JP4262459B2 - Printer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing machine in which a plurality of plate cylinders are provided on an outer peripheral surface of an impression cylinder, and printing is performed with a plurality of plate cylinders on a substrate wound on the outer peripheral surface of the impression cylinder.
[0002]
[Prior art]
FIG. 5 is a schematic view showing a configuration of a multicolor printing machine having a common impression cylinder roll in a conventional three-color gravure system.
A multi-color printing machine 110 having a conventional common impression cylinder roll 114 includes a printing device 111, an infeed device (referred to as an IF device in the figure) 12, and an outfeed device (referred to as an OF device in the figure). 13), a paper feeding device 21, and a paper discharge device 25.
The printing apparatus 111 includes a common impression cylinder roll 114 made of a rubber roll, a three-color printing unit having plate cylinder rolls 15a to 15c provided on the outer peripheral surface of the common impression cylinder roll 114, and a common impression cylinder. Ultraviolet (UV) irradiation devices 19b to 19d provided in parallel with the printing units having plate cylinder rolls 15a to 15c on the outer peripheral surface of the roll 114 are provided as main parts.
[0003]
Each printing unit has the same configuration as normal gravure printing, and includes plate cylinders 15a to 15c, a doctor, and an inking mechanism.
When the multi-color printing machine 110 is operated, the web-like base material 22 is fed from the paper feeding device 21 and travels in the infeed device 12 while being controlled to have a constant tension by the rolls R1 to R12.
Thereafter, the web-like base material 22 is pasted on the outer peripheral surface of the common impression cylinder roll 114 by the base material sticking roll R16 via the rolls R13 to R15 in the printing apparatus 111, and the plate cylinder rolls 15a to 15c are attached. Three colors are printed by the gravure printing unit. After printing each color, the ink is cured by the ultraviolet irradiation devices 19b to 19d.
After printing, the web-like base material 22 travels while being controlled to have a constant tension by the rolls R20 to R31 in the outfeed device 13 via the base material sticking rolls R17, R18, and R19 in the printing device 111. The paper is discharged to the paper discharge device 25.
[0004]
[Problems to be solved by the invention]
However, the conventional multi-color printing machine 110 has a problem in that a lateral registration shift occurs due to the substrate 22 being meandering, contracting due to tension fluctuations or temperature differences during printing.
This lateral misregistration occurs within ± 0.1 mm, and when a normal printing product (for example, a film such as a packaging material) is manufactured using the conventional printing machine 110, there is no problem, but the color filter When manufacturing display products and the like that require high accuracy such as organic EL, registration accuracy within ± 10 μm is required.
[0005]
An object of the present invention is to provide a printing machine that can prevent a lateral misregistration with high accuracy.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a plurality of plate cylinders (15a to 15c) are provided on the outer peripheral surface of the impression cylinder (14) and wound around the outer peripheral surface of the impression cylinder. A printing machine for printing on the base material with the plurality of plate cylinders, comprising a lateral misregistration prevention means (18, 19a, 16a) for attaching and fixing the base material on the outer peripheral surface of the impression cylinder. The lateral misregistration preventing means includes an adhesive supply unit (18) that supplies an adhesive on the outer peripheral surface of the impression cylinder, and an adhesive curing unit that cures the adhesive supplied by the adhesive supply unit ( and 19a), it is formed on the outer peripheral surface of the front Symbol impression cylinder, wherein the adhesive is e Bei a groove (16a) to be filled, a printing machine, wherein.
According to a second aspect of the present invention, in the printing press according to the first aspect, the pressure-sensitive adhesive supply unit (18) supplies an ionizing radiation curable resin (17), and the pressure-sensitive adhesive curing unit (19a) A printing machine characterized by curing by irradiation with radiation.
[0010]
According to a third aspect of the present invention, in the printing machine according to the first or second aspect , the slit portion (24) that cuts the portion to be attached on which the adhesive of the base material peeled off from the impression cylinder remains. ).
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram showing the configuration of an embodiment of a printing press according to the present invention.
A printing machine 10 shown in FIG. 1 includes a printing device 11, an infeed device 12 (described as an IF device in the drawing), an outfeed device 13 (described as an OF device in the drawing), and a paper feeding device 21. And a paper discharge device 25.
[0012]
The printing apparatus 11 includes a common impression cylinder roll 14, a gravure printing unit having plate cylinder rolls 15a to 15c, a resin supply nozzle 18 as an adhesive supply section, an ultraviolet irradiation apparatus 19a as an adhesive curing section, and each color. UV irradiation devices 19b to 19d for curing the ink, rolls R13 to R15, R18, R19, a base material application roll R16 and a base material peeling roll R17, and a slit portion 24.
Further, the resin supply nozzle 18 as the adhesive supply unit and the ultraviolet irradiation device 19a as the adhesive curing unit have a lateral misregistration preventing means for adhering and fixing the substrate 22 on the outer peripheral surface of the common impression cylinder roll 14. Configure.
[0013]
The common impression cylinder roll 14 is a metal roll that presses the substrate 22 against the plate cylinder rolls 15a to 15c in order to transfer ink from the plate cylinder rolls 15a to 15c to the substrate 22.
The significance of using metal instead of rubber for the common impression cylinder roll 14 as in the prior art is as follows.
[0014]
(1) The damage caused by the ultraviolet curable resin 17 such as an adhesive is reduced.
When the ultraviolet curable resin 17 is poured between the base material 22 and the common impression cylinder roll 14, the metal is less damaged by the ultraviolet curable resin 17 than the rubber. Because it can be done.
[0015]
(2) Make the expansion and contraction of the common impression cylinder roll 14 constant.
This is because the metal can easily control the expansion and contraction of the common impression cylinder roll 14 and the base material 22 to be constant or prevented by adjusting the temperature of the common impression cylinder roll 14 as compared with rubber. .
[0016]
(3) Prevent damage from ionizing radiation.
This is because metal is less damaged by ionizing radiation than rubber.
[0017]
(4) The substrate 22 can be easily peeled off.
Compared to rubber, the metal can be easily peeled off from the common impression cylinder roll 14 after the substrate 22 is adhered to the common impression cylinder roll 14 with the cured UV curable resin 17. Because it can.
The outer peripheral surface of the common impression cylinder roll 14 will be described later with reference to FIGS.
[0018]
The gravure printing unit having the plate cylinder rolls 15a to 15c is a unit that prints on the base material 22 wound on the outer peripheral surface of the common impression cylinder roll 14, and each plate cylinder roll is similar to a normal printing unit. 15a-15c, a doctor and an inking mechanism are provided.
[0019]
Further, the common impression cylinder roll 14 and the plate cylinder rolls 15a to 15c can be individually adjusted in temperature, and each color in the roll width direction is obtained by changing the roll temperature and expanding and contracting each roll 14, 15a to 15c. Adjust the pitch between to prevent lateral misregistration.
[0020]
The significance of adjusting the temperature of the common impression cylinder roll 14 is that ultraviolet rays are irradiated particularly when the ultraviolet curable resin 17 is cured and the substrate 22 is fixed to the common impression cylinder roll 14 as in this embodiment. Thus, when the common impression cylinder roll 14 and the base material 22 expand and contract due to a temperature change due to heat, a difference occurs in the expansion and contraction amounts of the common impression cylinder roll 14 and the base material 22, thereby preventing the base material 22 from being damaged. is there. That is, even if the expansion / contraction amount of the common impression cylinder roll 14 is larger than the expansion / contraction amount of the base material 22, the temperature of the common impression cylinder roll 14 is adjusted so that the expansion / contraction amount of the common impression cylinder roll 14 matches the expansion / contraction amount of the base material 22. By doing so, the base material 22 can be prevented from being damaged.
[0021]
FIG. 6 is an explanatory diagram showing a state in which the pitch of the stripe-shaped ink applied to the plate cylinder roll changes due to a temperature change.
For example, when 100 μm stripes are engraved at 1 μm iron plate cylinder rolls 15a to 15c at a pitch of 500 μm (see FIG. 6A), when the temperature is raised by 5 ° C., this iron plate cylinder The rolls 15a to 15c extend about 50 μm, and the pitch between stripes extends about 0.025 μm (see FIG. 6B). The expansion and contraction of the pitch is adjusted according to the temperature change, and is aligned with the pitches of the other rolls to prevent the lateral register deviation.
[0022]
The significance of adjusting the temperature of the plate cylinder rolls 15a to 15c is that the plate cylinder rolls 15a to 15c can be used to print the stripe shape in the running direction of the base material 22 on the base material 22 as described above. This is performed when the plate cylinder rolls 15a to 15c are expanded or contracted due to the production of the cylinder rolls 15a to 15c or a change in temperature so that a minute shift does not occur in the pitches of the first, second and third colors. If the base material 22 is adhesively fixed to the common impression cylinder roll 14 as in the form, it is possible to more effectively prevent the lateral misregistration.
[0023]
The resin supply nozzle 18 is a nozzle that supplies an ultraviolet curable resin 17 that is an adhesive to the outer peripheral surface of the common impression cylinder roll 14. The resin supply nozzle 18 supplies the ultraviolet curable resin 17 before the base material 22 is attached, in front of the base material sticking roll R16 on the outer peripheral surface of the common pressure drum roll 14, A predetermined distance is provided from the outer peripheral surface.
[0024]
The ultraviolet irradiation device 19a is a device that cures the ultraviolet curable resin 17 supplied by the resin supply nozzle 18, is provided on the outer peripheral surface of the common impression cylinder roll 14, and is provided after the substrate sticking roll R16. .
The ultraviolet irradiation devices 19b to 19d are devices for curing the ultraviolet curable ink printed by the gravure printing unit having the plate cylinder rolls 15a to 15c.
[0025]
The base material application roll R16 is a roll for attaching the base material 22 sent from the infeed device 12 to the common impression cylinder roll 14, and is provided adjacent to the outer peripheral surface of the common impression cylinder roll 14. The substrate peeling roll R <b> 17 is a roll for peeling the substrate 22 from the common impression cylinder roll 14, and is provided adjacent to the outer peripheral surface of the common impression cylinder roll 14.
[0026]
The slit portion 24 is a roll that is provided between the roll R18 and the roll R19 and separates the remaining portion (attached portion) of the ultraviolet curable resin 17 that adheres to the base material 22.
[0027]
The infeed device 12 is a device that reduces the fluctuation in tension of the base material 22 that travels from the paper feeding device 21 to the printing device 11, and includes rolls R1 to R12 for keeping the tension constant.
[0028]
The outfeed device 13 is a device that reduces the fluctuation in tension of the base material 22 that travels from the printing device 21 to the paper discharge device 25, and includes a plurality of rolls R20 to R31 for keeping the tension constant.
[0029]
2 is a side view showing an outer peripheral surface of a common impression cylinder roll and an enlarged view showing a groove formed on the outer peripheral surface of the common impression cylinder roll in the printing machine of FIG. FIG. 3 is a view showing a situation in which the groove portion formed in the common impression cylinder roll in the printing machine of FIG. 1 is filled with an ultraviolet curable resin.
The common impression cylinder roll 14 is provided with groove portions 16a having a trapezoidal cross section at both axial ends on the outer peripheral surface. The groove portion 16 a is a groove for filling the ultraviolet curable resin 17 poured from the resin supply nozzle 18. Due to the presence of the groove 16a, the ultraviolet curable resin 17 can adhere only to the position of the groove 16a without spreading to an unnecessary range on the outer peripheral surface of the common impression cylinder roll 14.
Since the ultraviolet curable resin 17 filled in the groove 16 a is cured by the ultraviolet rays irradiated from the ultraviolet irradiation device 19, the base material 22 is fixed to the common impression cylinder roll 14.
[0030]
Next, the operation of the printing press 10 according to the present embodiment will be described.
The base material 22 is fed out from the paper feeding device 21, and the tension in the infeed device 12 is adjusted to be constant by a plurality of rolls R <b> 1 to R <b> 12 and fed into the printing device 11. The base material 22 is guided by the rolls R <b> 13 to R <b> 15 in the printing apparatus 11 and travels to the common impression cylinder roll 14.
[0031]
On the other hand, the resin supply nozzle 18 supplies the ultraviolet curable resin 17 so as to enter the groove 16 a on the outer peripheral surface of the common impression cylinder roll 14, and for this purpose, the groove 16 a is filled with the ultraviolet curable resin 17.
The base material 22 reaches the outer peripheral surface of the common impression cylinder roll 14 beyond the roll R15, and is pressed against the common impression cylinder roll 14 by the base material application roll R16. At this time, the base material 22 is wound around and adhered to the common impression cylinder roll 14 by the ultraviolet curable resin 17 filled in the groove 16a.
[0032]
Thereafter, the common impression cylinder roll 14 rotates in the A direction, and the ultraviolet irradiation device 19 a irradiates the substrate 22 with ultraviolet rays. Since the ultraviolet curable resin 17 is cured by the ultraviolet rays, the base material 22 is adhesively fixed on the outer peripheral surface of the common impression cylinder roll 14.
[0033]
The base material 22 is printed by the printing unit having the plate cylinder roll 15a while being fixed to the common impression cylinder roll 14, and the ink printed on the base material 22 is cured by the ultraviolet irradiation device 19b. Thereafter, the substrate 22 is alternately printed in the order of the printing unit having the plate cylinder roll 15b, the ultraviolet irradiation device 19c, the printing unit having the plate cylinder roll 15c, and the ultraviolet irradiation device 19d as the common impression cylinder roll 14 rotates. And ink cured. That is, it is cured by the ultraviolet irradiation devices 19b to 19d installed after printing each color. As the printing ink used in this manner, it is desirable to use an ultraviolet curable ink in order to quickly dry and print a substrate that cannot be heated.
[0034]
After the three-color printing, the base material 22 is peeled off from the common impression cylinder roll 14 by the base material peeling roll R17, and reaches the slit portion 24 via the roll R18. The remaining portion of the remaining ultraviolet curable resin 17 is cut off and sent to the outfeed device 13 via the roll R19.
[0035]
Inside the outfeed device 13, as in the above-described infeed device 12, the base material 22 is adjusted to a constant tension by the rolls R <b> 20 to R <b> 31 and wound up by the paper discharge device 25.
[0036]
According to this embodiment, since the base material is fixed on the outer peripheral surface of the impression cylinder by the lateral registration deviation prevention means, the accuracy of suppressing the lateral registration deviation increases. In this way, by completely fixing the base material to the common impression cylinder roll, the lateral misregistration can be suppressed to a small level, so display products such as color filters and organic EL that require extremely high registration accuracy, etc. High quality printing is possible.
Further, the lateral misregistration prevention means includes a resin supply nozzle 18 that supplies the ultraviolet curable resin 17 on the outer peripheral surface of the impression cylinder, and an ultraviolet irradiation device 19a that cures the ultraviolet curable resin 17 supplied by the resin supply nozzle 18. Since it can be fixed by the ultraviolet curable resin 17, an excessive force is not applied to the base material when pasting.
Furthermore, since the ultraviolet irradiation device 19a is cured by irradiating ultraviolet rays, even a base material to which heat cannot be applied can be quickly dried and pasted.
[0037]
(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
(1) FIG. 4 is a cross-sectional view showing a modification of the shape of the groove formed on the common impression cylinder roll of FIG.
In the present embodiment, the shape of the groove portion 16a of the common impression cylinder roll 14 is exemplified by the case where the cross section is a trapezoidal shape. However, the shape is not limited to this, and the semicircular groove portion 16b and the triangle shown in FIG. It can also be formed by a groove 16c having a shape.
[0038]
Moreover, although the case where the two groove parts 16a were formed on the outer peripheral surface of the common impression cylinder roll 14 was illustrated in this embodiment, it is not restricted to this, One groove part may be sufficient. Many groove portions may be used.
Furthermore, in this embodiment, although demonstrated in the example formed in the perimeter of the common impression cylinder roll 14, you may form only in a part of the common impression cylinder roll 14. FIG.
[0039]
(2) In the present embodiment, the case where the ultraviolet curable resin 17 is used as the method of fixing to the common impression cylinder roll is exemplified, but the present invention is not limited to this, and ultraviolet rays such as an electron beam (EB) ( It is also possible to fix with a resin that is cured by ionizing radiation other than (UV).
[0040]
(3) In the present embodiment, the case where the present invention is applied to a gravure printing type printing machine has been described. However, the present invention is not limited to this, and is not limited to this, but a flexographic printing method, an offset printing method, or a screen printing method. Application to printing methods is also possible.
[0041]
(4) In the present embodiment, the case where the present invention is applied to a three-color multicolor printing machine has been described. However, the present invention is not limited to this, and one color or two colors are possible, and four or more multicolor printing is possible. It is also possible to perform.
Further, in this embodiment, it is exemplified that the curing is performed by an ultraviolet irradiation device using an ultraviolet curable ink, but a normal printing ink such as a solvent ink or a water-based ink is used, and a drying device is provided between the colors. It can also be installed and printed.
[0042]
【The invention's effect】
As described above in detail, the present invention has the following effects.
(1) Since the base material is fixed on the outer peripheral surface of the impression cylinder by the lateral misregistration prevention means, the accuracy of suppressing the lateral misregistration increases.
[0043]
(2) The lateral misregistration preventing means includes an adhesive supply unit that supplies an adhesive on the outer peripheral surface of the impression cylinder, and an adhesive curing unit that cures the adhesive supplied by the adhesive supply unit. Since it can be fixed with an adhesive, an excessive force is not applied to the base material when affixing.
[0044]
(3) Since the adhesive supply unit supplies ionizing radiation curable resin and the adhesive curing unit irradiates with ionizing radiation and cures it, even if it is a base material that cannot be heated, it is quickly dried and pasted be able to.
[0045]
(4) Since the lateral misregistration preventing means is provided on the outer peripheral surface of the impression cylinder and further includes a groove portion filled with the pressure-sensitive adhesive, the pressure-sensitive adhesive is easily filled and does not protrude.
[0046]
(5) Since it further comprises a slit part for cutting the part to be adhered remaining on the base material peeled off from the impression cylinder, the unnecessary part to be adhered to the base material remaining on the base material is cut off to remove the base material. Can be commercialized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the configuration of an embodiment of a printing press according to the present invention.
2 is a side view showing an outer peripheral surface of a common impression cylinder roll in the printing machine of FIG. 1 and an enlarged view showing a groove formed on the outer peripheral surface of the common impression cylinder roll. FIG.
3 is a side view showing a state in which a groove formed in a common impression cylinder roll in the printing machine of FIG. 1 is filled with an ultraviolet curable resin. FIG.
4 is a cross-sectional view showing a modified example of the shape of a groove formed on the common impression cylinder roll of FIG. 2;
FIG. 5 is a schematic diagram showing the configuration of a conventional multicolor printing machine.
FIG. 6 is an explanatory diagram showing how the pitch of the stripe-shaped ink applied to the plate cylinder rolls 15a to 15c changes due to temperature change.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Printing machine 14 Common impression cylinder rolls 15a-15c Plate cylinder roll 18 Resin supply nozzle 19a Ultraviolet irradiation apparatus 22 Base material

Claims (3)

A printing machine provided with a plurality of plate cylinders on the outer peripheral surface of the impression cylinder, and printing on the substrate wound on the outer peripheral surface of the impression cylinder with the plurality of plate cylinders,
Side register misregistration prevention means for attaching and fixing the base material on the outer peripheral surface of the impression cylinder,
The side register preventing means is
An adhesive supply section for supplying an adhesive on the outer peripheral surface of the impression cylinder;
An adhesive curing unit that cures the adhesive supplied by the adhesive supply unit;
Formed on the outer peripheral surface of the front Symbol impression cylinder, a groove in which the adhesive is filled
That it is e Bei a,
A printing machine featuring. The printing press according to claim 1, wherein
The pressure-sensitive adhesive supply unit supplies ionizing radiation curable resin,
The adhesive curing part is cured by irradiating with ionizing radiation;
A printing machine featuring. The printing press according to claim 1 or 2 ,
Further comprising a slit part for cutting a part to be pasted on which the adhesive of the substrate peeled from the impression cylinder remains ,
A printing machine featuring.

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