WO2012014518A1 - Dispositif de rayonnement d'ultraviolets - Google Patents

Dispositif de rayonnement d'ultraviolets Download PDF

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Publication number
WO2012014518A1
WO2012014518A1 PCT/JP2011/055816 JP2011055816W WO2012014518A1 WO 2012014518 A1 WO2012014518 A1 WO 2012014518A1 JP 2011055816 W JP2011055816 W JP 2011055816W WO 2012014518 A1 WO2012014518 A1 WO 2012014518A1
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Prior art keywords
ultraviolet
light source
reflecting
irradiation device
source unit
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PCT/JP2011/055816
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English (en)
Japanese (ja)
Inventor
卓次 山口
与弘 玉置
旭 門野
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Ｎｋワークス株式会社
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Priority to JP2012526342A priority Critical patent/JPWO2012014518A1/ja
Publication of WO2012014518A1 publication Critical patent/WO2012014518A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers

Definitions

  • the present invention relates to an ultraviolet irradiation device for irradiating ultraviolet rays to ink of a printing material.
  • the ink applied to the printing paper must be dried in a very short time.
  • Many printers have been proposed for curing ink by irradiating ultraviolet rays for such drying.
  • the printing machine described in Patent Document 1 uses an ultraviolet irradiation device using ultraviolet LEDs.
  • the ultraviolet rays emitted from the ultraviolet LED as described above are diffused light, the illuminance received by the printing paper is high immediately below the LED, but the illuminance received by the printing paper becomes relatively low as the distance from the LED increases. To go. For this reason, at the position away from the LED, the irradiated ultraviolet rays do not contribute to the curing of the ink and may be wasted.
  • the present invention has been made in order to solve the above-described problem, and can efficiently irradiate a printed material with ultraviolet rays emitted from an ultraviolet light source such as an LED to effectively cure the ink.
  • An object of the present invention is to provide an ultraviolet irradiation device that can be used.
  • the present invention is an ultraviolet irradiation device for irradiating the ink of a printing material with ultraviolet rays, and includes at least one light source unit having a plurality of ultraviolet light sources arranged along a printing width direction orthogonal to the conveyance direction of the printing material, A pair of reflecting members arranged between the light source unit and the substrate and sandwiching each light source unit from the upstream side and the downstream side in the transport direction, And a first reflecting portion extending from the ultraviolet light source toward the printed material, wherein all or at least a part of the first reflecting portion has a predetermined incident angle from the ultraviolet light source to the printed material.
  • the weak ultraviolet rays which are equal to or larger than the reference angle and hardly contribute to the curing inside the ink are reflected so that the incident angle becomes smaller than the reference angle.
  • This configuration has the following effects. As described above, the farther away from the light source, the larger the incident angle of the ultraviolet rays that are irradiated to the printed material, and when the predetermined reference angle is exceeded, the amount of reflection increases and the printed material affects the curing inside the ink. The amount of irradiation is weak. As a result, the ink may be difficult to cure.
  • the reflection member which has the 1st reflection part extended toward a to-be-printed material from the ultraviolet light source is provided.
  • this 1st reflection part makes the incident angle smaller than a reference angle, the incident angle from the ultraviolet light source to a to-be-printed object becomes more than a reference angle, and the light quantity which affects the hardening inside an ink becomes weak. It is configured to reflect. Thereby, it can prevent that the weak ultraviolet-ray which does not contribute to hardening of an ink is irradiated to a printing material, and can improve the illumination intensity of the ultraviolet-ray on a printing material. Thereby, the ink can be effectively cured.
  • the “reference angle” is a value resulting from the type of ink, etc., but as a result of the inventors' investigation, when it is incident on the ink from the air, it is in the range of 30 to 60 degrees, In the case of general ink, it is often in the range of 40 to 50 degrees. And when an ultraviolet-ray is irradiated to ink with an incident angle smaller than such an angle, ink can be hardened effectively.
  • Each of the reflecting members can be formed of a plate material, and can be folded to the opposing reflecting member side by at least one crease. Since the reflecting member is formed by bending the plate material in this way, it can be condensed. And when bending a board
  • the pair of first reflecting portions facing each other with the light source unit interposed therebetween is disposed so as to form a part of an approximate ellipse in a cross section in a state where the light source unit is disposed in the vicinity of the focal point on one end side of the long axis.
  • Can do In general, it is known that when a reflector is formed in an elliptical shape and a light source is arranged in the vicinity of the focal point on one end side of the major axis of the ellipse, the light is condensed on the focal point on the other end side of the major axis.
  • the light source when the light source is not a point light source but an ultraviolet light source having a certain size, the light source has a certain width in the vicinity of the focal point, rather than focusing on one point of the focal point.
  • Ultraviolet rays that approximate the parallel light are irradiated.
  • the plate material is bent to form an approximate ellipse by the first reflecting portion, the reflected ultraviolet rays do not behave as described above, and the ultraviolet rays are dispersed in the transport direction while maintaining the incident angle. be able to. That is, since the ultraviolet rays irradiated to the printing material are more generally dispersed than the parallel light, the cumulative amount of ultraviolet rays received by the printing material can be increased.
  • the reflecting member can be formed by bending the plate material, the manufacturing becomes easy.
  • the “near focus” mentioned above means the focus or its vicinity.
  • the range of “near” is as follows. First, it is known that if the light source unit is at the focal point, the light is condensed at another focal point, and the condensing range becomes larger as the light source unit moves away from the focal point. Accordingly, “near” means a range from a required irradiation range to the printing material to a position where the light collection range becomes large.
  • each light source unit can be provided with a plurality of ultraviolet light sources arranged in two rows along the transport direction.
  • the light source unit can be arranged as follows. That is, one of the first reflecting portions facing each other with the light source unit interposed therebetween approximately forms a part of an ellipse in a cross section, and the ultraviolet light disposed near one of the first reflecting portions of the light source unit.
  • a light source can be placed in the vicinity of one focal point in the ellipse in the cross section.
  • the position of the first reflecting portion can be set so that the ultraviolet light emitted from the ultraviolet light source also reflects the ultraviolet light whose incident angle to the printing material is smaller than the reference angle. If it does in this way, the ultraviolet illumination intensity which a to-be-printed material receives in the downward vicinity of an ultraviolet light source can be improved.
  • the first reflecting portion may be extended toward the printing material.
  • each reflection member is formed of a plate material, and each reflection member can be bent by a fold extending in the conveyance direction of the substrate to form the first reflection portion and the second reflection portion.
  • a plurality of light source units can be arranged along the transport direction at a predetermined interval.
  • the illuminance of ultraviolet rays irradiated on the printing material can be greatly improved.
  • the illuminance of the ultraviolet rays can be further improved.
  • the light source unit is provided with a plurality of ultraviolet light sources arranged in two rows along the transport direction, and an intermediate for reflecting the ultraviolet rays from the ultraviolet light sources in each row is provided between the two rows of ultraviolet light sources.
  • a reflective member can also be provided. In this way, the following effects can be obtained.
  • the length of the light source in the conveying direction becomes long. For example, if the height of the reflecting member is low, the ultraviolet rays emitted from the ultraviolet light source are likely to diffuse, Local irradiation may not be possible.
  • an intermediate reflecting member is provided between the two rows of ultraviolet light sources as described above, the ultraviolet rays emitted from each row can be easily reflected, and the illuminance on the substrate can be further improved.
  • the ultraviolet irradiation apparatus According to the ultraviolet irradiation apparatus according to the present invention, it is possible to efficiently irradiate the printed material with ultraviolet rays emitted from an ultraviolet light source such as an LED, thereby effectively curing the ink.
  • an ultraviolet light source such as an LED
  • FIG. 1 is a schematic side view showing an embodiment of a printing machine equipped with an ultraviolet irradiation device according to the present invention. It is a top view of FIG. It is a perspective view of one embodiment of an ultraviolet irradiation device concerning the present invention.
  • FIG. 4 is a bottom view of FIG. 3.
  • FIG. 4 is a plan view of FIG. 3. It is the perspective view which permeate
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. It is a perspective view which shows schematic structure of an ultraviolet irradiation part. It is an expanded sectional view showing a schematic structure of an ultraviolet irradiation part. It is a perspective view which shows the assembly of a 2nd reflection member.
  • FIG. 4 is a bottom view of FIG. 3.
  • FIG. 4 is a plan view of FIG. 3. It is the perspective view which permeate
  • FIG. 6 is a cross-sectional view taken along line AA
  • FIG. 8 is a sectional view taken along line BB in FIG. It is an expanded sectional view showing an example of ultraviolet irradiation in an ultraviolet irradiation part. It is a figure which shows the example of the illumination intensity of the ultraviolet-ray which a to-be-printed material receives. It is an expanded sectional view showing an example of ultraviolet irradiation in an ultraviolet irradiation part. It is an expanded sectional view showing other schematic structures of an ultraviolet irradiation part. It is a figure which shows the expanded sectional view and simulation result which show other schematic structure of an ultraviolet irradiation part. It is a figure which shows the shape etc. of ultraviolet LED, a reflective member, etc. in an Example.
  • FIG. 1 is a schematic side view of a printing machine equipped with the ultraviolet irradiation device
  • FIG. 2 is a plan view of FIG.
  • the ink used here has ultraviolet curable properties and contains a radical polymerization type or chaotic polymerization type ultraviolet curable resin.
  • the printing machine is provided with printing units 1K, 1C, 1M, 1Y, and 1P for applying the above-described five inks from the right side to the left side of the drawing. Yes.
  • Each printing unit 1 includes an ink supply device 11 that supplies ink.
  • each ink supply device 11 a plate cylinder 12, a rubber cylinder 13, and an impression cylinder 14 to which the ink is transferred face downward. Arranged in this order. Further, an ultraviolet irradiation device 2 that irradiates the printing material P with ultraviolet rays is disposed on the downstream side in the circumferential direction from the position in contact with the rubber cylinder 13 in each impression cylinder 14.
  • a transfer cylinder 15 for transferring the substrate P is disposed between each printing unit 1, a transfer cylinder 15 for transferring the substrate P is disposed. More specifically, a transfer cylinder 15 is arranged between the impression cylinders 14 at the lowermost part of each printing unit 1, and the printing material P to which ink is applied between each rubber cylinder 13 and the impression cylinder 14. Is conveyed by the transfer cylinder 15 to the impression cylinder 14 of the downstream printing unit. It should be noted that the order in which the inks are arranged may be other than those described above.
  • FIGS. 3 is a perspective view of the ultraviolet irradiation device
  • FIG. 4 is a bottom view of FIG. 3
  • FIG. 5 is a plan view of FIG.
  • the ultraviolet irradiation device 2 has a box-shaped casing 21 extending in a long shape, and ultraviolet rays are irradiated from the bottom surface of the casing 21.
  • the direction in which the casing 21 extends is referred to as the longitudinal direction
  • the direction orthogonal thereto is referred to as the width direction
  • the right side in FIG. 3 in the longitudinal direction is referred to as the first end portion
  • the left side is referred to as the second end portion.
  • the width direction may be referred to as “conveying direction” and the longitudinal direction may be referred to as “printing width direction”.
  • a plurality of ultraviolet light emitting diodes that irradiate ultraviolet rays, a control board that controls driving of the ultraviolet LEDs, and the like are disposed inside the housing 21.
  • the length of the casing 21 in the longitudinal direction corresponds to the printing width of the printing material P, and can be irradiated with ultraviolet rays over the entire width of the printing material P.
  • the casing 21 is formed in a pentagonal cross section having a top on the upper side. As shown in FIG. 5, the casing 21 is carried on both ends of one upper surface (upper side in FIG. 5).
  • a handle 22 is attached.
  • the first end of the housing 21 is provided with a water-cooling water supply hole 23 and a discharge hole 24, which will be described later, and is connected to a DC inverter chiller (not shown).
  • a power terminal 25 and a signal terminal 26 that receives and transmits control signals from the printing press are provided in the vicinity of the supply hole 23 and the discharge hole 24.
  • a plurality of slits extending in parallel with the longitudinal direction are formed on the first end side on the upper surface of the housing 21 provided with the handle 22, and these slits constitute an air inlet 27. Yes.
  • an exhaust port 28 for discharging the air in the housing 21 is formed on the end surface of the second end portion.
  • FIGS. 6 is a partially transparent perspective view of FIG. 3, and FIG. 7 is a sectional view taken along line AA of FIG.
  • the inside of the housing 21 is divided into three regions from the bottom to the top, and in each region, the ultraviolet irradiation unit 3, the cooling unit 4, and the control unit 5 are arranged from the bottom. Has been placed.
  • the ultraviolet irradiation unit 3 includes a support substrate 31 that abuts a lower surface 413 of a cooling block 41 of the cooling unit 4 described later, and a plurality of ultraviolet LEDs (for example, a near-ultraviolet light source having a wavelength of 385 nm) are formed on the lower surface of the support substrate 31. ) 32 is implemented.
  • the plurality of ultraviolet LEDs 32 are arranged in four rows extending in the longitudinal direction, and are configured by two LED units 33 each having two rows. Both LED units 33 are arranged at a predetermined interval in the width direction, and a spacer 34 extending downward is arranged between the units 33.
  • support blocks 35 are arranged at the end portions in the width direction of the ultraviolet irradiation unit 3, and the support blocks 35 and the spacers 34 are arranged at predetermined intervals, so that each LED unit 33 has a predetermined interval.
  • An irradiation space S is formed below each. That is, on both sides of the spacer 34, an irradiation space S through which the ultraviolet light irradiated from each LED unit 33 passes is formed.
  • Each support block 35 is fixed to the side surface of the cooling block 41 by a connecting portion 35a extending upward.
  • a reflector that reflects the irradiated ultraviolet rays downward is arranged.
  • the reflector of the present embodiment reflects the ultraviolet light diffusing from the ultraviolet LED 32 so as to face downward, and is formed of four parts. That is, a pair of first reflecting members 61 fixed to each support block 35 and a pair of second reflecting members 62 fixed to the spacer 34 are configured. And by arrange
  • Each reflecting member can be formed, for example, by coating a reflecting agent on the surface of a plate material such as aluminum. As such a reflector, for example, MIRO (trademark) manufactured by alanod can be used.
  • each first reflecting member 61 is formed of a plate material having a substantially L-shaped cross section, and includes a first reflecting portion 611 extending upward in the irradiation space S along the support block 35.
  • each second reflecting member 62 is also formed of a plate material having a substantially L-shaped cross section, and includes a first reflecting portion 621 extending upward in the irradiation space S along the support block 35 and a lower end of the first reflecting portion 621. And a second reflecting portion 622 extending along the lower surface of the spacer 34.
  • the first reflecting member 61 and the second reflecting member 62 are arranged so as to sandwich the irradiated ultraviolet rays, but the first reflecting portion 611 of each reflecting member 61, 62 is disposed. , 621 are bent in an arc shape surrounding the irradiation space S by two fold lines H extending in the transport direction.
  • the first reflecting portions 611 and 621 of the opposing reflecting members 61 and 62 approximately constitute a part of an ellipse E as shown in FIG. Therefore, it is possible to reflect ultraviolet rays downward with simple processing without forming a complete ellipse.
  • each second reflecting member 62 is not provided with the first reflecting portion 621 over the entire length in the longitudinal direction, but is provided with a predetermined interval as shown in FIG. Accordingly, the two opposing second reflecting members 62 are arranged such that the second reflecting portions 622 are alternately meshed with each other, so that the second reflecting portions 622 continuously extend along the lower surface of the spacer 34. Become.
  • first reflecting portions 611 and 621 of the reflecting members 61 and 62 are formed as follows. As shown in FIG. 9, each of the first reflecting portions 611 and 621 has two fold lines H extending in the transport direction G, thereby forming a part of an approximate ellipse E.
  • the adjacent ultraviolet LEDs 32 are arranged in the vicinity of the focal point of the ellipse E. The distance between the ultraviolet irradiation device 2 and the printing material P is determined so that the printing material P passes through the vicinity of the focal point N below the ellipse E.
  • the dirt prevention plate 37 As shown in FIG. 7, a dirt prevention plate 37 that covers both irradiation spaces S is provided at the bottom of the ultraviolet irradiation unit 3, that is, the bottom surface of the housing 21.
  • the dirt prevention plate 37 is a transparent material that can transmit ultraviolet rays, and is formed of quartz glass or the like.
  • the cooling unit 4 will be described with reference to FIG. 11 is a cross-sectional view taken along line BB in FIG.
  • the cooling unit 4 has a flat cooling block 41 formed of a material having high thermal conductivity such as aluminum.
  • the support substrate 31 of the ultraviolet LED 32 is attached to the lower surface of the cooling block 41.
  • a known heat dissipation is provided between the lower surface of the cooling block 41 and the support substrate 31. Grease is applied. Thereby, the unevenness
  • a U-shaped groove 412 to which water for water cooling is supplied is formed on the upper surface 411 of the cooling block 41. More specifically, as shown in FIGS. 7 and 11, the groove 412 is formed in a U shape in a plan view in which a first passage 412 a and a second passage 412 b extending in the longitudinal direction of the housing 21 are connected.
  • the water supplied from the supply hole 23 passes through the U-shaped groove 412, reciprocates the cooling block 41, and is discharged from the discharge hole 24. That is, the water passing through the first passage 412a arranged on the right side of FIG.
  • Each of the passages 412a and 4b has a rectangular cross section, and is disposed above each of the LED units 33.
  • a rectangular lid member 42 is disposed on the upper surface 411 of the cooling block 41 so as to cover the groove 412, and a sheet-like heat insulating material 43 is disposed at a contact portion between the cooling block 41 and the lid member 42.
  • the lid member 42 is made of a material having high thermal conductivity such as aluminum or SUS, and extends in the longitudinal direction of the housing 21 so as to cover the entire U-shaped groove 412. Further, the heat insulating material 43 is disposed in a portion other than the groove 412 formed on the upper surface of the cooling block 41, and prevents the heat of the cooling block 41 from being conducted to the lid member 42.
  • the heat insulating material 43 also plays a role of a gasket so that water flowing through the groove 412 is sealed by the lid member 42.
  • a heat insulating material 43 for example, a heat insulating sheet material formed of a resin tetrafluoride ethylene resin having high heat resistance and high heat insulating properties, or a heat insulating sheet material formed of silicon rubber can be used.
  • seat material which plays only the role as a gasket can also be used, In that case, although the heat insulation effect becomes small, you may cover the whole upper surface of the cooling block 41.
  • control unit 5 will be described with reference to FIGS. 6 and 7.
  • the control unit 5 has a pair of first heat conducting members 51 extending upward from the lid member 42, and controls the driving of the ultraviolet LED 32 to the first heat conducting member 51.
  • a substrate 52 is supported.
  • the control board 52 is composed of components such as FETs, coils, and diodes.
  • a constant current circuit is disposed, and the power supplied from the power supply terminal 25 is supplied to each ultraviolet LED 32 with a set current value.
  • a CPU a communication circuit with the control board of the printer main body, a control circuit for the cooling fan, a circuit for recording the cumulative irradiation time of the ultraviolet LED 32, and the like are arranged and transmitted from the printer via the signal terminal 26.
  • the drive of the ultraviolet LED 32 is controlled on the basis of the signal to be transmitted.
  • the pair of first heat conducting members 51 do not necessarily have the same shape, and may have different shapes as shown in FIG.
  • Each first heat conducting member 51 that supports the control board 52 is formed of a plate material having high heat conductivity such as aluminum or copper, and has a bottom portion 511 disposed on the lid member 42 and an upper end from one end of the bottom portion 511. It is formed in an L-shaped cross section including an extending portion 512 that extends. And the extension part 512 of both the 1st heat conductive members 51 is united so that it may oppose, and it has made the reverse T-shape. In other words, the combined extension portion 512 is disposed between the first and second passages 412a, 4b of the cooling block 41 and extends upward, and the bottom portions 511 are disposed so as to cover the passages 412a, b, respectively. ing.
  • a control board 52 is attached to each extending portion 512 via an insulating material 53 having thermal conductivity, and each control board 52 is disposed so as to face both sides of the housing 21. With such a structure, an air cooling space F through which air for air cooling flows is formed between the inner wall surfaces on both sides of the housing 21 and the control board 52.
  • each first heat conducting member 51 a second heat conducting member 54 that is in contact with the control board 52 is attached.
  • Each second heat conducting member 54 is in contact with the bottom 541 that contacts the first heat conducting member 51, the L-shaped step 542 that forms a space between the control board 52, and the lower part of the control board 52. It is formed by connecting the parts 543. Therefore, the second conductive member 54 can also conduct the heat of the control board 52 to the lid member 42 via the first conductive member 51.
  • seat material similar to the insulating material 54 mentioned above is provided also between the contact part 543 of the 2nd heat conductive member 54, and the control board 52.
  • FIG. As such a sheet material, for example, a known heat dissipation silicon sheet can be used.
  • the air cooling space F is formed in the control unit 5.
  • a cooling fan for flowing air into the air cooling space F is provided at the second end of the casing 21. 55 is attached.
  • a known axial fan can be used as such a cooling fan 55.
  • this cooling fan 55 is driven, air in the air cooling space F is discharged from the exhaust port 28 at the second end via the cooling fan 55. It has come to be.
  • ink is applied to the printing material P by the printing units 1K, 1C, 1M, 1Y, and 1P.
  • the ink supplied from each ink supply device 11 to the plate cylinder 12 is transferred to the rubber cylinder 13 and then passes between the rubber cylinder 13 and the impression cylinder 14. It is applied to the substrate P.
  • the ink on the printing material P is cured by the ultraviolet rays irradiated from the ultraviolet irradiation device 2, and sent to the next printing unit 1 by the transfer cylinder 15.
  • ink is applied and cured in the same manner, the inks are superimposed and a full-color image is formed, and then conveyed outside the printing press.
  • the ultraviolet irradiation device water is supplied to the cooling block 41 prior to the start of printing.
  • the temperature of the water supplied from the supply hole 23 can be about 25 ° C., and water having a temperature higher by about 5 to 10 ° C., for example, is discharged from the discharge hole 24 by heat exchange described later.
  • the ultraviolet LED 32 emits ultraviolet light, and the irradiation intensity of the ultraviolet LED is adjusted by the control board 52 in accordance with a signal from the printing press.
  • the ultraviolet irradiation device 2 is driven, heat generated by the ultraviolet LED 32 is exchanged with water via the cooling block 41, and the ultraviolet LED 32 is cooled.
  • the heat generated in the control board 52 is also cooled by exchanging heat with water via the first and second heat conducting members 51 and 54 and the lid member 42.
  • the first and second heat conducting members 51 and 54 are disposed above the groove 412 through which water flows, the heat generated in the control board 52 can be efficiently conducted to water.
  • the first and second heat conducting members 51 and 54 are arranged so as to sandwich the control board 52, heat is transmitted from both the front and back surfaces of the control board 52. Therefore, the cooling effect is high.
  • FIG. 5 by driving the cooling fan 55, air X flows from the air inlet 27 formed at the first end of the housing 21, and the air cooling space F in the housing 21 is moved in the longitudinal direction. While passing, the air is discharged from the exhaust port 28 at the second end. In this process, the control board 52 is cooled not only by the cooling block 41 but also by the circulating air X.
  • the ultraviolet light emitted from the ultraviolet LED 32 is further away from the LED 32, the incident angle to the printed material P becomes larger, and when the ultraviolet ray is more than a predetermined reference angle ⁇ , the amount of reflection from the printed material P increases, The irradiation amount to the printing material P that has an influence becomes weak. As a result, the ink may not be hardened.
  • the ultraviolet ray R 0 from which the incident angle ⁇ from the ultraviolet LED 32 to the substrate P is equal to or larger than the reference angle ⁇ is sent to each first reflecting portion.
  • the ink can be effectively cured.
  • the upper part of the upper fold H of each of the reflecting members 61 and 62 is formed at an angle that reflects the ultraviolet light so as to be smaller than the reference angle ⁇ .
  • the stain prevention plate 37 is formed of quartz glass or the like, when the irradiated ultraviolet rays enter the stain prevention plate 37, total reflection occurs on the lower surface of the stain prevention plate 37, and the substrate P There is a possibility that ultraviolet rays are not irradiated to the side.
  • the reflector as described above is arranged between the light source unit 33 and the anti-stain plate 37, total reflection in the anti-stain plate 37 can be prevented, and ultraviolet rays from the LED can be printed. It is possible to reliably irradiate P. Such an effect can be obtained in the same manner even when a lens is disposed between the light source and the substrate.
  • the positions of the first reflecting portions 611 and 621 are set as follows. That is, the ultraviolet rays irradiated near the lower ends of the first reflecting portions 611 and 621 have an incident angle ⁇ with respect to the printing material P and are smaller than the reference angle ⁇ .
  • the lower ends of the first reflecting portions 611 and 621 are extended downward so as to be separated from the LED unit, so that ultraviolet rays having an incident angle smaller than the reference angle are also reflected. By doing so, ultraviolet light can be irradiated in the vicinity of the LED unit 33, so that the peak ultraviolet illuminance can be improved.
  • the ultraviolet rays reflected from the printing material P are transmitted to the second reflecting portions 612 and 622. Can be reflected toward the substrate P (see the dotted arrow). As a result, the illuminance of ultraviolet rays on the substrate P can be further improved.
  • the LED units 33 in two rows are arranged at a predetermined interval, the ultraviolet rays emitted from the LED units 33 are overlapped with each other. Thereby, the illumination intensity of the ultraviolet rays received by the substrate P between the LED units 33 can be further improved.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
  • the reflecting member is formed in two folds, but the present invention is not limited to this, and it may be approximated to an ellipse by making one or three or more folds.
  • a part of the block can be cut out to form the reflection surface.
  • the 1st reflection parts 611 and 621 can also be formed along the inclined ellipse.
  • the major axis Y of the two ellipses E is inclined so as to intersect on the substrate P side.
  • the high illuminance portions directly below the ultraviolet LEDs 32 are superposed close to each other, so that the peak illuminance is increased. be able to.
  • an intermediate reflector 800 can be provided between the two rows of ultraviolet LEDs 32.
  • a gap between two rows of ultraviolet LEDs 32 is widened, and a V-shaped intermediate reflecting member 800 in which two reflecting plates are integrally connected is disposed in the gap.
  • the height of the intermediate reflecting member 800 is lower than the height of the reflecting member 61, it can reflect the ultraviolet rays emitted from the row of the ultraviolet LEDs 32. Thereby, it can prevent that the ultraviolet-ray emitted from each row
  • the shape of the intermediate reflecting member 800 is not particularly limited as long as it is a shape that can reflect the ultraviolet rays irradiated from each row, even if it is other than the V-shape.
  • it can be constituted by two reflecting plates facing each reflecting member, or can be constituted by one reflecting plate extending substantially in parallel with each reflecting member.
  • the ultraviolet LED 32 is used.
  • the ultraviolet LED 32 is not particularly limited as long as it can irradiate ultraviolet rays.
  • an ultraviolet laser diode or a laser light source that emits ultraviolet rays can be used.
  • an ultraviolet LED having a shape as shown in FIG.
  • UV LED UV light source
  • LED unit light source unit

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  • General Health & Medical Sciences (AREA)
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Abstract

La présente invention concerne un dispositif de rayonnement d'ultraviolets qui peut efficacement faire rayonner des ultraviolets provenant d'une source d'ultraviolets sur un objet qui doit être imprimé, et peut efficacement faire sécher l'encre. Le dispositif de rayonnement d'ultraviolets décrit qui fait rayonner les ultraviolets sur l'encre se trouvant sur un objet qui doit être imprimé est pourvu d'au moins une unité source de lumière comportant plusieurs sources de lumière ultraviolette alignées le long de la direction de largeur d'impression qui est orthogonale à la direction d'acheminement de l'objet qui doit être imprimé, et d'une paire d'éléments de réflexion qui sont agencés entre l'unité source de lumière et l'objet qui doit être imprimé, et sont agencés de manière à enfermer chaque unité source de lumière depuis le côté amont et le côté aval dans la direction d'acheminement. Chaque élément de réflexion comporte une première section de réflexion qui s'étend depuis la source de lumière ultraviolette vers l'objet qui doit être imprimé, et l'ensemble ou au moins une partie de la première section de réflexion, l'angle d'incidence de la source d'ultraviolets vers l'objet qui doit être imprimé n'était pas inférieur à un angle de référence prescrit, réfléchit les faibles ultraviolets qui contribuent probablement peu au durcissement de la section intérieure d'encre, d'une manière telle que l'angle d'incidence est inférieur à l'angle de référence.
PCT/JP2011/055816 2010-07-30 2011-03-11 Dispositif de rayonnement d'ultraviolets WO2012014518A1 (fr)

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JP2012526342A JPWO2012014518A1 (ja) 2010-07-30 2011-03-11 紫外線照射装置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434265A (zh) * 2013-09-06 2013-12-11 常德金鹏印务有限公司 一种丝网印刷机及其干燥装置
JP2015199202A (ja) * 2014-04-04 2015-11-12 リョービＭｈｉグラフィックテクノロジー株式会社 印刷機
CN112246576A (zh) * 2020-08-28 2021-01-22 广东喜珍电路科技有限公司 一种pcb油墨固化装置
EP4000938A1 (fr) * 2019-04-02 2022-05-25 Heidelberger Druckmaschinen AG Dispositif de durcissement de l'encre uv sur une matière à imprimer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424752A (en) * 1987-07-21 1989-01-26 Ushio Electric Inc Ultraviolet ray irradiation apparatus
JPH04140141A (ja) * 1990-09-30 1992-05-14 Toshiba Lighting & Technol Corp 紫外線照射装置
JPH06338205A (ja) * 1993-05-31 1994-12-06 Iwasaki Electric Co Ltd 照射器用反射体
JPH08152270A (ja) * 1994-11-29 1996-06-11 Ushio Inc 紙乾燥機
JP2004188975A (ja) * 2002-12-06 2004-07-08 Man Roland Druckmas Ag 印刷機の乾燥器のためのエキシマ放射体
JP2009137302A (ja) * 2007-12-07 2009-06-25 Heidelberger Druckmas Ag 印刷された材料を乾かす方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424752A (en) * 1987-07-21 1989-01-26 Ushio Electric Inc Ultraviolet ray irradiation apparatus
JPH04140141A (ja) * 1990-09-30 1992-05-14 Toshiba Lighting & Technol Corp 紫外線照射装置
JPH06338205A (ja) * 1993-05-31 1994-12-06 Iwasaki Electric Co Ltd 照射器用反射体
JPH08152270A (ja) * 1994-11-29 1996-06-11 Ushio Inc 紙乾燥機
JP2004188975A (ja) * 2002-12-06 2004-07-08 Man Roland Druckmas Ag 印刷機の乾燥器のためのエキシマ放射体
JP2009137302A (ja) * 2007-12-07 2009-06-25 Heidelberger Druckmas Ag 印刷された材料を乾かす方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434265A (zh) * 2013-09-06 2013-12-11 常德金鹏印务有限公司 一种丝网印刷机及其干燥装置
JP2015199202A (ja) * 2014-04-04 2015-11-12 リョービＭｈｉグラフィックテクノロジー株式会社 印刷機
EP4000938A1 (fr) * 2019-04-02 2022-05-25 Heidelberger Druckmaschinen AG Dispositif de durcissement de l'encre uv sur une matière à imprimer
CN112246576A (zh) * 2020-08-28 2021-01-22 广东喜珍电路科技有限公司 一种pcb油墨固化装置

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