JPH05138863A - Printer slotter for water-soluble ultraviolet curable ink and printer slotter holder gluer - Google Patents

Abstract

PURPOSE:To achieve the increase of a production speed and a decrease in cost by applying processing finish such as grooving, ruling, bonding or lamination to a corrugated cardboard sheet immediately after printing by one process. CONSTITUTION:A printer slotter gluer has a plurality of printing units 2,3 each equipped with a water-soluble ultraviolet curable ink feeder, the ultraviolet irradiation device 4 provided behind each of the printing units 2,3 or behind the final printing unit, a slotter 5 and a gluer 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer slotter which performs scoring and grooving immediately after printing on a corrugated cardboard sheet using a water-soluble UV-curable ink, and a printer slotter to which a gluer is connected for printing. Print slotter folder gluer that enables consistent and continuous work from manufacturing to manufacturing.

[0002]

2. Description of the Related Art Printer slotters for printing corrugated cardboard sheets using glycol type ink have been known. Further, recently, a quick-drying glycol type ink has been developed, and the printing processing speed has been considerably increased.

However, the printing speed of the corrugated cardboard sheet using the glycol type ink is still slower than that of the usual gravure printing.

Further, although the printer slotter has been announced, none of the printer slotters exhibits a sufficient function.

One of the causes of these problems is that the glycol type ink has a quick-drying property as compared with the oil-based ink, but that is not enough.

Further, the surface gloss of the printing using the conventional glycol type ink is insufficient and there is a defect that the appearance is inferior to that of the oil type ink.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a printer slotter and a printer which are superior in quick-drying property as compared with glycol type ink and have a print processing mechanism which improves surface glossiness of corrugated cardboard sheet printing and can increase processing speed. The purpose is to provide slotta folder gluer.

[0008]

SUMMARY OF THE INVENTION The printer slotter of the present invention comprises one or more printing units equipped with a water-soluble UV-curable ink supply device and UV irradiation provided after each printing unit or after the final printing unit. The device and slotter are connected in series.

The printer slotter folder gluer of the present invention comprises one or a plurality of printing units equipped with a water-soluble UV-curable ink supply device, and an ultraviolet irradiation device and a slotter provided after each printing unit or after the final unit. And Glua are connected.

The water-soluble UV-curable ink used in the printer slotter and printer-slotter folder glue of the present invention contains a water-soluble UV-curable resin, water and a water-soluble solvent. Further, the ultraviolet irradiating device is provided with an ultraviolet lamp having a width shorter than the width of the object to be printed, the ultraviolet lamp being provided so as to be movable in the axial direction thereof, and the ultraviolet lamp is instructed based on a specific portion of the object to be printed. The movement, in other words, the irradiation location can be controlled. The present invention does not prevent the use of the ultraviolet lamp having the same width as the conventional one.

The ink supply device constituting the printing unit of the printer slotter or the printer slotter folder gluer of the present invention comprises an ink jetting device for jetting ink to the ink roll. The ink jetting device is movable to any position in the width direction of the ink roll.

Examples of the material to be printed in the present invention include corrugated cardboard sheet, paperboard, water repellent liner, resin coated paper, resin laminated paper and the like.

The water-soluble UV-curable resin is added for imparting high gloss and high abrasion resistance to the printing ink film and enabling instant curing. This shortens the time from printing to the end of ink drying after printing, that is, the printing processing time is shortened. In other words, the printing processing speed is increased and there is no need to wait while the printed ink dries, and immediately after printing. It can be transferred to post-processing processes such as slitting and pasting without any problems. Therefore, the in-line processing system can be adopted. Water and water-soluble solvents reduce costs,
It is also effective for smooth switching from glycol type ink and water-based flexo ink.

As the water-soluble UV-curable resin, an epoxy acrylate having a hydroxyl group, a carboxyl group, an amine salt of a carboxyl group, an ammonium salt of a carboxyl group, or an alkali metal salt of a sulfonic acid group at a side chain or a terminal,
Urethane acrylate monomers and oligomers can be used. Amine salt of carboxyl group from the viewpoint of water solubility,
Those containing an alkali metal salt of a sulfonic acid group are preferable. In order to adjust the viscosity of the ink, PO-modified trimethylolpropane triacrylate and acrylic-modified alkyd resin can be used together. The water-soluble UV-curable resin is preferably used in the ink in an amount of 10 to 40% by weight. The proportion of water used is 1 to 25% by weight in the ink.
It is preferable that

As the water-soluble solvent, methanol, ethanol, isopropyl alcohol, normal propyl alcohol, isobutanol, normal butanol, N-vinylpyrrolidone, methyl cellosolve, ethyl cellosolve and the like can be used. However, isopropyl alcohol and N-vinylpyrrolidone are preferable in terms of economy and ink film quality. The ratio of water-soluble solvent used is 1 in the ink.
It is preferably 0 to 40% by weight.

A photopolymerization initiator is used in the ink used in the printer slotter and the printer slotter folder glue of the present invention. As the photopolymerization initiator, Daito Chemical Co., Ltd. Daito Cure OB, Merck Darocur 2
959 etc. The proportion of the photopolymerization initiator used is preferably 5 to 10% by weight in the ink. As the pigment which is another constituent material, a pigment for a usual water-based ink, for example, an organic pigment such as a monoazo type, a disazo type, a quinacridone type, a dioxazine type, a naphthol type, a phthalocyanine type or an inorganic pigment such as titanium dioxide or barium sulfate. Pigments and carbon black can be used. The use ratio of the pigment is preferably 10 to 25% by weight in the ink.

[0017]

1 is a schematic side view of a printer slotter folder gluer showing an embodiment of the present invention. The printer slotter folder gluer includes a paper feeding device 1, printing units 2 and 3, an ultraviolet irradiation device 4, a slotter 5, and a gluer 6.

According to the prior art, the paper feeding device 1 is configured so that a corrugated sheet, which is a material to be printed, is fed into the paper feeding port 16 by a slider 14 that slides on the paper feeding table 12.

A corrugated cardboard sheet is fed to a feed roll (not shown) of the printing unit 2 by a roll (not shown) in the paper feeding device 1 and is placed on a guide plate (not shown) from there. The guide plate can be adjusted up and down by an eraser guide (not shown), and the plate cylinder 22 and the impression cylinder 24 can be adjusted.
The corrugated cardboard sheet, which is the material to be printed, is guided into the space.

A roll 26 in the printing unit 2 sends the corrugated board sheet to a feed roll (not shown) of the printing unit 3 to guide the corrugated board sheet between the plate cylinder 32 and the impression cylinder 34.

In this embodiment, two printing units 2, 3
However, it is possible to appropriately increase or decrease the number of printing units according to the number of colors.

The ink supplied to the ink roll by the ink jetting device (not shown) is sent to the printing plates of the plate cylinders 22 and 32 through another ink roll for kneading, and the plate cylinder 2
Printing is performed on the corrugated cardboard sheet between the second and the second impression cylinders 24 and 34.

The ink supply device constituting the printing unit of the printer slotter or the printer slotter folder glue of the present invention comprises an ink jetting device for jetting ink to the ink roll. As the ink jet device, a conventionally known type can be used, but in the present invention, since a water-soluble UV-curable ink is used instead of the conventional glycol-type ink, it is suitable for a water-soluble UV-curable ink. Ink jet nozzle is installed. Then, a method is adopted in which the ink stored in the ink tank is jetted to the ink roll by a pump.

Further, the ink supply device of the present invention can be moved to any position in the width direction of the ink roll.
In other words, the ink ejecting device stops the ink ejecting device by receiving a signal from a preset control device (not shown) while sliding on the shaft in order to eject the ink only on the portion of the corrugated board sheet that can sufficiently cover the printing area. To do.

The roll 36 in the printing unit 3 sends the corrugated board sheet to the ultraviolet irradiator 4 and guides it onto the endless belt conveyor 42.

The ultraviolet irradiation device 4 cures the ink printed on the corrugated cardboard sheet with ultraviolet energy.

For this reason, the lamp house 44 is arranged above the endless belt conveyor 42 so that the corrugated board sheet moved from the printing unit 3 is irradiated with ultraviolet rays. An ultraviolet lamp, that is, a mercury lamp or a metal halide lamp 46 is arranged in the lamp house 44,
The light from the lamp 46 is applied to the corrugated cardboard sheet on the endless belt conveyor 42.

An exhaust device is provided at the top of the ultraviolet irradiation device 4 so that the hot air inside the ultraviolet irradiation device 4 is discharged.

Mercury lamp and metal halide lamp 46
A shutter device 78 is arranged under the lamp so that the lamp house 44 can be shielded at any time.

A corrugated board sheet is fed into the slotter 5 by a feed roll (not shown) in the ultraviolet irradiation device 4. The slotter 5 has a cutter portion for grooving and marking the corrugated cardboard sheet sent from the ultraviolet irradiation device 4.

The slotter 5 may be a conventional one, but the corrugated board sheet can be adjusted up and down by an eraser guide (not shown), and the corrugated board sheet can be quickly placed in the cutter section.

The corrugated board sheet processed by the slotter 5 is transferred to the folder gluer 6.

The folder gluer 6 may be of a conventional type and has a folding device and a joining device for assembling and joining the corrugated board sheets sent from the slotter 5.

A printing and processing method using the printer slotter folder gluer of the present invention will be described below with reference to the drawings.

Corrugated cardboard sheets (not shown) stacked in the sheet feeding device 1 of FIG. 1 are introduced into the first printing unit 2 at a timely timing, and the first color is printed.

In the present invention, a water-soluble UV curable ink is used instead of the conventional glycol type ink.

The ink is stored in the tank, and the ink is jetted to the ink roll by the pump. Injecting ink may be performed uniformly on the ink roll,
The jet is applied only to a specific area of the ink roll.

That is, as in the case of other ordinary printing, the corrugated cardboard sheet does not have images of characters, pictures, etc. almost uniformly over the entire surface of the printing paper, and it often exists in a deviated manner in a specific portion. In order to speed up the printing speed, save ink, and facilitate ink roll cleaning by jetting and supplying ink only to specific parts.

The corrugated board sheet printed by the printing unit 2 is printed with the second color by the next printing unit 3. The printing mechanism is the same as that of the printing unit 2.

The two-color printed corrugated cardboard sheet is introduced into the ultraviolet irradiation device 4, and the ink is supplied with the two ultraviolet lamps 4.
UV rays from 6 cure and dry almost instantly.

The printed corrugated cardboard sheet having the printing portion cured is subsequently introduced into the slotter 5, where ruled lines and cuts are made. The corrugated cardboard sheet processed by the slotter 5 is introduced into the gluer 6 and is continuously glued and folded.

[0042]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, printing, grooving, scoring, joining, and laminating on a corrugated cardboard sheet, which is an object to be printed, are processed and finished in one step, and the object to be printed is printed. The production speed can be increased and the cost can be reduced according to the characteristics of the corrugated cardboard sheet.

[Brief description of drawings]

FIG. 1 is a schematic side view of a printer slotter folder gluer showing an embodiment of the present invention.

[Explanation of symbols]

 1 Paper Feeding Device 2, 3 Printing Unit 4 Ultraviolet Irradiation Device 5 Slotter 6 Gluer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoichi Umeya, Inventor Yoichi Umeya 4 Stock Company at 20 Seaside Town, Kishiwada City, Osaka Prefecture Umeya Manufacturing Co., Ltd. (72) Koichi Yagi 3-21 Yamada Nishi, Suita City, Osaka Prefecture (72) Inventor Teruji Asai 3-17 Yamate, Suita City, Osaka Prefecture (72) Inventor Kinhide Fujimoto 7-13-6 Nishibori, Urawa City, Saitama Prefecture (72) Inventor Yoshitsugu Nakajima 4-3-3 Aoyama, Otsu City, Shiga Prefecture

Claims (14)

[Claims] 1. A printer slotter in which one or more printing units provided with a water-soluble UV-curable ink supply device, an ultraviolet irradiation device provided after the printing unit, and a slotter are connected in series. 2. The printer slotter according to claim 1, wherein an ultraviolet irradiation device is provided after each printing unit. 3. The ink supplied to the water-soluble UV-curable ink supply device contains a water-soluble UV-curable resin, water and a water-soluble solvent, and the ink supply device ejects the ink onto an ink roll of a printing unit. Equipped with an ink jet device that
3. The printer slotter according to claim 2, wherein the ink jetting device is movable in the axial direction of the ink roll so that printing can be performed only on a specific portion of the printing medium. 4. The ultraviolet irradiation device comprises an ultraviolet lamp having a width shorter than the width of the material to be printed, the ultraviolet lamp being provided so as to be movable in the axial direction thereof, and according to an instruction based on a specific portion of the material to be printed. 4. The printer slotter according to claim 3, wherein movement of the ultraviolet lamp is controlled. 5. The printer slotter according to claim 1, wherein the ultraviolet irradiation device is provided after the last of the plurality of printing units. 6. The ink supplied to the water-soluble UV-curable ink supply device contains a water-soluble UV-curable resin, water and a water-soluble solvent, and the ink supply device ejects the ink to an ink roll of a printing unit. Equipped with an ink jet device that
6. The printer slotter according to claim 5, wherein the ink jetting device is movable in the axial direction of the ink roll so that printing can be performed only on a specific portion of the printing medium. 7. The ultraviolet irradiation device comprises an ultraviolet lamp having a width shorter than the width of the material to be printed, the ultraviolet lamp being provided so as to be movable in the axial direction thereof, according to an instruction based on a specific portion of the material to be printed. 7. The printer slotter according to claim 6, wherein movement of the ultraviolet lamp is controlled. 8. A printer comprising one or more printing units equipped with a water-soluble ultraviolet-curable ink supply device, an ultraviolet irradiation device provided after the printing unit, a slotter, and a gluer, which are connected in series. Slotter folder Gulua. 9. The printer slotter folder gluer according to claim 8, wherein an ultraviolet irradiation device is provided after each printing unit. 10. The ink supplied to the water-soluble UV-curable ink supply device contains a water-soluble UV-curable resin, water, and a water-soluble solvent, and the ink supply device ejects the ink onto an ink roll of a printing unit. 10. The printer slotter folder gluer according to claim 9, further comprising an ink ejecting device that is movable, and the ink ejecting device is movable in the axial direction of the ink roll so that printing can be performed only on a specific portion of the printing medium. 11. The ultraviolet irradiation device comprises an ultraviolet lamp having a width shorter than the width of the material to be printed, the ultraviolet lamp being provided so as to be movable in the axial direction thereof, according to an instruction based on a specific position of the material to be printed. 11. The printer slotter folder gluer according to claim 10, wherein movement of the ultraviolet lamp is controlled. 12. The print slotter folder gluer according to claim 8, wherein the ultraviolet irradiation device is provided after the last of the plurality of printing units. 13. The ink supplied to the water-soluble UV-curable ink supply device contains a water-soluble UV-curable resin, water, and a water-soluble solvent, and the ink supply device ejects the ink onto an ink roll of a printing unit. 13. The printer slotter folder gluer according to claim 12, further comprising an ink ejecting device that is movable, and the ink ejecting device is movable in the axial direction of the ink roll so that printing can be performed only on a specific portion of the printing medium. 14. The ultraviolet irradiation device comprises an ultraviolet lamp having a width shorter than the width of the material to be printed, the ultraviolet lamp being provided so as to be movable in its axial direction, and according to an instruction based on a specific portion of the material to be printed. 14. The printer slotter folder gluer according to claim 13, wherein movement of the ultraviolet lamp is controlled.