriage driving mechanism, the recording heads 6, 7, the transport mechanism, the ultraviolet irradiation device 8, and the like according to each processing program. Become! /
- the control unit selects and selects the ink discharge areas 14 where ink is discharged from the image recording head 6 and the auxiliary recording head 7 according to the recording mode.
- the image recording head 6, the auxiliary recording head 7, the transport mechanism 11, and the like are controlled so that the ink is ejected from the ejected ink ejection area 14 to record an image. It has become.
- the recording mode includes a normal mode, a front printing mode, and a back printing mode.
- the control unit sets the entire image recording head 6, that is, the entire nozzle row formed in each image recording head 6 as an ink ejection area 14, as shown in FIG. I started to choose.
- the control section controls the magenta (M) and the black located on the upstream side in the sub-scanning direction Y of the image recording head 6.
- the downstream half of the nozzle row in the sub-scanning direction Y is selected as the ink ejection area 14, and the yellow (Y) and the cyan (Y) located on the downstream side are selected.
- the area of the upstream half in the sub-scanning direction Y of the nozzle row is selected as the ink ejection area 14, and the auxiliary recording head 7 is The area on the upstream half of the nozzle row of the head on the Y upstream side is selected as the ink ejection area 14.
- the control unit sets the magenta (M) and black located on the upstream side in the sub-scanning direction Y of the image recording head 6.
- M magenta
- black located on the upstream side in the sub-scanning direction Y of the image recording head 6.
- the downstream half of the nozzle row in the sub-scanning direction Y is selected as the ink ejection area 14, and the yellow (Y) and the cyan (Y) located on the downstream side are selected.
- the area of the upstream half in the sub-scanning direction Y of the nozzle row is selected as the ink ejection area 14, and the auxiliary recording head 7 is The area on the downstream half of the nozzle row of the head on the Y downstream side is selected as the ink ejection area 14.
- the image recording head 6 When an image is recorded on a recording medium, if the normal mode is selected, the image recording head 6 is set as the overall ink ejection area 14 by the control unit, and is converted into image data using all the nozzles. A predetermined nozzle force based on each color ink is ejected. Then, in each of the forward direction and the sub direction, the ultraviolet light irradiating device 8 located downstream of the image recording head 6 sequentially irradiates the ink that has landed on the recording medium with ultraviolet light to cure the ink. . this As a result, an image without a background is recorded on the recording medium.
- control unit controls magenta (M) and black
- the white ink is ejected from the nozzles on the side, and the nozzles on the downstream side of the magenta (M) and black (K) image recording heads 6 and the yellow (Y) and cyan (C) image recording heads 6 are formed.
- M magenta
- K black
- Y yellow
- C cyan
- the ink ejection area 14 of the auxiliary recording head 7 is located upstream of the ink ejection area 14 of the image recording head 6 in the sub-scanning direction Y.
- the solid-printed portion of the white ink is transported in the sub-scanning direction Y.
- ink is ejected from the magenta (M) and black (K) image recording heads 6. After each of the magenta (M) and black (K) inks is cured by ultraviolet light, the image portion recorded with each of the magenta (M) and black (K) inks on the solid white ink is printed.
- control section controls the magenta (M) and black
- the downstream side of the nozzle row of the auxiliary recording head 7 on the downstream side in the sub-scanning direction Y is an ink ejection area 14, and the magenta (M) and black
- the nozzles on the downstream side of the image recording head 6 of the rack (K) and the nozzles on the upstream side of the yellow ( ⁇ ) and cyan (C) image recording heads 6 eject ink of each color based on the image data.
- white ink is ejected solidly from nozzles downstream of the downstream head. Then, in each of the forward direction and the sub direction, the ultraviolet light irradiating device 8 located on the downstream side in the main scanning direction X of the head sequentially irradiates the ink that has landed on the recording medium with ultraviolet light.
- the magenta After each color ink ejected based on the image data from the ( ⁇ ) and black ( ⁇ ) image recording heads 6 is cured on the recording medium by ultraviolet rays, the portion where this image is recorded is It is transported in the scanning direction ⁇ ⁇ ⁇ , and in the next main scan, the yellow ( ⁇ ) and cyan (C) image recording heads are applied to the image portion recorded with the magenta ( ⁇ ) and black ( ⁇ ) color inks. Ink is ejected from 6.
- the image portion recorded with each color ink is transported in the sub-scanning direction ⁇ , and the portion is subjected to the next primary scanning.
- the white ink is ejected from the auxiliary recording head 7 onto the recording medium.
- a color image with a white background is recorded on the recording medium.
- the ink of the head to be recorded after the nozzle area force for ejecting the ink of the head to be recorded first is used.
- the ink ejected on the upstream side may be selected so that it is located on the upstream side in the sub-scanning direction ⁇ ⁇ from the nozzle area to be ejected.
- the ultraviolet irradiation device 8 provided on both sides of the head unit in the sub-scanning direction ⁇ ⁇ ⁇ Since the ink is cured by irradiating ultraviolet rays from the upstream side of the recording head, auxiliary recording heads 7 are provided on both sides of the image recording head 6 and also between the image recording head 6 and the auxiliary recording head 7. There is no need to provide an ultraviolet irradiation device 8.
- the ultraviolet irradiation device 8 is moved in the sub scanning direction ⁇ . Length for total head length of image recording head 6 and auxiliary recording ink It is not necessary to provide it.
- the auxiliary recording heads 7 are provided on both sides of the image recording head 6, and the auxiliary recording heads 6 are provided on the upstream and downstream sides in the sub-scanning direction Y of the image recording head 6. Since it is not necessary to provide the recording head 7, the size of the carriage 3 on which each head is mounted and the entire apparatus can be reduced, and the apparatus cost can be reduced. Further, since it is not necessary to increase the area of the platen 9 supporting the recording medium, it is possible to obtain a good image without lowering the conveyance accuracy.
- an ultraviolet irradiation device 8 may be provided between the image recording head 6 and the auxiliary recording head 7 or may be provided in the sub-scanning direction Y by the total head length of the image recording head 6 and the auxiliary recording ink. Since it is not necessary to provide the apparatus with a long length, the size of the apparatus can be reduced and the apparatus cost can be reduced, and the amount of heat generation can be reduced to obtain a good image.
- the present invention is not limited to the present embodiment, as in the first embodiment.
- the image recording head 6 in both the front printing mode and the back printing mode has the sub-scanning direction in the nozzle rows of the magenta (M) and black (K) image recording heads 6. Force printing so that the downstream area in Y and the upstream area in the sub-scanning direction Y in the nozzle row of the yellow (Y) and cyan (C) image recording heads 6 are selected as the ink ejection areas 14.
- both the full-color image recording heads 6 may select a half area on the downstream side of the nozzle row in the sub-scanning direction Y as the ink ejection area 14.
- the area on the upstream half of the nozzle row in the sub-scanning direction Y is selected as the ink ejection area 14 for each color all image recording head 6.
- the background color ink is mainly solidly ejected to record the background of the image.
- the present invention is not limited to this.
- Various types of backgrounds can be recorded, such as a background accompanied by a.
- the present invention includes the following configurations.
- the ink jet recording apparatus reciprocates the image recording ink for mainly recording an image in the main scanning direction, and conveys the recording medium in the sub scanning direction orthogonal to the main scanning direction.
- An image recording head formed with nozzles for discharging by An auxiliary recording head, which is disposed in parallel with the recording head in the main scanning direction and forms a nozzle for discharging an auxiliary recording ink for assisting image recording while reciprocating in the main scanning direction;
- an ink ejection area where ink is ejected from the image recording head and the auxiliary recording head is selected in the sub-scanning direction, and ink is ejected from the selected ink ejection area.
- a controller for controlling the image recording head and the auxiliary recording head.
- an ink ejection area in which ink is ejected from the image recording head and the auxiliary recording head is selected in the sub-scanning direction according to the recording mode.
- Force When superimposing ink for image recording, select the upstream side in the sub-scanning direction as the ink ejection area for the auxiliary recording head, and select the downstream side as the ink ejection area for the image recording head.
- auxiliary recording heads may be provided on both sides of the image recording head, or the upstream side of the image recording head in the sub-scanning direction. Necessary to provide an auxiliary recording head I,.
- the recording mode is a normal mode in which an image is recorded using only the image recording ink, and an image is recorded by the image recording ink first.
- the control unit controls the image recording head so that the entire image recording head is ejected as the ink ejection area, and in the pre-print mode, The ink ejection area of the image recording head is located upstream of the ink ejection area of the auxiliary recording head in the sub-scanning direction.
- the ink ejection area in the image recording head is the ink in the auxiliary recording head.
- the image recording is performed so as to be located downstream from the discharge area in the sub-scanning direction.
- the auxiliary recording head is controlled to eject ink.
- a predetermined amount of ink is ejected from the entire image recording head based on image data, and an image without a background is recorded on a recording medium.
- the ink ejection area of the image recording head is located upstream in the sub-scanning direction from the ink ejection area of the auxiliary recording head. After the ink is ejected and the image is recorded, the portion on which the image is recorded is conveyed in the sub-scanning direction, and the ink is ejected from the auxiliary recording head in the next one main scan. In addition, the auxiliary recording ink is superimposed on the image recorded by the image recording ink.
- the ink ejection area of the auxiliary recording head is located upstream of the ink ejection area of the image recording head in the sub-scanning direction.
- the portion where the auxiliary recording ink is recorded is conveyed in the sub-scanning direction, and the image is recorded by discharging the ink from the image recording head in the next main scan. Thereby, an image is recorded by the image recording ink on the auxiliary recording ink.
- the auxiliary recording ink is a background ink used for recording a background of an image
- the pre-print mode is configured such that the image is printed on a back surface of the recording medium.
- This is a back-printing mode in which an image is recorded with recording ink and the background ink is ejected from above
- the post-printing mode is where the background ink is ejected onto the surface of the recording medium, and the image is ejected from above.
- the ink ejection area of the image recording head is located upstream of the ink ejection area of the auxiliary recording head in the sub-scanning direction.
- the portion on which the image is recorded is conveyed in the sub-scanning direction, and the next main scanning is performed on the portion.
- an image is recorded with the image recording ink using the background ink as a background.
- the ink ejection area force of the auxiliary recording head Is located upstream in the sub-scanning direction with respect to the ink ejection area, the portion where the auxiliary recording ink is ejected after the background ink is ejected from the auxiliary recording head in one main scan is In the sub-scanning direction, ink is ejected from the image recording head in the next main scan in the sub-scanning direction, and the image is recorded, so that the image is recorded with the ejected background ink as the background using the image recording ink. Is recorded.
- the background ink is a white ink.
- the ink ejection area is an upstream side in a sub scanning direction of a nozzle row in which the nozzles are arranged in the sub scanning direction. Area, downstream area and the whole! / ⁇ .
- images corresponding to various recording modes can be recorded by one image recording head and one auxiliary recording head.
- a plurality of the image recording nozzle arrays for discharging the same type of ink and a plurality of the nozzles for discharging the same type of ink are provided.
- the auxiliary recording nozzle array is disposed along the sub-scanning direction, and the ink ejection area is an upstream side, a downstream side, and a sub-scanning direction of the plurality of recording nozzle arrays that eject the same type of ink. This is the deviation of the entire recording nozzle array.
- the ink is a photocurable ink that is cured by irradiating light
- the image recording head and the ink A light irradiation device for irradiating the ink discharged from the auxiliary recording head and landing on the recording medium with light to cure the ink is a head including the image recording head and the auxiliary recording head. It is located on both sides of the unit.
- the ink is an ultraviolet curable ink that is cured by irradiating ultraviolet light
- the light irradiating apparatus includes an ultraviolet light. Is an ultraviolet irradiation device that emits light.
- the ultraviolet irradiation device is provided between the image recording head and the auxiliary recording head, or the total irradiation of the image recording head and the auxiliary recording ink in the sub-scanning direction. It is not necessary to provide it with the length of the length!
- the auxiliary recording for both sides of the image recording head is performed. It is not necessary to provide a head or an auxiliary recording head upstream of the image recording head in the sub-scanning direction.Therefore, it is possible to reduce the size of the carriage on which each head is mounted and the entire apparatus, thereby reducing the apparatus cost. Can be reduced. In addition, since there is no need to increase the area of the platen that supports the recording medium, it is possible to obtain a good image Can be obtained.
- the above-described (6) can be used.
- the size of the device and the cost of the device can be reduced, and a good image can be obtained.
- auxiliary recording heads are provided on both sides of the image recording head, or at least one of the upstream and downstream sides of the image recording head in the sub-scanning direction is displaced. Since it is not necessary to provide an auxiliary recording head, it is possible to reduce the size of the carriage on which each head is mounted and the entire apparatus, thereby reducing the apparatus cost. Further, since it is not necessary to increase the area of the platen supporting the recording medium, it is possible to obtain a good image without lowering the conveyance accuracy.
- the light irradiation device may be provided between the image recording head and the auxiliary recording head, or may be provided in the sub-scanning direction with a length corresponding to the total head length of the image recording head and the auxiliary recording ink. Since there is no need to perform the above, it is possible to reduce the size of the apparatus and reduce the cost of the apparatus, and it is possible to obtain a good image with reduced heat generation.
- the ultraviolet irradiation device is provided between the image recording head and the auxiliary recording head, or the ultraviolet irradiation device is provided in the sub-scanning direction by the total head length of the image recording head and the auxiliary recording ink. It is not necessary to provide the device with a length of In addition, the amount of heat generated can be reduced, and a good image can be obtained. Industrial applicability
- the ink jet recording apparatus it is not necessary to provide auxiliary recording heads on both sides of the image recording head, or to provide auxiliary recording heads upstream of the image recording head in the sub-scanning direction. Therefore, it is possible to reduce the size of the carriage on which each head is mounted and the entire apparatus, and reduce the apparatus cost. Further, since it is not necessary to increase the area of the platen supporting the recording medium, it is possible to obtain a good image without lowering the conveyance accuracy.
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Abstract
Description
Claims
Priority Applications (2)
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JP2006512745A JP4770734B2 (ja) | 2004-04-27 | 2005-04-19 | インクジェット記録装置 |
EP05734653.8A EP1741555B2 (en) | 2004-04-27 | 2005-04-19 | Ink jet recorder |
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JP2004131416 | 2004-04-27 | ||
JP2004-131416 | 2004-04-27 |
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WO2005105452A1 true WO2005105452A1 (ja) | 2005-11-10 |
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PCT/JP2005/007419 WO2005105452A1 (ja) | 2004-04-27 | 2005-04-19 | インクジェット記録装置 |
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US (1) | US7407277B2 (ja) |
EP (1) | EP1741555B2 (ja) |
JP (1) | JP4770734B2 (ja) |
WO (1) | WO2005105452A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP1741555B1 (en) | 2011-10-19 |
US7407277B2 (en) | 2008-08-05 |
US20050237352A1 (en) | 2005-10-27 |
EP1741555A4 (en) | 2010-04-21 |
EP1741555B2 (en) | 2015-07-29 |
JPWO2005105452A1 (ja) | 2008-03-13 |
JP4770734B2 (ja) | 2011-09-14 |
EP1741555A1 (en) | 2007-01-10 |
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