WO2014170934A1 - 印刷機及びその紫外線照射方法 - Google Patents
印刷機及びその紫外線照射方法 Download PDFInfo
- Publication number
- WO2014170934A1 WO2014170934A1 PCT/JP2013/006933 JP2013006933W WO2014170934A1 WO 2014170934 A1 WO2014170934 A1 WO 2014170934A1 JP 2013006933 W JP2013006933 W JP 2013006933W WO 2014170934 A1 WO2014170934 A1 WO 2014170934A1
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- Prior art keywords
- printing
- ultraviolet
- unit
- paper discharge
- ultraviolet light
- Prior art date
Links
- 238000007639 printing Methods 0.000 title claims abstract description 436
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000001678 irradiating effect Effects 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims description 10
- 238000007645 offset printing Methods 0.000 claims description 9
- 238000007646 gravure printing Methods 0.000 claims description 6
- 239000000123 paper Substances 0.000 description 108
- 238000007774 anilox coating Methods 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 150000008062 acetophenones Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical class C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical class C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/08—Combinations of endless conveyors and grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/10—Combinations of transfer drums and grippers
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/02—Arrangements of indicating devices, e.g. counters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/22—Rotary letterpress machines for indirect printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/01—Rotary intaglio printing presses for indirect printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/02—Rotary intaglio printing presses for multicolour printing
- B41F9/021—Sheet printing presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
Definitions
- the present invention relates to a printing machine and an ultraviolet irradiation method thereof, and more specifically, printing that can reliably irradiate a sufficient amount of ultraviolet rays and prevent curing failure of ultraviolet curable ink without the need for repeated trial runs.
- the present invention relates to a machine and its ultraviolet irradiation method.
- Sheet means a substrate to be printed that has been trimmed to a specified dimension. That is, in a sheet-fed printing press, not a single long sheet to be printed, but the trimmed sheets to be printed one by one continuously.
- These printing methods generally employ a method in which an ultraviolet curable ink is printed on a printing medium such as paper by a printing apparatus, and then the ultraviolet curable ink is cured by an ultraviolet irradiator.
- offset printing that uses ink to print on the printing surface of a traveling printing substrate via a printing plate installed on the outer periphery of the plate cylinder and a blanket installed on the outer periphery of the blanket cylinder, and cures by irradiating ultraviolet rays.
- a machine is known (see, for example, Patent Document 1).
- the irradiation amount of the ultraviolet ray by the ultraviolet ray irradiator generally tends to vary, and the deterioration with time is severe. For this reason, conventionally, it has been necessary to repeatedly perform a trial run before the actual operation, and to determine the irradiation amount of the ultraviolet rays based on the empirical rule of the skilled worker by looking at the cured state of the ultraviolet curable ink.
- the present invention has been made in view of the above circumstances, and there is no need to repeatedly perform a trial run, and a printing machine capable of reliably irradiating a sufficient amount of ultraviolet rays and preventing poor curing of ultraviolet curable ink and its It aims at providing the ultraviolet irradiation method.
- an ultraviolet ray receiver is attached to the printing unit gripper and / or the paper discharge unit gripper for gripping and guiding the print body, and the ultraviolet ray receiver directly receives light from the ultraviolet irradiation device.
- the present inventors have found that the above problems can be solved unexpectedly by adjusting the amount of ultraviolet rays irradiated by an ultraviolet irradiator on the basis of the amount of ultraviolet rays thus completed, and have completed the present invention.
- the present invention includes (1) a plurality of impression cylinders to which grippers for gripping and guiding the printing medium are attached, and printing with ultraviolet curable ink on the printing medium in contact with the impression cylinder to obtain a printing medium.
- a printing unit including a printing apparatus, and a paper discharge unit including a chain to which a gripper for gripping and guiding the printed body is provided, and includes an ultraviolet irradiator for irradiating the printed body with ultraviolet rays.
- the gripper facing the ultraviolet irradiator exists in a printing machine in which a printing unit ultraviolet light receiver capable of receiving ultraviolet light is attached.
- the printing unit includes a printing unit ultraviolet irradiator for irradiating the printing body guided by the impression cylinder with ultraviolet rays, and the gripper of the printing unit has a printing unit capable of receiving ultraviolet rays. It exists in the printing machine of the said (1) description to which the ultraviolet light receiver is attached.
- the paper discharge unit is provided with a paper discharge unit ultraviolet irradiator for irradiating the printed material guided by the chain with ultraviolet rays, and the gripper of the paper discharge unit can receive ultraviolet rays.
- the present invention resides in the printing machine described in the above (1), to which a discharge unit ultraviolet light receiver is attached.
- the printing unit includes a printing unit ultraviolet irradiator for irradiating the printing body guided by the impression cylinder with ultraviolet rays, and the gripper of the printing unit has a printing unit capable of receiving ultraviolet rays.
- An ultraviolet ray receiver is attached, and the paper discharge unit is equipped with a paper discharge unit UV irradiator for irradiating the printed material guided by the chain with ultraviolet rays. It exists in the printing machine of the said (1) description to which the paper part ultraviolet light receiver is attached.
- the present invention resides in the printing machine according to (2) or (4), wherein (5) the printing unit ultraviolet light receiver is detachable from the printing unit gripper.
- the present invention resides in (6) the printing press according to the above (3) or (4), wherein the discharge unit ultraviolet light receiver is detachable from the discharge unit gripper.
- the present invention resides in (7) the printing press according to the above (2) or (4), wherein the impression cylinder is provided with a groove portion capable of accommodating the printing unit gripper and the printing unit ultraviolet light receiver.
- the present invention resides in the printing machine according to (2) or (4), which is (8) a sheet-fed gravure printing machine or a sheet-fed flexographic printing machine.
- the present invention resides in (9) the printing press according to (3) or (4), which is a sheet-fed offset printing press.
- the present invention relates to (10) an ultraviolet irradiation method of a printing press using the printing press according to (2) or (4) above, wherein the printing unit ultraviolet receiver receives light from the printing unit ultraviolet irradiation device during operation.
- the present invention resides in an ultraviolet irradiation method for a printing press that adjusts the amount of ultraviolet light irradiated by a printing unit ultraviolet irradiation device based on the amount of ultraviolet light.
- the present invention relates to (11) an ultraviolet irradiation method for a printing press using the printing press according to (3) or (4) above, wherein the paper discharge unit ultraviolet light receiver is operated during operation.
- the present invention resides in an ultraviolet irradiation method of a printing press that adjusts the amount of ultraviolet light irradiated by a paper discharge unit ultraviolet irradiation device based on the amount of ultraviolet light received from the printer.
- the present invention resides in the ultraviolet irradiation method according to (10) or (11), wherein (12) information on the amount of ultraviolet rays is transmitted to the CPU, and the amount of ultraviolet rays is adjusted based on the information.
- the printing unit ultraviolet light receiver is attached to the gripper of the printing unit that holds and guides the printing body, so that the printing unit ultraviolet light receiver of the printing unit directly receives light from the printing unit ultraviolet irradiation machine. Since the amount of ultraviolet rays equivalent to the amount of ultraviolet rays can be received, the amount of ultraviolet rays irradiated by the printing unit ultraviolet ray irradiator is adjusted based on the amount of ultraviolet rays received by the printing unit ultraviolet ray receiver from the printing unit ultraviolet ray irradiator. Thus, there is no need to repeatedly perform a trial run, and it is possible to reliably irradiate the printed body with a sufficient amount of ultraviolet rays in the actual run. Thereby, it is possible to reliably prevent the curing failure of the ultraviolet curable ink of the printed body.
- the discharge unit ultraviolet ray receiver is attached to the gripper of the discharge unit that grips and guides the print body. Because it can receive the same amount of ultraviolet light that is received directly from the machine, the paper discharge unit UV light receiver irradiates with the paper discharge unit UV irradiator based on the amount of ultraviolet light received from the paper discharge unit UV irradiator.
- the amount of ultraviolet rays to be performed it is not necessary to repeatedly perform a trial run, and it is possible to reliably irradiate the printed body with a sufficient amount of ultraviolet rays in the actual run. Thereby, it is possible to reliably prevent the curing failure of the ultraviolet curable ink of the printed body.
- the printing machine has a printing unit ultraviolet light receiver attached to a gripper of a printing unit that grips and guides a printing body, and a paper discharge unit ultraviolet light receiver is attached to a gripper of a paper discharge unit that grips and guides the printing body.
- the printing unit ultraviolet light receiver can receive an ultraviolet light amount equivalent to the ultraviolet light amount directly received by the printing body from the printing unit ultraviolet light irradiator. It is possible to receive an ultraviolet ray amount equivalent to the ultraviolet ray amount directly received from the paper discharge unit ultraviolet irradiator.
- the amount of ultraviolet light irradiated by the printing unit ultraviolet light irradiation device is adjusted, and the paper discharging unit ultraviolet light receiver irradiates the paper discharging unit ultraviolet light. Based on the amount of ultraviolet light received from the machine, by adjusting the amount of ultraviolet light irradiated by the paper discharge unit ultraviolet light irradiation device, it is not necessary to perform a trial run repeatedly, and in this operation, a desired amount of ultraviolet light is irradiated to the printed body. It becomes possible.
- the ultraviolet curable ink can be temporarily cured in the printing unit, it is possible to reduce the irradiation amount of ultraviolet rays to the respective printed bodies in the printing unit ultraviolet irradiation machine and the paper discharge unit ultraviolet irradiation machine. As a result, the burden on the ultraviolet irradiator is reduced, so that deterioration of the ultraviolet lamp over time can be suppressed. Further, by pre-curing, contamination due to ink transfer from the printing medium to the offset printing machine in the manufacturing process can be prevented.
- the ultraviolet light receiver when the printing unit ultraviolet receiver is detachable from the gripper of the printing unit, or the discharge unit ultraviolet receiver is detachable from the gripper of the discharge unit.
- the ultraviolet light receiver can be easily replaced, and the ultraviolet light receiver can be attached to a desired position as required.
- the impression cylinder is formed with a groove that can accommodate the gripper of the printing unit and the ultraviolet receiver of the printing unit, so that the gripper of the printing unit and the ultraviolet receiver of the printing unit convey the substrate to be printed. Does not get in the way.
- the printing unit ultraviolet ray irradiation machine uses the printing machine according to the above (1) or (3), and the printing unit ultraviolet ray receiver receives the ultraviolet ray amount received from the printing unit ultraviolet ray irradiation machine.
- the amount of ultraviolet rays to be irradiated by this a sufficient amount of ultraviolet rays can be reliably irradiated, and curing failure of the ultraviolet curable ink can be prevented.
- the ultraviolet ray irradiated by the discharge unit ultraviolet irradiation device based on the amount of ultraviolet rays received by the discharge unit ultraviolet ray receiver from the discharge unit ultraviolet irradiation device. By adjusting the amount, it is possible to reliably irradiate a sufficient amount of ultraviolet rays and prevent curing failure of the ultraviolet curable ink.
- the amount of ultraviolet rays is transmitted to the CPU, and the amount of ultraviolet rays can be adjusted quickly by adjusting the amount of ultraviolet rays based on the information.
- information on the amount of ultraviolet rays over time can be stored in the CPU, it is possible to predict the degree of deterioration of the ultraviolet irradiator, a method for adjusting the amount of ultraviolet rays, and the like by analyzing the information.
- FIG. 1 is a schematic side view showing a printing press according to the first embodiment.
- FIG. 2 is a schematic perspective view illustrating an impression cylinder of a printing unit in the printing press according to the first embodiment.
- FIG. 3 is a schematic perspective view showing a part of the chain of the paper discharge unit in the printing press according to the first embodiment.
- FIG. 4 is a schematic side view illustrating a state in which the paper discharge unit gripper grips the printed body in the printing press according to the first embodiment.
- FIG. 5 is a schematic side view showing a printing press according to the second embodiment.
- FIG. 6 is a schematic side view showing a printing press according to the third embodiment.
- FIG. 1 is a schematic side view showing a printing press according to the first embodiment.
- the printing press 100 includes a printing unit A that prints on the printing medium 1 and a paper discharge unit B that collects the printed body 1a. Note that a paper feeding unit that supplies the printing medium 1 to the printing unit A is omitted.
- the printing unit A includes a plurality of impression cylinders 2 each having a gripper 11 (hereinafter referred to as a “printing unit gripper”) that holds and guides the printing body 1, and the printing body 1 that is in contact with each impression cylinder 2.
- a printing apparatus comprising a blanket cylinder 3 that is printed with ultraviolet curable ink to form a printed body 1a, a plate cylinder 3a that transfers the ultraviolet curable ink to the blanket cylinder 3, and an ultraviolet light reception (not shown) attached to the printing unit gripper 11.
- an ultraviolet irradiator 22 hereinafter referred to as a “printing unit ultraviolet ray irradiator” for irradiating the printed material 1 guided by the impression cylinder 2 with ultraviolet rays.
- the ultraviolet curable ink applied to the so-called plate cylinder 3a is transferred to the rubber blanket cylinder 3, and is transferred from the blanket cylinder 3 to the printing medium 1 conveyed by the impression cylinder 2 described later. UV curable ink is printed. Since the printing unit A includes a plurality of plate cylinders 3a, blanket cylinders 3 and impression cylinders 2, it is possible to apply a plurality of different designs to the printing medium 1 in an overlapping manner.
- FIG. 2 is a schematic perspective view illustrating an impression cylinder of a printing unit in the printing press according to the first embodiment.
- the impression cylinder 2 in the printing press 100, the impression cylinder 2 has a cylindrical shape and is rotatable about a central axis. Further, a groove 4 is formed on the surface of the impression cylinder 2 along the axial direction of the impression cylinder 2, and a similar groove 4 is also formed on the surface of the impression cylinder 2 on the opposite side (the back side in the drawing). Has been. That is, the grooves 4 are formed on the surface of the impression cylinder 2 at symmetrical positions.
- a printing unit gripper 11 is accommodated and fixed in each groove 4.
- the printing unit gripper 11 can grip one end of the printing medium 1.
- the other end of the printing medium 1 is not gripped. Therefore, the printing body 1 is transported along the peripheral surface of the impression cylinder 2 when the impression cylinder 2 rotates while the printing unit gripper 11 grips the printing object 1. .
- a printing unit ultraviolet light receiver 22a is attached at a substantially central position of the printing unit gripper 11. That is, the printing unit gripper 11 and the printing unit ultraviolet light receiver 22a are accommodated in the groove 4 of the impression cylinder 2. Thus, since the printing part gripper 11 and the printing part ultraviolet light receiver 22a are accommodated in the groove part 4, the printing part gripper 11 and the printing part ultraviolet light receiver 22a do not interfere with the conveyance of the printing medium 1.
- the printing unit ultraviolet light receiver 22a has a small box shape in which the light receiving part L is formed on the upper surface.
- the printing unit ultraviolet light receiver 22a can wirelessly transmit information on the amount of ultraviolet rays received by the light receiving unit L, and when the information is received by a receiving unit of an external CPU, the CPU The amount of ultraviolet rays can be displayed on the display. Since the CPU is used, information on the amount of ultraviolet rays can be accumulated, and information on the voltage and current in the printing unit ultraviolet irradiator 22, the lamp temperature of the printing unit ultraviolet irradiator 22, the speed of the printing medium 1 and the like can be stored. By analyzing the above, it is possible to predict the deterioration of the printing unit ultraviolet irradiator 22, the method for adjusting the amount of ultraviolet rays, and the like.
- the printing unit ultraviolet light receiver 22 a is detachable from the printing unit gripper 11. For this reason, the replacement of the printing unit ultraviolet light receiver 22a is facilitated, and the printing unit ultraviolet light receiver 22a can be attached to a desired position as necessary.
- each groove section 4 corresponds to each other when the adjacent impression cylinder 2 rotates. It is formed so that it will be a position to do.
- the printing medium 1 held by the printing unit gripper 11 accommodated in the groove part 4 of the impression cylinder 2 is smoothly conveyed by the rotation of the impression cylinder 2 and is moved to the position of the groove part 4 of the adjacent impression cylinder 2.
- the printing medium 1 is delivered to the printing part gripper 11 accommodated in the groove part 4 of the adjacent impression cylinder 2 and is conveyed by the rotation of the adjacent impression cylinder 2.
- the printing medium 1 is printed with ultraviolet curable ink on each impression cylinder 2, the rotation of each impression cylinder 2, and the printing part gripper 11 provided on each impression cylinder 2.
- This delivery principle is the same as that of a conventional printing machine.
- the printing unit ultraviolet irradiator 22 is installed on the printing medium 1 guided by the impression cylinder 2 through a mounting frame (not shown) in the axial direction of the impression cylinder 2 at a position where ultraviolet rays can be irradiated.
- the printing unit ultraviolet irradiator 22 may be installed in the internal space of the printing press 100 so as to face the impression cylinder 2.
- the paper discharge unit B includes a chain 5 provided with a gripper 12 (hereinafter referred to as “paper discharge unit gripper”) for gripping and guiding the printed body 1 a and ultraviolet rays (not shown) attached to the paper discharge unit gripper 12.
- a light receiver hereinafter referred to as “paper discharge unit ultraviolet light receiver”
- an ultraviolet irradiator 21 hereinafter referred to as “paper discharge unit ultraviolet light irradiator” for irradiating the printed material 1 a guided by the chain 5 with ultraviolet light.
- a collection unit 7 for collecting the printed body 1a.
- the printed body 1a on which the ultraviolet curable ink is printed is conveyed by the chain 5, and the printed ultraviolet curable ink is reliably cured by the paper discharge unit ultraviolet irradiator 21 on the way, The product is then collected.
- FIG. 3 is a schematic perspective view showing a part of the chain of the paper discharge unit in the printing press according to the first embodiment.
- the printed body 1a is not shown.
- a pair of chains 5 are provided so as to move along the frame bodies 6 provided on both sides.
- the pair of chains 5 is provided with a paper discharge unit gripper 12. For this reason, the paper discharge unit gripper 12 moves together with the chain 5.
- the printed body 1a is conveyed along with the movement of the chain 5 by moving the chain 5 while the printed body 1a is held by the paper discharge unit gripper 12.
- the structure of the paper discharge unit gripper 12 is the same as the structure of the printing unit gripper 11, and similarly, the structure of the paper discharge unit ultraviolet light receiver 21a is the same as the structure of the printing unit ultraviolet light receiver 22a.
- the discharge unit ultraviolet light receiver 21a can wirelessly transmit information on the amount of ultraviolet rays received by the light receiving unit L, and the CPU can be received by receiving the information by an external CPU.
- the amount of ultraviolet rays can be displayed on the display section.
- the CPU since the CPU is used, it is possible to accumulate information on the amount of ultraviolet rays, and at the same time, the voltage and current in the paper discharge unit ultraviolet irradiator 21, the lamp temperature of the paper discharge unit ultraviolet irradiator 21, the speed of the printing medium 1, etc. By analyzing this information, it is possible to predict the deterioration of the paper discharge unit ultraviolet irradiator 21, the method of adjusting the amount of ultraviolet rays, and the like.
- the paper discharge unit ultraviolet light receiver 21a is detachable with respect to the paper discharge unit gripper 12, similarly to the printing unit ultraviolet light receiver 22a. Therefore, it is easy to replace the paper discharge unit ultraviolet light receiver 21a, and the paper discharge unit ultraviolet light receiver 21a can be attached to a desired position as required.
- FIG. 4 is a schematic side view illustrating a state in which the paper discharge unit gripper grips the printed body in the printing press according to the first embodiment.
- the paper discharge unit gripper 12 can grip one end of the printed body 1a.
- a paper discharge unit ultraviolet light receiver 21 a is attached to a substantially central position of the paper discharge unit gripper 12.
- the paper discharge unit B when the print body 1a is conveyed by the paper discharge unit gripper 12, wind is blown to the lower surface of the print body 1a. That is, an air blower (not shown) is provided below the printing body 1a, and when the wind blows from the air blowing apparatus, the printing body 1a is slacked downward in a state substantially parallel to the chain 5. It is conveyed without.
- an air blower (not shown) is provided below the printing body 1a, and when the wind blows from the air blowing apparatus, the printing body 1a is slacked downward in a state substantially parallel to the chain 5. It is conveyed without.
- a plurality of paper discharge unit grippers 12 are arranged at equal intervals with a distance of a half circumference of the impression cylinder 2 with respect to the longitudinal direction of the chain 5. That is, when the impression cylinder 2 (the impression cylinder 2 at the left end in the drawing) rotates, the paper discharge section gripper 12 is arranged so as to be in a position corresponding to the printing section gripper 11 attached to the impression cylinder 2. Has been. As a result, the printed body 1a held by the printing unit gripper 11 accommodated in the groove 4 of the impression cylinder 2 is delivered to the paper discharging unit gripper 12 attached to the chain 5 when it reaches the position of the chain 5. And is conveyed by the chain 5. The printing unit gripper 11 and the paper discharge unit gripper are provided at corresponding positions so that the printed body 1a can be smoothly delivered.
- the paper discharge unit ultraviolet irradiator 21 is installed at a position where the print body 1 a guided by the chain 5 can be irradiated with ultraviolet rays.
- the paper discharge unit ultraviolet irradiator 21 may be installed in the internal space of the printing press 100 such as between the pair of chains 5.
- the material of the printing medium 1 is not particularly limited, and a material to be printed such as non-water-absorbing synthetic paper, cloth, plastic film, or plastic plate is appropriately used.
- ultraviolet curable ink is used. Since ultraviolet curable ink is used, it is possible to quickly start post-processing by irradiating with ultraviolet rays, leading to shortened delivery time.
- the ultraviolet curable ink contains an ultraviolet curable resin, a polymerization initiator, and a pigment.
- additives such as a solvent, a sensitizer, a polymerization inhibitor, an antifoaming agent, and a surfactant may be further included.
- the ultraviolet curable resin include acrylate-based, methacrylate-based, and unsaturated polyester-based resins having a polymerizable ethylenic double bond. More specifically, polyester acrylate, epoxy acrylate, urethane acrylate and the like can be mentioned.
- the polymerization initiator include benzophenone series, benzoin series, acetophenone series, and thioxanthone series.
- the temperature when using the ultraviolet curable ink is preferably 20 ° C. to 50 ° C.
- the viscosity of the ultraviolet curable ink when used is preferably 5 Pa ⁇ s to 1500 Pa ⁇ s.
- the printing unit A the printing medium 1 (cut to a predetermined length) supplied from the paper feeding unit is held by the printing unit gripper 11 on one side of the first (upstream side) impression cylinder 2.
- the pressure drum 2 is conveyed along the circumferential surface of the pressure drum 2 as the pressure drum 2 rotates.
- the blanket cylinder 3 is in contact with the impression cylinder 2
- the ultraviolet ray curable ink transferred from the plate cylinder 3 a is transferred to the printing medium 1 via the blanket cylinder 3.
- the printing body 1 is gripped by the printing unit gripper 11 provided in the adjacent impression cylinder 2, and the printing object 1 moves to the adjacent impression cylinder 2. This operation is repeated.
- the printing unit ultraviolet irradiator 22 is installed between the impression cylinders 2 inside the printing press 100, which is a position where the printing substrate 1 can be irradiated with ultraviolet rays. In the course of conveyance, the printing unit ultraviolet irradiator 22 irradiates ultraviolet rays. At this time, since the printing unit ultraviolet light receiver 22 a is attached to the predetermined printing unit gripper 11, when the printing medium 1 passes directly under the printing unit ultraviolet irradiation device 22, the printing unit ultraviolet irradiation device 22 The printing unit ultraviolet ray receiver 22a can receive the ultraviolet ray amount equivalent to the ultraviolet ray amount directly received by the light receiving unit L.
- the information on the amount of ultraviolet rays received by the printing unit ultraviolet light receiver 22a from the printing unit ultraviolet irradiator 22 is transmitted to the CPU and displayed on the display unit of the CPU.
- the ultraviolet light amount irradiated by the printing unit ultraviolet light irradiator 22 can be adjusted based on the information on the ultraviolet light amount. For example, it is possible to measure the amount of ultraviolet rays in advance by the printing unit ultraviolet ray receiver 22a during the trial operation, adjust the amount of ultraviolet rays based on the information, and perform the next main operation. Thereby, it is possible to reliably irradiate a necessary amount of ultraviolet rays at a position where the printing medium 1 actually passes.
- the ultraviolet curable ink can be temporarily cured at the stage of the printing unit A, the amount of ultraviolet irradiation to the printing body of the ultraviolet irradiator in the paper discharge unit B described later. Can be reduced. As a result, the burden on the ultraviolet irradiator in the paper discharge unit B is reduced, so that deterioration of the ultraviolet lamp can be suppressed. Further, by pre-curing, contamination due to ink transfer from the printing medium 1 to the printing machine 100 in the manufacturing process can be prevented.
- the paper discharge unit ultraviolet irradiator 21 is installed between the pair of chains 5 that are positions where the print body 1 can be irradiated with ultraviolet rays, the print body 1 is discharged during transportation.
- the paper part ultraviolet ray irradiator 21 receives ultraviolet rays.
- the paper discharge unit ultraviolet light receiver 21a is attached to the predetermined paper discharge unit gripper 12, when the printing body 1a passes directly below the paper discharge unit ultraviolet irradiator 21, the paper discharge unit ultraviolet light irradiation is performed.
- the discharge unit ultraviolet light receiver 21a can receive the ultraviolet ray amount equivalent to the ultraviolet ray amount directly received from the machine 21 by the light receiving unit L.
- the information on the amount of ultraviolet rays received by the paper discharge unit ultraviolet light receiver 21a from the paper discharge unit ultraviolet light receiver 21 is transmitted to the CPU and displayed on the display unit of the CPU, similarly to the printing unit ultraviolet light receiver 22a described above.
- the amount of ultraviolet rays irradiated by the paper discharge unit ultraviolet irradiator 21 can be adjusted based on the information on the amount of ultraviolet rays. For example, as in the case of the printing unit A described above, it is possible to measure the amount of ultraviolet rays by the discharge unit ultraviolet ray receiver 21a during a trial operation, adjust the amount of ultraviolet rays based on the information, and perform the next main operation. It is. Thereby, it is possible to reliably irradiate the necessary amount of ultraviolet rays at the position where the printed body 1a actually passes.
- the printed body 1 which is irradiated with ultraviolet rays by the paper discharge unit ultraviolet irradiation machine 21 and the ultraviolet curable ink is surely cured, is conveyed by the chain 5, and in the collection unit 7, the paper discharge unit gripper 12 removes the print body. By separating, the printed body 1a (product) is collected at a predetermined position.
- the printing unit ultraviolet light receiver 22 a can adjust the amount of ultraviolet light emitted by the printing unit ultraviolet irradiation device 22 based on the amount of ultraviolet light received from the printing unit ultraviolet irradiation device 22. In addition, based on the amount of ultraviolet light received by the paper discharge unit ultraviolet light receiver 21a from the paper discharge unit ultraviolet light irradiator 21, the amount of ultraviolet light irradiated by the paper discharge unit ultraviolet light irradiator 21 can be adjusted.
- FIG. 5 is a schematic side view showing a printing press according to the second embodiment.
- the printing machine 101 includes a printing unit A that performs printing on the printing medium 1 and a paper discharge unit B that collects the printed body 1a. Note that a paper feeding unit that supplies the printing medium 1 to the printing unit A is omitted.
- the printing unit A prints a plurality of impression cylinders 2 each having a printing unit gripper 11 that holds and guides the printing medium 1 and ultraviolet printing ink on the printing medium 1 in contact with each impression cylinder 2.
- a plate cylinder 3b as a printing body 1a, an anilox roller 31 for applying ultraviolet curable ink to the plate cylinder 3b, an ink chamber 33 for applying an ultraviolet curable ink to the anilox roller 31 and an anilox roller 31 are in contact with the extra.
- a printing apparatus comprising a doctor blade 32 for removing the applied ultraviolet curable ink, a printing unit ultraviolet light receiver (not shown) attached to the printing unit gripper 11, and a printing medium guided by the impression cylinder 2. 1 includes a printing unit ultraviolet irradiator 22 for irradiating ultraviolet rays.
- the printing machine 101 sheet-fed flexographic printing machine
- the second embodiment is different in printing apparatus from the printing machine 100 (sheet-fed offset printing machine) according to the first embodiment.
- the printing unit A ultraviolet curable ink is applied from the ink chamber 33 to the anilox roller 31. At this time, the excessively applied ultraviolet curable ink is removed by the doctor blade 32. Then, the ultraviolet curable ink applied to the anilox roller 31 is transferred to the plate cylinder 3b and printed on the printing medium 1 conveyed by the impression cylinder 2 from the plate cylinder 3b.
- the printing unit A includes a plurality of ink chambers 33, anilox rollers 31, doctor blades 32, plate cylinders 3 b, and impression cylinders 2, so that a plurality of different designs can be applied to the printing medium 1 in an overlapping manner. ing.
- a plurality of printing unit ultraviolet irradiators 22 are installed on the printing medium 1 guided by the impression cylinder 2 through an attachment frame (not shown) in the axial direction of the impression cylinder 2 at a position where ultraviolet rays can be irradiated.
- the printing unit ultraviolet irradiation machine 22 may be installed in the internal space of the printing machine 101 so as to face the impression cylinder 2.
- the ultraviolet ray curable ink is cured by irradiating the ultraviolet ray at the printing unit A, but the ultraviolet ray irradiating is not performed at the paper discharge unit B.
- the printing unit A includes a plurality of printing unit ultraviolet irradiators 22, but the paper discharge unit B does not include a paper discharge unit ultraviolet irradiator.
- the printing unit A the printing medium 1 supplied from the paper feeding unit is gripped by the printing unit gripper 11 on one side of the first (upstream) impression cylinder 2, and the pressure is changed according to the rotation of the impression cylinder 2. It is conveyed along the peripheral surface of the trunk 2. At this time, since the plate cylinder 3b is in contact with the impression cylinder 2, the ultraviolet curable ink transferred from the anilox roller 31 is printed on the printing medium 1 through the plate cylinder 3b. Then, the printing body 1 is gripped by the printing unit gripper 11 provided in the adjacent impression cylinder 2, and the printing object 1 moves to the adjacent impression cylinder 2. This operation is repeated.
- each printing unit ultraviolet irradiator 22 irradiates ultraviolet rays.
- the printing unit ultraviolet light receiver 22 a is attached to the predetermined printing unit gripper 11, the printing unit ultraviolet ray has an ultraviolet ray amount equivalent to the ultraviolet ray amount directly received from the printing unit ultraviolet irradiation machine 22 by the printing unit ultraviolet ray.
- the light receiver 22a can receive light at the light receiving portion L.
- the printing unit ultraviolet light receiver 22a may be attached to one printing unit gripper 11 or may be attached to all the printing unit grippers 11.
- Information on the amount of ultraviolet rays received by the printing unit ultraviolet ray receiver 22a from the printing unit ultraviolet ray irradiator 22 is transmitted to the CPU and displayed on the display unit of the CPU. At this time, since information on the amount of ultraviolet rays over time can be stored in the CPU, it is possible to predict the degree of deterioration of the ultraviolet irradiator, a method for adjusting the amount of ultraviolet rays, and the like by analyzing the information. Further, based on the information, the amount of ultraviolet rays irradiated by the printing unit ultraviolet irradiator 22 can be adjusted.
- the paper discharge unit gripper 12 is carried by the movement of the chain 5.
- the printed body 1 is collected at a predetermined position in the collecting unit 7 when the paper discharge unit gripper 12 releases the printed body.
- the printing unit ultraviolet light receiver 22a adjusts the amount of ultraviolet light irradiated by the printing unit ultraviolet irradiation device 22 based on the amount of ultraviolet light received from the printing unit ultraviolet irradiation device 22.
- a sufficient amount of ultraviolet rays can be reliably irradiated, and poor curing of the ultraviolet curable ink can be prevented.
- FIG. 6 is a schematic side view showing a printing press according to the third embodiment.
- the printing press 102 includes a printing unit A that performs printing on the printing medium 1 and a paper discharge unit B that collects the printed body 1a. Note that a paper feeding unit that supplies the printing medium 1 to the printing unit A is omitted.
- the printing unit A prints a plurality of impression cylinders 2 each having a printing unit gripper 11 that holds and guides the printing medium 1 and ultraviolet printing ink on the printing medium 1 in contact with each impression cylinder 2.
- a plate cylinder 3c as a printing body 1a, an ink chamber 33 for applying an ultraviolet curable ink to the plate cylinder 3c via a finisher roll 35, and an ultraviolet curable ink applied to the ink chamber 33 in contact with the ink chamber 33 are provided.
- a printing apparatus including a doctor blade 32 for removal, a printing unit ultraviolet light receiver (not shown) attached to the printing unit gripper 11, and a printing medium 1 guided by the impression cylinder 2.
- a printing unit ultraviolet irradiator 22 In order to irradiate ultraviolet rays onto a printing apparatus including a doctor blade 32 for removal, a printing unit ultraviolet light receiver (not shown) attached to the printing unit gripper 11, and a printing medium 1 guided by the impression cylinder 2.
- a printing unit ultraviolet irradiator 22 In order to ir
- the printing machine 102 (sheet-fed gravure printing machine) according to the third embodiment includes a printing machine 100 (sheet-fed offset printing machine) according to the first embodiment and a printing machine 101 (sheet-fed flexo printing machine) according to the second embodiment.
- the printing apparatus is different from that of the printing machine.
- the printing unit A ultraviolet curable ink is applied from the ink chamber 33 to the plate cylinder 3 c via the finisher roll 35. At this time, the excessively applied ultraviolet curable ink is removed by the doctor blade 32. Then, printing is performed from the plate cylinder 3 c onto the printing medium 1 conveyed by the impression cylinder 2.
- the printing unit A includes a plurality of ink chambers 33, doctor blades 32, plate cylinders 3 b, and impression cylinders 2, so that a plurality of different designs can be applied to the printing medium 1 in an overlapping manner.
- a plurality of printing unit ultraviolet irradiators 22 are installed on the printing medium 1 guided by the impression cylinder 2 through an attachment frame (not shown) in the axial direction of the impression cylinder 2 at a position where ultraviolet rays can be irradiated.
- the printing unit ultraviolet irradiation machine 22 may be installed in the internal space of the printing machine 102 so as to face the impression cylinder 2.
- the ultraviolet ray curable ink is cured by irradiating the ultraviolet ray at the printing unit A, but the ultraviolet ray irradiating is not performed at the paper discharge unit B.
- the printing unit A includes a plurality of printing unit ultraviolet irradiators 22, but the paper discharge unit B does not include a paper discharge unit ultraviolet irradiator.
- the printing unit A the printing medium 1 supplied from the paper feeding unit is gripped by the printing unit gripper 11 on one side of the first (upstream) impression cylinder 2, and the pressure is changed according to the rotation of the impression cylinder 2. It is conveyed along the peripheral surface of the trunk 2. At this time, since the plate cylinder 3c is in contact with the impression cylinder 2, ultraviolet curable ink is printed on the printing medium 1 through the plate cylinder 3c. Then, the printing body 1 is gripped by the printing unit gripper 11 provided in the adjacent impression cylinder 2, and the printing object 1 moves to the adjacent impression cylinder 2. This operation is repeated.
- the printing unit ultraviolet irradiator 22 is installed in each of the impression cylinders 2 inside the printing press 102 where the ultraviolet rays can be irradiated to the printed material 1.
- each printing unit ultraviolet irradiator 22 irradiates ultraviolet rays.
- the printing unit ultraviolet light receiver 22 a since the printing unit ultraviolet light receiver 22 a is attached to the predetermined printing unit gripper 11, the printing unit ultraviolet ray has an ultraviolet ray amount equivalent to the ultraviolet ray amount directly received from the printing unit ultraviolet irradiation machine 22 by the printing unit ultraviolet ray.
- the light receiver 22a can receive light at the light receiving portion L.
- the printing unit ultraviolet light receiver 22a may be attached to one printing unit gripper 11 or may be attached to all the printing unit grippers 11.
- Information on the amount of ultraviolet rays received by the printing unit ultraviolet ray receiver 22a from the printing unit ultraviolet ray irradiator 22 is transmitted to the CPU and displayed on the display unit of the CPU. At this time, since information on the amount of ultraviolet rays over time can be stored in the CPU, it is possible to predict the degree of deterioration of the ultraviolet irradiator, a method for adjusting the amount of ultraviolet rays, and the like by analyzing the information. Further, based on the information, the amount of ultraviolet rays irradiated by the printing unit ultraviolet irradiator 22 can be adjusted.
- the paper discharge unit gripper 12 is carried by the movement of the chain 5.
- the printed body 1 is collected at a predetermined position in the collecting unit 7 when the paper discharge unit gripper 12 releases the printed body.
- the amount of ultraviolet rays irradiated by the printing unit ultraviolet ray irradiator 22 is adjusted based on the amount of ultraviolet rays received by the printing unit ultraviolet ray receiver 22 a from the printing unit ultraviolet ray irradiator 22.
- a sufficient amount of ultraviolet rays can be reliably irradiated, and poor curing of the ultraviolet curable ink can be prevented.
- the printing press 100 in the printing press 100 according to the first embodiment, eight impression cylinders 2 and four sets of printing apparatuses are installed (see FIG. 1), but the number is not particularly limited. The same applies to the printing press 101 according to the second embodiment and the printing press 102 according to the third embodiment.
- the printing unit ultraviolet light receiver 22a is attached to the printing unit gripper 11 of the fifth impression cylinder 2 from the upstream side, and the printing unit ultraviolet irradiation device 22 is attached to the corresponding position.
- the printing unit ultraviolet light receiver 22a and the printing unit ultraviolet irradiator 22 are not necessarily essential.
- the attachment position of the printing part ultraviolet light receiver 22a and the printing part ultraviolet irradiation machine 22 is not limited, and the number of attachments may be two or more.
- the paper discharge unit UV light receiver 21a is attached to the paper discharge unit gripper 12, and the paper discharge unit UV irradiator 21 is attached to the corresponding position.
- the attachment positions of the paper discharge unit ultraviolet light receiver 21a and the paper discharge unit ultraviolet irradiator 21 are not limited, and the number of attachments may be two or more.
- the printing unit ultraviolet light receiver 22a is attached at a substantially central position of the printing unit gripper 11, and the discharge unit ultraviolet light reception is performed at a substantially central position of the paper discharge unit gripper 12.
- the container 21a is attached, the attachment position of the ultraviolet light receiver with respect to the gripper is not limited to the center.
- a plurality of ultraviolet light receivers may be attached to one gripper.
- the types of the discharge unit ultraviolet light receiver 21a and the printing unit ultraviolet light receiver 22a are not particularly limited, and commercially available ones can be used as appropriate. The same applies to the printing press 101 according to the second embodiment and the printing press 102 according to the third embodiment.
- the discharge unit ultraviolet irradiator 21 and the printing unit ultraviolet irradiator 22 are not particularly limited, and commercially available ones can be used as appropriate. Further, the adjustment of the amount of ultraviolet rays of the discharge unit ultraviolet irradiation device 21 and the printing unit ultraviolet irradiation device 22 may be performed by an operator based on the amount of ultraviolet rays displayed on the CPU display unit, and wirelessly via a computer. A robot or the like may do this.
- the printing unit gripper 11 and the paper discharge unit gripper 12 are not particularly limited, and commercially available ones can be used as appropriate. The same applies to the printing press 101 according to the second embodiment and the printing press 102 according to the third embodiment.
- the printing press 100 it is preferable to perform post-processing after obtaining the printed body 1.
- post-processing include silk screen printing, flexographic printing, roller coating, painting, and molding.
- the present invention is used as a printing machine that applies ultraviolet curable ink to a substrate. According to the printing machine of the present invention, it is possible to reliably irradiate a sufficient amount of ultraviolet rays, and to prevent poor curing of the ultraviolet curable ink.
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Abstract
Description
このため、従来は、本運転の前に繰り返し試運転を行い、紫外線硬化型インクの硬化状態を見て、熟練者の経験則に基づいて紫外線の照射量を決定する必要があった。
したがって、印刷部紫外線受光器が印刷部紫外線照射機から受光した紫外線量に基づいて、印刷部紫外線照射機により照射する紫外線量を調整し、且つ、排紙部紫外線受光器が排紙部紫外線照射機から受光した紫外線量に基づいて、排紙部紫外線照射機により照射する紫外線量を調整することにより、繰り返し試運転を行う必要が無く、本運転において、所望の量の紫外線を印刷体に照射することが可能となる。
この場合、印刷部において、紫外線硬化型インクを仮硬化させることができるので、印刷部紫外線照射機及び排紙部紫外線照射機におけるそれぞれの印刷体への紫外線の照射量を軽減することができる。その結果、紫外線照射機の負担が減るので、紫外線ランプの経時的な劣化を抑制することができる。また、仮硬化させることにより、製造過程における被印刷体からオフセット印刷機へのインク移りによる汚染も防止することができる。
また、上記(2)又は(3)に記載の印刷機を用い、排紙部紫外線受光器が排紙部紫外線照射機から受光した紫外線量に基づいて、排紙部紫外線照射機により照射する紫外線量を調整することにより、十分な量の紫外線を確実に照射することができ、紫外線硬化型インクの硬化不良を防止することができる。
また、CPUに経時的な紫外線量の情報を蓄積できるので、該情報を分析することにより、紫外線照射機の劣化具合や紫外線量の調整方法等を予測することも可能となる。
図1は、第1実施形態に係る印刷機を示す概略側面図である。
図1に示すように、印刷機100は、被印刷体1に印刷を施す印刷部Aと、印刷された印刷体1aを回収する排紙部Bとからなる。なお、被印刷体1を印刷部Aに供給する給紙部は省略する。
図2に示すように、印刷機100において、圧胴2は、円筒状となっており、中心軸を中心に回動自在となっている。
また、圧胴2の表面には、溝部4が圧胴2の軸方向に沿って形成されており、その反対側(図でいう裏側)の圧胴2の表面にも同様の溝部4が形成されている。すなわち、圧胴2の表面には対称となる位置にそれぞれ溝部4が形成されている。
ここで、印刷部グリッパー11は、被印刷体1の一端を把持可能となっている。なお、被印刷体1の他端は、把持されていない。
したがって、印刷部グリッパー11が被印刷体1を把持した状態で、圧胴2が回動することにより、被印刷体1は、圧胴2の周面に沿って搬送されるようになっている。
なお、CPUを用いるので、紫外線量の情報を蓄積することができ、これと共に印刷部紫外線照射機22における電圧、電流、印刷部紫外線照射機22のランプ温度、被印刷体1の速度等の情報を分析することにより、印刷部紫外線照射機22の劣化具合や紫外線量の調整方法等を予測することも可能となる。
すなわち、印刷部Aにおいて、被印刷体1は、各圧胴2で紫外線硬化型インクが印刷されると共に、各圧胴2の回動、及び、各圧胴2に設けられた印刷部グリッパー11によって順次、受け渡されることにより搬送される。なお、この受け渡し原理は、従来の印刷機と同じである。
図3に示すように、印刷機100において、チェーン5は、両側に設けられた枠体6に沿って移動するように、一対設けられている。
また、一対のチェーン5には、排紙部グリッパー12が架設されている。このため、排紙部グリッパー12は、チェーン5と一体となって移動するようになっている。
そして、印刷体1aが排紙部グリッパー12に把持された状態で、チェーン5が移動することにより、印刷体1aは、チェーン5の移動と共に搬送されるようになっている。
また、CPUを用いるので、紫外線量の情報を蓄積することができ、これと共に排紙部紫外線照射機21における電圧、電流、排紙部紫外線照射機21のランプ温度、被印刷体1の速度等の情報を分析することにより、排紙部紫外線照射機21の劣化具合や紫外線量の調整方法等を予測することも可能となる。
図4に示すように、印刷機100において、排紙部グリッパー12は、印刷体1aの一端を把持可能となっている。
そして、排紙部グリッパー12の略中央位置には、排紙部紫外線受光器21aが取り付けられている。
これにより、圧胴2の溝部4に収容された印刷部グリッパー11に把持された印刷体1aは、チェーン5の位置に来たときに、チェーン5に取り付けられた排紙部グリッパー12に受け渡され、チェーン5により搬送されるようになっている。なお、当該印刷部グリッパー11と、当該排紙部グリッパーとは、スムーズに印刷体1aの受け渡しができるように、対応する位置に設けられている。
ここで、排紙部紫外線照射機21は、例えば、一対のチェーン5の間等の印刷機100の内部空間に設置すればよい。
紫外線硬化型インクを用いるので、紫外線を照射することにより、速やかに後加工に取りかかることが可能であり、納期短縮にも繋がる。
紫外線硬化樹脂としては、重合可能なエチレン性二重結合を備えるアクリレート系、メタクリレート系、不飽和ポリエステル系等が挙げられる。より具体的には、ポリエステルアクリレート、エポキシアクリレート、ウレタンアクリレート等が挙げられる。
重合開始剤としては、ベンゾフェノン系、ベンゾイン系、アセトフェノン系、チオキサントン系等が挙げられる。
また、紫外線硬化型インクの使用時の粘度は、5Pa・s~1500Pa・sであることが好ましい。
紫外線硬化型インクの物性が、上記範囲内であると、排紙部紫外線照射機21及び印刷部紫外線照射機22への負担を比較的軽減させることができる。
まず、印刷部Aにおいて、給紙部から供給された被印刷体1(一定の長さに切断されている)が最初(上流側)の圧胴2の一方側の印刷部グリッパー11に把持され、当該圧胴2の回動に従って当該圧胴2の周面に沿って搬送される。
このとき、当該圧胴2には、ブランケット胴3が対接されているので、被印刷体1は、版胴3aから転写された紫外線硬化型インクがブランケット胴3を介して被印刷体1に印刷される。
そして、隣の圧胴2に設けられた印刷部グリッパー11によって、被印刷体1が把持され、被印刷体1は、隣の圧胴2に移動する。この操作が繰り返される。
このとき、所定の印刷部グリッパー11には印刷部紫外線受光器22aが取り付けられているので、被印刷体1が印刷部紫外線照射機22の直下を通過した際、当該印刷部紫外線照射機22から直接受光する紫外線量と同等の紫外線量を印刷部紫外線受光器22aがその受光部Lで受光することができる。
例えば、試運転時に前もって印刷部紫外線受光器22aにより、紫外線量を測定し、その情報に基づいて紫外線量を調整し、次の本運転を行うことが可能である。これにより、被印刷体1が実際に通過する位置における必要とする紫外線量を確実に照射することができる。
また、仮硬化させることにより、製造過程における被印刷体1から印刷機100へのインク移りによる汚染も防止することができる。
このとき、所定の排紙部グリッパー12には排紙部紫外線受光器21aが取り付けられているので、印刷体1aが排紙部紫外線照射機21の直下を通過した際、当該排紙部紫外線照射機21から直接受光する紫外線量と同等の紫外線量を排紙部紫外線受光器21aがその受光部Lで受光することができる。
例えば、前述した印刷部Aの場合と同様に、試運転時に排紙部紫外線受光器21aにより、紫外線量を測定し、その情報に基づいて紫外線量を調整し、次の本運転を行うことが可能である。これにより、印刷体1aが実際に通過する位置における必要とする紫外線量を確実に照射することができる。
これらのことから、印刷機100を用いた紫外線照射方法によれば、繰り返し試運転を行う必要が無く、十分な量の紫外線を確実に照射することができ、紫外線硬化型インクの硬化不良を防止することができる。
図5は、第2実施形態に係る印刷機を示す概略側面図である。
図5に示すように、印刷機101は、被印刷体1に印刷を施す印刷部Aと、印刷された印刷体1aを回収する排紙部Bとからなる。なお、被印刷体1を印刷部Aに供給する給紙部は省略する。
そして、アニロックスローラ31に付与された紫外線硬化型インクは、版胴3bに転写され、該版胴3bから、圧胴2によって搬送される被印刷体1に印刷される。なお、印刷部Aは、インキチャンバ33、アニロックスローラ31、ドクターブレード32、版胴3b及び圧胴2を複数備えるので、被印刷体1に異なる複数のデザインを重ねて付与することが可能となっている。
したがって、印刷機101において、印刷部Aは複数の印刷部紫外線照射機22を備えているが、排紙部Bは排紙部紫外線照射機を備えていない。
まず、印刷部Aにおいて、給紙部から供給された被印刷体1が最初(上流側)の圧胴2の一方側の印刷部グリッパー11に把持され、当該圧胴2の回動に従って当該圧胴2の周面に沿って搬送される。
このとき、当該圧胴2には、版胴3bが対接されているので、被印刷体1には、アニロックスローラ31から転写された紫外線硬化型インクが版胴3bを介して印刷される。
そして、隣の圧胴2に設けられた印刷部グリッパー11によって、被印刷体1が把持され、被印刷体1は、隣の圧胴2に移動する。この操作が繰り返される。
このとき、所定の印刷部グリッパー11には印刷部紫外線受光器22aが取り付けられているので、被印刷体1が印刷部紫外線照射機22から直接受光する紫外線量と同等の紫外線量を印刷部紫外線受光器22aがその受光部Lで受光することができる。なお、印刷部紫外線受光器22aは、1つの印刷部グリッパー11に取り付けられていてもよく、印刷部グリッパー11全てに取り付けられていてもよい。
このとき、CPUに経時的な紫外線量の情報を蓄積できるので、該情報を分析することにより、紫外線照射機の劣化具合や紫外線量の調整方法等を予測することも可能となる。
また、その情報に基づいて、印刷部紫外線照射機22により照射する紫外線量を調整することができる。
そして、印刷体1は、回収部7において、排紙部グリッパー12が印刷体を離すことにより、印刷体1a(製品)が所定の位置に回収されることになる。
図6は、第3実施形態に係る印刷機を示す概略側面図である。
図6に示すように、印刷機102は、被印刷体1に印刷を施す印刷部Aと、印刷された印刷体1aを回収する排紙部Bとからなる。なお、被印刷体1を印刷部Aに供給する給紙部は省略する。
そして、版胴3cから、圧胴2によって搬送される被印刷体1に印刷される。なお、印刷部Aは、インキチャンバ33、ドクターブレード32、版胴3b及び圧胴2を複数備えるので、被印刷体1に異なる複数のデザインを重ねて付与することが可能となっている。
したがって、印刷機102において、印刷部Aは複数の印刷部紫外線照射機22を備えているが、排紙部Bは排紙部紫外線照射機を備えていない。
まず、印刷部Aにおいて、給紙部から供給された被印刷体1が最初(上流側)の圧胴2の一方側の印刷部グリッパー11に把持され、当該圧胴2の回動に従って当該圧胴2の周面に沿って搬送される。
このとき、当該圧胴2には、版胴3cが対接されているので、被印刷体1には、紫外線硬化型インクが版胴3cを介して印刷される。
そして、隣の圧胴2に設けられた印刷部グリッパー11によって、被印刷体1が把持され、被印刷体1は、隣の圧胴2に移動する。この操作が繰り返される。
このとき、所定の印刷部グリッパー11には印刷部紫外線受光器22aが取り付けられているので、被印刷体1が印刷部紫外線照射機22から直接受光する紫外線量と同等の紫外線量を印刷部紫外線受光器22aがその受光部Lで受光することができる。なお、印刷部紫外線受光器22aは、1つの印刷部グリッパー11に取り付けられていてもよく、印刷部グリッパー11全てに取り付けられていてもよい。
このとき、CPUに経時的な紫外線量の情報を蓄積できるので、該情報を分析することにより、紫外線照射機の劣化具合や紫外線量の調整方法等を予測することも可能となる。
また、その情報に基づいて、印刷部紫外線照射機22により照射する紫外線量を調整することができる。
そして、印刷体1は、回収部7において、排紙部グリッパー12が印刷体を離すことにより、印刷体1a(製品)が所定の位置に回収されることになる。
また、印刷部紫外線受光器22a及び印刷部紫外線照射機22の取り付け位置も限定されず、取り付け数も2個以上であってもよい。
また、1つのグリッパーに対して、複数の紫外線受光器を取り付けてもよい。
また、排紙部紫外線照射機21及び印刷部紫外線照射機22の紫外線量の調整は、CPUの表示部が表示された紫外線量に基づいて、作業員が行ってもよく、コンピューターを介して無線でロボット等が行ってもよい。
後加工としては、例えば、シルクスクリーン印刷、フレキソ印刷、ローラーコート、塗装、成型等が挙げられる。
1a・・・印刷体
2・・・圧胴
3・・・ブランケット胴
3a,3b,3c・・・版胴
4・・・溝部
5・・・チェーン
7・・・回収部
11・・・印刷部グリッパー(グリッパー)
12・・・排紙部グリッパー(グリッパー)
21・・・排紙部紫外線照射機(紫外線照射機)
21a・・・排紙部紫外線受光器(紫外線受光器)
22・・・印刷部紫外線照射機(紫外線照射機)
22a・・・印刷部紫外線受光器(紫外線受光器)
31・・・アニロックスローラ
32・・・ドクターブレード
33・・・インキチャンバ
35・・・ファニッシャーロール
100,101,102・・・印刷機
A・・・印刷部
B・・・排紙部
L・・・受光部
Claims (12)
- 被印刷体を把持案内するグリッパーが取り付けられた複数の圧胴、及び、該圧胴に対接され前記被印刷体に対して紫外線硬化型インクにより印刷し印刷体とする印刷装置、を備える印刷部と、
前記印刷体を把持案内するためのグリッパーが取り付けられたチェーンを備える排紙部と、からなり、
前記印刷体に対して紫外線を照射するための紫外線照射機を備え、
前記紫外線照射機に対向するグリッパーには、前記紫外線を受光可能な印刷部紫外線受光器が取り付けられている印刷機。 - 前記印刷部が、前記圧胴に案内された前記印刷体に対して紫外線を照射するための印刷部紫外線照射機を備え、
前記印刷部のグリッパーには、前記紫外線を受光可能な印刷部紫外線受光器が取り付けられている請求項1記載の印刷機。 - 前記排紙部が、前記チェーンに案内された前記印刷体に対して紫外線を照射するための排紙部紫外線照射機を備え、
前記排紙部のグリッパーには、前記紫外線を受光可能な排紙部紫外線受光器が取り付けられている請求項1記載の印刷機。 - 前記印刷部が、前記圧胴に案内された前記印刷体に対して紫外線を照射するための印刷部紫外線照射機を備え、
前記印刷部のグリッパーには、前記紫外線を受光可能な印刷部紫外線受光器が取り付けられ、
前記排紙部が、前記チェーンに案内された前記印刷体に対し紫外線を照射するための排紙部紫外線照射機を備え、
前記排紙部のグリッパーには、前記紫外線を受光可能な排紙部紫外線受光器が取り付けられている請求項1記載の印刷機。 - 前記印刷部紫外線受光器が前記印刷部グリッパーに対して着脱自在となっている請求項2又は4に記載の印刷機。
- 前記排紙部紫外線受光器が前記排紙部グリッパーに対して着脱自在となっている請求項3又は4に記載の印刷機。
- 前記圧胴には、前記印刷部グリッパー及び前記印刷部紫外線受光器を収容可能な溝部が形成されている請求項2又は4に記載の印刷機。
- 枚葉グラビア印刷機又は枚葉フレキソ印刷機である請求項2又は4に記載の印刷機。
- 枚葉オフセット印刷機である請求項3又は4に記載の印刷機。
- 請求項2又は4に記載の印刷機を用いた印刷機の紫外線照射方法であって、
稼動中に、前記印刷部紫外線受光器が前記印刷部紫外線照射機から受光した紫外線量に基づいて、前記印刷部紫外線照射機により照射する紫外線量を調整する印刷機の紫外線照射方法。 - 請求項3又は4に記載の印刷機を用いた印刷機の紫外線照射方法であって、
稼動中に、前記排紙部紫外線受光器が前記排紙部紫外線照射機から受光した紫外線量に基づいて、前記排紙部紫外線照射機により照射する紫外線量を調整する印刷機の紫外線照射方法。 - 前記紫外線量の情報がCPUに送信され、該情報に基づいて、紫外線量の調整を行う請求項10又は11に記載の紫外線照射方法。
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