WO2014045959A1 - Dispositif de rayonnement ultraviolet et dispositif de commande de durcissement d'encre - Google Patents

Dispositif de rayonnement ultraviolet et dispositif de commande de durcissement d'encre Download PDF

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Publication number
WO2014045959A1
WO2014045959A1 PCT/JP2013/074491 JP2013074491W WO2014045959A1 WO 2014045959 A1 WO2014045959 A1 WO 2014045959A1 JP 2013074491 W JP2013074491 W JP 2013074491W WO 2014045959 A1 WO2014045959 A1 WO 2014045959A1
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WO
WIPO (PCT)
Prior art keywords
illuminance
ultraviolet
segment
ink jet
jet printer
Prior art date
Application number
PCT/JP2013/074491
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English (en)
Japanese (ja)
Inventor
津久井克幸
Original Assignee
武藤工業株式会社
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Publication date
Application filed by 武藤工業株式会社 filed Critical 武藤工業株式会社
Publication of WO2014045959A1 publication Critical patent/WO2014045959A1/fr

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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

Definitions

  • the present invention relates to an ultraviolet irradiation device and an ink curing control device used for a liquid ejection device that ejects a liquid that is cured by ultraviolet rays, such as an ink jet printer using ultraviolet curable ink (UV ink).
  • a liquid ejection device that ejects a liquid that is cured by ultraviolet rays
  • UV ink ultraviolet curable ink
  • An ink jet printer that prints on a medium such as paper using ultraviolet curable ink (UV ink) and irradiates the ink after printing with ultraviolet rays to cure the ink is known (for example, Patent Document 1). reference).
  • a multi-pass ink jet printer that completes printing of a print area having a predetermined bandwidth by scanning a plurality of times with an ink jet recording head is conventionally known (see, for example, Patent Document 2).
  • a UV LED light source for an ink jet printer is controlled so as to be irradiated evenly with the length direction as one unit.
  • the inkjet printer printing method there is a method in which the head is divided into multiple areas within the print width that can be printed, and the image is completed by printing multiple times by printing and transporting paper according to the print width. is there.
  • the print width of the inkjet head is divided into a plurality of areas, and printing is performed while overlapping the required number of times for each area.
  • printing is performed with a general UV LED light source.
  • the irradiation range is larger than the width, and only the control can be performed so that the amount of light is constant as a whole.
  • the printing state of each area is different, so naturally that part The amount of light of the LED light source for UV that is required is different, and partial control corresponding to it is also required.
  • the UV ink has a protruding or flat shape depending on the timing when the UV light is irradiated after arrival at the medium.
  • the first printed portion should have a certain degree of flatness. Adhesion is good, and it is better to irradiate UV light when a little time has passed.
  • UV ink has the property that when the ink is applied on top of it when it is cured, the adhesion between the inks becomes stronger. Therefore, it is necessary to gradually increase the amount of light and cure it without applying it at once. .
  • the present invention aims to solve the above problems.
  • the present invention provides an ultraviolet irradiation device for use in a liquid ejection device that ejects a liquid that is cured by ultraviolet rays, an ultraviolet lamp comprising an ultraviolet light emitting diode, and electronically controlling the ultraviolet lamp. And a controller that divides the ultraviolet irradiation section of the ultraviolet lamp into a plurality of segments, and the illuminance of each segment can be controlled by the controller.
  • the present invention is also an ultraviolet irradiation device used in an ink jet printer using an ultraviolet curable ink, comprising: an ultraviolet lamp comprising an ultraviolet light emitting diode; and a controller for electronically controlling the ultraviolet lamp.
  • the ultraviolet irradiation part of the lamp is divided into a plurality of segments, and the illuminance of each segment can be controlled by the controller.
  • the present invention is also an ultraviolet irradiation device used in an ink jet printer using an ultraviolet curable ink, comprising: an ultraviolet lamp comprising an ultraviolet light emitting diode; and a controller for electronically controlling the ultraviolet lamp.
  • the lamp is provided with an illuminance changing portion having a region extending rearward from the tip portion thereof, the illuminance changing portion is divided into a plurality of segments, and the illuminance of each segment can be controlled by the controller.
  • the present invention is characterized in that the ultraviolet lamp is provided with a maximum illuminance setting part that extends further rearward from the rear end of the illuminance change part adjacent to the illuminance change part.
  • the illuminance changing section and the maximum illuminance setting section of the ultraviolet lamp are composed of a plurality of ultraviolet light emitting diode chips.
  • each segment of the illuminance changing unit is constituted by an LED body in which a plurality of ultraviolet light emitting diode chips are arranged in one or a plurality of rows.
  • a plurality of the segments forming the illuminance changing part are arranged in parallel from the head of the illuminance changing part to the rear, and the arrangement width between the head segment and the last segment is an ink jet printing apparatus. It is characterized by being equivalent to the print width. Further, the invention is characterized in that each segment of the illuminance changing portion corresponds to a relative transport width in the sub-scanning direction of the medium with respect to a head portion of a multi-pass ink jet printer.
  • the illuminance of the first line segment of the illuminance change unit is set to zero or close to the illuminance, and the other line segments are set to have higher illuminance than the first line segment.
  • the illuminance of the segment in the first row of the illuminance changing unit is set to zero or a low illuminance close to this, and the illuminance of the other row segments is set to increase stepwise toward the maximum illuminance. It is characterized by being.
  • the illuminance of the first row segment of the illuminance changing unit is set to zero or a low illuminance close thereto, and the illuminance of the other row segments is set higher than the illuminance of the first row segment, The high illuminance of the segment in the other row is set to a constant illuminance.
  • the illuminance of the first row segment of the illuminance changing unit is set to zero or a low illuminance close thereto, and the illuminance of the other row segments is set higher than the illuminance of the first row segment, The high illuminance of the segment in the other row is set so as to gradually decrease toward the rear segment.
  • the present invention divides the nozzle row of the inkjet head unit into a plurality of regions corresponding to the conveyance width of the medium in the sub-scanning direction, and increases the print width by one conveyance for each scanning of the head unit to cure the ultraviolet rays.
  • the ink is sequentially printed, and the printed ink is cured by irradiating the ultraviolet light from the ultraviolet lamp of the ultraviolet irradiation device interlocked with the ink jet head unit, and the printed area is printed by a plurality of scans.
  • An ink curing control device used for a completed inkjet printer wherein the ultraviolet lamp is composed of a plurality of ultraviolet light emitting diodes, and the illuminance of the ultraviolet light emitting diode can be controlled by a controller, and the ultraviolet irradiation part of the ultraviolet lamp is illuminance 1st time printed in the first scan among multiple scans
  • the invention is characterized in that the illuminance of ultraviolet rays applied to the print area printed in the second and subsequent scans is increased step by step sequentially for each scan.
  • the illuminance of ultraviolet rays applied to the print area printed in the second and subsequent scans is set to an illuminance higher than the illuminance in the first scan, and the illuminance is kept constant for each scan. It is characterized by being set.
  • the illuminance of ultraviolet rays applied to the print area printed in the second and subsequent scans is set to an illuminance higher than that in the first scan, and the illuminance decreases with each scan. It is characterized by being set.
  • the present invention provides a maximum illuminance setting section in the direction of extension of the array of the ultraviolet irradiation section adjacent to the ultraviolet irradiation section of the ultraviolet lamp divided into a plurality of segments, and printing that has been printed a predetermined number of times.
  • the portion is irradiated with ultraviolet rays from the maximum illuminance setting unit.
  • the ink is cured weakly at first, and the ink placed thereon is gradually added.
  • the adhesion between the ink and the upper and lower sides of the ink becomes stronger, and the adhesion of the ink to the medium can be improved.
  • the portion that performs step control in accordance with the printing width of the ink jet printer and the portion of the maximum illuminance that is completely cured can be controlled in individual units, it can be handled by one unit.
  • reference numeral 2 denotes a Y rail of the ink jet printer, which is fixed to the machine body 4 via a support.
  • Reference numeral 6 denotes an ink jet recording head, which is attached to the head portion 8.
  • the head portion 8 is connected to the Y rail 2 so as to reciprocate along this, that is, in the main scanning direction (Y-axis direction).
  • the recording head 6 is provided with ink discharge nozzle rows 10, 12, 14, and 16.
  • the nozzle arrays 10, 12, 14, and 16 are arranged in parallel at the bottom of the recording head 6 so that the print areas in the main scanning direction overlap each other, and as a result, the recording head 6 has a predetermined number as shown in FIG.
  • the printing width (H) is formed.
  • Various types of nozzles of the recording head 6 can be used, and various types are used depending on the specifications of the recording head, such as a configuration composed of a plurality of rows and a configuration in which the nozzles are arranged obliquely.
  • the length of the nozzle row that defines the print width H of the inkjet recording head 6 is divided into a plurality of regions corresponding to the transport width of the paper (medium) 18 in the sub-scanning direction. As shown in FIG. 6A, the width corresponding to the transport width of the paper 18 in the sub-scanning direction is set.
  • the main controller 20 of the printer uses the divided area a as a unit as a reference for driving the recording head 6. In this embodiment, the controller 20 is configured to drive the recording head 6 between a minimum of 1 unit and a maximum of 8 units.
  • a plurality of ultraviolet curable ink sub-tanks are attached to the head unit 8, and ink is supplied to the sub-tanks from an ink cartridge disposed on the machine body side by a tube.
  • the sub tanks and the corresponding nozzle rows 10, 12, 14, 16 of the recording head 6 are connected via tubes.
  • an ultraviolet (UV) irradiation device 22 is connected to one side of the head portion 8 via a support.
  • a platen 19 is provided below the Y rail 2, and a sheet 18 is disposed on the platen 19.
  • a slit is formed in the platen 19 along the Y rail 2, and a driving roller is disposed in the slit.
  • the paper 18 on the platen 19 is sandwiched between the driving roller and a pressing roller 24 provided on the Y rail 2 side, and is conveyed on the platen 19 at a predetermined pitch width in the sub-scanning direction by the rotation of the driving roller. It is comprised so that.
  • An ultraviolet (UV) lamp 26 is housed inside the box-shaped cover of the ultraviolet irradiation device 22, and an ultraviolet irradiation window 28 is formed at the bottom of the cover, as shown in FIG.
  • an illuminance changing unit 32 and a maximum illuminance setting unit 34 are formed in a rectangular region extending in the sub-scanning direction.
  • the illuminance changing unit 32 includes an LED body 36 in which a plurality of LED (light emitting diode) chips 30 are arranged in a line in the main scanning direction, and the LED body 36 includes a plurality of rows (eight rows). As shown, they are arranged in the sub-scanning direction.
  • the maximum illuminance setting unit 34 includes an LED module in which a plurality of LED chips 30 are arranged in m rows and n columns.
  • the maximum illuminance setting unit 34 may be in an individual control form like the illuminance changing unit 32, but it is not necessary to perform fine control, and is described in block units in the present embodiment.
  • the length b of the illuminance changing unit 32 in the sub-scanning direction is set to be substantially the same as the length of the print width H of the recording head 6.
  • the illuminance changing unit 32 is divided into a plurality of segments 1, 2, 3, 4, 5, 6, 7, and 8 that form one section for each LED body 36.
  • Unique illuminance is set.
  • the width c (see FIG. 6A) of each of the segments 1 to 8 formed for each LED body 36 in the sub-scanning direction is divided for controlling the width of the paper (medium) in the multi-pass printer, that is, the recording head 6.
  • the band region a (see FIG. 6A) is set to be substantially the same.
  • the length of the UV lamp 26 in the sub-scanning direction of the maximum illuminance setting unit 34 is set to be approximately 1.5 times the length of the illuminance changing unit 32 in the sub-scanning direction. Are formed so as to protrude in the paper transport direction.
  • the lengths of the illuminance changing unit 32 and the maximum illuminance setting unit 34 may be changed in accordance with the amount of light necessary for the product.
  • the UV lamp 26 is a UV lamp drive control composed of a UV lamp controller and a driver so that the light quantities of the segments 1 to 8 of the illuminance changing unit 32 and the LED module of the maximum illuminance setting unit 34 can be controlled individually.
  • the light amount of the UV lamp 26 is controlled between the main controller 20 and the UV lamp drive control unit.
  • an address number given in advance is used.
  • the UV lamp drive control unit 38 drives each LED body of the UV lamp 26 by a PWM method or the like via a driver based on given data.
  • the illuminance changing unit 32 of the UV lamp 26 shown in FIG. 1 the illuminance level is changed from zero to the set maximum illuminance, and the illuminance change amount for each step is the same, and the illuminance is changed in eight steps.
  • the eight-stage illuminance change corresponds to the 8-pass printing method of the printer.
  • the nozzle array of the recording head is divided into 8 parts, and the printing of the area for one band printed first in the 8 scannings is completed by the 8 scannings of the recording head. It is a method.
  • the UV lamp 26 is disposed in close proximity to the irradiation window 28 extending in the sub-scanning direction of the case so that the irradiation surface of the bottom surface portion thereof is horizontal to the printing surface.
  • FIG. 1 shows the UV irradiation surface on the bottom surface of the UV lamp 26.
  • FIG. 6A shows the printing operation of the first pass of the printer.
  • the recording head 6 moves from the home position set on the left side with respect to the paper 18 to the standby position on the left side of the paper 18, and from the standby position to the nozzle row 10 in the right direction (main scanning direction). It moves while ejecting YMCK (yellow, magenta, cyan, black) UV curable ink from the divided areas a, 14, 14 and 16, respectively, and prints one band on the paper 18.
  • FIG. 6A shows a state where the sheet 18 is moved in the right direction (main scanning direction) from the left standby position.
  • FIG. 6A shows a print area B1 for one band formed when the recording head 6 moves to the right.
  • the ink printed in the print area B1 for the first band on the paper 18 by the printing operation of the first pass of the recording head 6 includes the first NO set to zero illuminance in the segment of the illuminance changing unit 32. . Since one segment is located, ultraviolet rays are not irradiated.
  • the recording head 6 returns to the left standby position in FIG. 6A and the paper 18 moves downward (in the sub-scanning direction) indicated by an arrow for one band.
  • FIG. 6A shows a print area B1 for one band formed when the recording head 6 moves to the right.
  • the ink printed in the print area B1 for the first band on the paper 18 by the printing operation of the first pass of the recording head 6 includes the first NO set to zero illuminance in the segment of the illuminance changing unit 32. . Since one segment is located, ultraviolet rays are not irradiated.
  • the recording head 6 moves to the right from the standby position, and uses the two divided areas (a ⁇ 2) of the nozzle rows 10, 12, 14, and 16 on the paper 18. Printing is performed on the printing area B1 for one band printed earlier and the area B2 for one new band.
  • the second-pass printing is overlaid on the first printing area B1 for one band.
  • UV light with the next lowest illuminance after zero degrees is NO. 2 is irradiated from the segment No. 2, and a new first band region B2 includes NO.
  • One segment passes and is not irradiated with ultraviolet rays. In this way, printing is sequentially performed on the paper 18, and the illuminance of ultraviolet rays applied to the print region B1 for the first band increases stepwise as shown in FIG. To do.
  • FIG. 6C shows a state where printing in the eighth pass is completed, and the highest illuminance ultraviolet light is NO.
  • the NO. One segment passes.
  • the other band region B7 has NO. 2 is irradiated with the ultraviolet rays in the segment 2, and the band region B6 below it is irradiated with NO.
  • the three segments of ultraviolet light are irradiated. In this way, the amount of ultraviolet light is irradiated to each print region in a stepwise manner with zero as the base point for each scan.
  • the band region B1 that has been printed is irradiated with ultraviolet light having high illuminance from the maximum illuminance setting unit 34, and the band region B2 that has been printed in the next pass
  • the high-illuminance ultraviolet rays of the maximum illuminance setting unit 34 are irradiated to the band area where printing has been completed.
  • the control of the illuminance of the UV lamp is applied to an 8-pass printing printer, but the invention is not particularly limited to an 8-pass printing printer. According to the number of passes of the printer, the nozzle array of the recording head is divided and used in the sub-scanning direction, and the illuminance change step number of the illuminance changing unit 32 of the UV lamp 26 is changed accordingly.
  • the illuminance level of one segment is associated with one row of LED bodies, but the configuration of the segments is not particularly limited to one row of LED bodies.
  • the ultraviolet irradiating device has been described as being provided on one side of the head portion, but naturally the ultraviolet irradiating device may be on both sides of the head portion. In that case, the control is the same as in the present embodiment if only the LED of the ultraviolet irradiation device at the rear in the scanning direction is turned on in reciprocal printing.
  • the recording head mounted on the head unit is not limited to a configuration having a plurality of nozzle rows, and may be one row. A plurality of recording heads may be mounted on the head unit.
  • the illuminance of one segment is not limited to zero, and may be set to a low illuminance close to zero according to the characteristics of the UV ink used.
  • each segment of the illuminance changing unit 32 is changed stepwise from zero (or low illuminance) to a predetermined illuminance level. After that, high-illuminance light may be irradiated for complete curing of the ink.
  • FIG. In the embodiment, the illuminance of the LED body 36 corresponding to one segment is set to zero, and the illuminance e of the segments 2 to 8 is set to approximately 1 ⁇ 2 of the set illuminance f of the maximum illuminance setting unit 34.
  • FIG. 9 shows an embodiment in which the illuminance g between the segments 2 and 8 is gradually reduced, contrary to the first embodiment.
  • the UV ink When drawing is performed on a sheet (medium) into which the ink does not penetrate with the UV ink, the UV ink is gradually stacked and approaches the light source. If the distance between the UV ink and the light source is limited, the irradiation energy for the UV ink increases. In order to avoid this and keep the irradiation energy constant, the illuminance between the segments (1) to (8) is changed in the decreasing direction.
  • FIG. 10 shows another embodiment of the ultraviolet lamp 40.
  • the 32 LED bodies 44 composed of the LED chips 42 are NO. 1 to NO. No. 32 is assigned, and NO. 1 to NO. 32 segments are formed.
  • segment is the NO.
  • the ultraviolet lamp 26 in FIG. 1 to NO. 8 corresponds to the segment No. 8 in FIG. 16-NO.
  • the 32 segments correspond to the maximum illuminance setting unit 34 of the ultraviolet lamp 26 in FIG.
  • Each segment of the ultraviolet lamp 40 is connected to a lamp controller 48 via a driver circuit 50, and the lamp controller 48 is connected to a printer controller 46.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention se rapporte à un dispositif de rayonnement ultraviolet qui est utilisé avec un dispositif de pulvérisation de liquide qui pulvérise un liquide qui est durci par les rayons ultraviolets, et qui est destiné à réaliser une amélioration de la qualité d'image et une amélioration de la résistance à l'abrasion et au grattage de l'image imprimée. Une lampe à ultraviolets comprenant une diode à émission d'ultraviolets est disposée dans un boîtier de sorte que la lampe à ultraviolets soit tournée vers une fenêtre de rayonnement ultraviolet du boîtier, le boîtier pouvant être fixé à une tête d'enregistrement du dispositif de pulvérisation de liquide qui pulvérise un liquide qui est durci par les rayons ultraviolets, ou à un côté d'un élément du dispositif de pulvérisation de liquide qui se déplace avec la tête d'enregistrement. La lampe à ultraviolets est pourvue d'une partie de changement d'éclairement possédant une région qui s'étend depuis la pointe de celle-ci vers l'arrière. La partie de changement d'éclairement est divisée en une pluralité de segments ayant des éclairements différents, et chaque segment peut être commandé par un dispositif de commande.
PCT/JP2013/074491 2012-09-20 2013-09-11 Dispositif de rayonnement ultraviolet et dispositif de commande de durcissement d'encre WO2014045959A1 (fr)

Applications Claiming Priority (2)

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JP2012-206622 2012-09-20
JP2012206622A JP5730255B2 (ja) 2012-09-20 2012-09-20 紫外線照射装置及びインク硬化制御装置

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WO2014045959A1 true WO2014045959A1 (fr) 2014-03-27

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Publication number Priority date Publication date Assignee Title
JP2016064378A (ja) * 2014-09-25 2016-04-28 東芝ライテック株式会社 光照射装置及び光照射方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010083059A (ja) * 2008-10-01 2010-04-15 Mimaki Engineering Co Ltd インクジェットプリンタおよびそれを用いた印刷方法
JP2010173308A (ja) * 2009-02-02 2010-08-12 Seiko Epson Corp 液体吐出装置
JP2012106384A (ja) * 2010-11-16 2012-06-07 Fujifilm Corp 画像形成装置及び画像形成方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010083059A (ja) * 2008-10-01 2010-04-15 Mimaki Engineering Co Ltd インクジェットプリンタおよびそれを用いた印刷方法
JP2010173308A (ja) * 2009-02-02 2010-08-12 Seiko Epson Corp 液体吐出装置
JP2012106384A (ja) * 2010-11-16 2012-06-07 Fujifilm Corp 画像形成装置及び画像形成方法

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