JPH06344537A - Method and apparatus for processing printed sheet - Google Patents

Abstract

PURPOSE:To continuously process by coating a surface of a printed matter with a UV curable resin coating (UV coating) under optimum coating conditions even if the matter has various conditions. CONSTITUTION:The method for processing a printed sheet comprises the steps of laminating a material 2 to be coated to a film 4 through UV coating in a substantially non-oxygen state except an edge of its periphery, pressing the material 2 to a metal roll 2 by a tension of the film 4 to emit UV rays to the pain through the film 4 to cure it, coating the material 2 with the coating, and applying an external force between the film 2 and an unlaminated edge of the material 2 to peel the material 2 from the film 4, thereby forming a resin film on the material 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enhances the protection and the commercial value of sheet-fed printed matter by applying a UV-curable resin coating to the sheet-fed printed matter for glossing, and matting and uneven processing. The present invention relates to a sheet-fed printed matter processing method and apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, for the surface treatment of sheet-fed printed matter or the like, a solvent or a water-based paint is applied to the printed matter, and after drying, the printed matter is bonded to a ring-shaped conveyor of a stainless specular plate with heat and pressure, and after cooling, the printed matter. Most of them are pressed by peeling off the stainless steel mirror plate to give a mirror finish to the printed matter, and print laminating by sticking a transparent or matte film to the printed matter. Both processing methods use a solvent or water, which requires a large area and a lot of heat energy, and causes many environmental problems.

Further, with a coating machine such as a roll coater, a gravure coater, a flexo coater, and a silk screen, the UV curable resin coating material is applied to the entire surface or a part of the sheet-fed printed matter, and the coating film is irradiated with ultraviolet rays to form a sheet. A method for processing a sheet-fed printed matter that gives gloss to the surface of the sheet-fed printed matter is well known.
However, in the above method, it is difficult to obtain mirror gloss like press work or print laminating process, so the distance between the coating machine and the ultraviolet irradiation machine is very long, and an infrared lamp or hot air device is placed between them to apply even a little. Methods have been taken to improve the leveling of the membrane. In this way, irradiating the coating film of the sheet-fed printed matter with infrared rays, hot air, and inefficient ultraviolet rays causes the sheet-fed printed matter to reach a high temperature. It is carried out. Even if these measures are taken, it is difficult to obtain specular gloss in reality, and since the leveling zone is lengthened, the UV curable resin coating will soak into the sheet-fed prints and the paper will be easily broken due to the high temperature. There are also drawbacks such as

In order to solve these problems, various methods have been devised in which a glass roll or a film through which ultraviolet rays are easily passed is pasted immediately after coating, is irradiated with ultraviolet rays, is cured, and is then peeled off to transfer the mirror surface state to a printed matter. (JP-A-51-558, JP-A-51-542, JP-A-55-134673, JP-B-57-2)
2755, JP-B-57-60153, JP-B-51-39662, and JP-A-56-37398).

[0005]

However, in the above-mentioned conventional example, when the ultraviolet curable resin coating material is applied to the entire surface of the sheet-fed printed matter and the layers are pasted together, the coating material is squeezed out, and therefore, the edge of the sheet-fed printed matter. The streaks of the part of (1) remain on the film or the transparent roll, and the stains are transferred to the printed matter during continuous operation. This is caused by the protrusion and depressurization of the paint at the time of bonding and the difference in the curing reaction rate of the ultraviolet curable resin paint depending on the presence or absence of oxygen. Also, if the sheet-fed printed matter is thick and heavy, if there are few parts to be applied to the sheet-fed printed matter, or if the sheet-fed printed matter has uneven habits, etc. After the leaf printed matter is attached to the film, partial peeling may occur before the irradiation with ultraviolet rays. Furthermore, when the UV curable resin coating material is applied to a sheet printed matter and laminated to a film, the less viscosity the UV curable resin coating material has, the more fluid the liquid will be, and the less sticky the particles will be. The phenomenon that the sheet-fed printed matter is easily peeled off occurs. Therefore, if the above conditions exist, the uncured UV-curable resin coating may remain on the surface of the film and the sheet printed matter, and the viscosity condition of the UV-curable resin coating should be set to the optimum condition before and after bonding. Is very difficult, the film cannot be used, and the surface processing of the sheet-fed printed matter is not good.

Therefore, the present invention has been made in view of the above circumstances, and even if the printed matter has various conditions, it is applied to the surface of the printed matter under the optimum application condition of the ultraviolet curable resin coating material and continuously processed. An object of the present invention is to provide a sheet-fed printed material processing method and an apparatus therefor capable of performing the same.

[0007]

In order to solve the above problems, a sheet-fed printed material processing method according to the present invention is directed to a surface of an object to be coated such as paper through a film made of an ultraviolet-transparent material via an ultraviolet-curing resin coating material. Is bonded in a substantially oxygen-free state so that at least the peripheral edge surface is left, and the curved body is pressed by the tension of the film, and in that state, the ultraviolet curable resin coating is irradiated with ultraviolet rays through the film. Then, the ultraviolet curable resin coating is applied to the object to be coated, and an external force is applied between the film and the unbonded edge surface of the object to peel the object to be coated from the film. The resin film is formed on

The film may be an endless film, and the curved body may be a metal roll. The sheet-fed printed matter processing apparatus of the present invention is provided with an ultraviolet curable resin coating on one surface or both of an endless film composed of a UV-transparent material and one surface of the supplied article to be coated At least an object to be coated on the endrel film with a coating portion applied with a plate such as flexo, scoon, gravure or the like so as to be smaller and a coating film of the ultraviolet curable resin coating material applied by the coating portion. A bonding portion that presses between a pressure roll and a metal roll that receives the pressure so as to leave a peripheral edge surface, and bonds in a substantially oxygen-free state, and a body to be coated on the curved surface of the metal roll, the tension of the endless film By pressing the UV-curable resin coating of the coating film in that state by irradiating it with ultraviolet rays to cure it and applying the UV-resin coating to the object to be coated, A peeling unit for peeling the object to be coated body from the endless film by applying an external force between the non-bonded edge surface of the mating of the endless film and the coated body,
And a film feeding unit that rotates the endless film on a pressure roll and a metal roll of the laminating unit via the peeling unit, and unwinds and winds the endless film. It may be used as an end film.

[0009]

According to the sheet-fed printed material processing method having the above-mentioned configuration,
The surface of the object to be coated is pressed into contact with the film via an ultraviolet curable resin paint, and is bonded in a substantially oxygen-free state so that at least the peripheral edge surface is left, and then the object to be coated is pressed onto the curved surface by the tension of the film. In that state, the UV-curable resin coating is irradiated with UV rays through the film to cure, so the UV-curable resin coating is adhered to the coated body without peeling off the coated body from the film, and the UV-curable resin coating is completely removed. After curing, the object to be coated can be easily peeled off from the film, and a resin film can be formed on the object to be coated.

When the above film is an endless film, a resin film can be continuously formed on an object to be coated such as paper. Further, when the curved body is a metal roll, the metal roll surface is unlikely to change even if it is continuously irradiated with ultraviolet rays for a long time,
An object to be coated on which a uniform resin film is formed so as to easily suppress the temperature rise is obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described in detail below with reference to the accompanying drawings showing an apparatus of the present invention. FIG. 1 is a side view showing a sheet-fed printed matter processing apparatus embodying the method of the present invention, FIG. 2 is a side view showing a state in which an ultraviolet curable resin coating material is applied to an object to be coated by the method of the present invention, and FIG. 3 is an endless film. A plan view showing a state in which objects to be coated are bonded together via an ultraviolet curable resin paint,
FIG. 4 is a side view of the same. In the figure, reference numeral 1 denotes a sheet-fed printed matter processing apparatus embodying the method of the present invention. The sheet-fed printed matter processing apparatus 1 supplies a coating object 2 such as paper.
And an ultraviolet curable resin coating material (hereinafter simply referred to as UV coating material) 5 on one or both of the supplied one surface 2a of the object to be coated 2 and the endless film 4 made of an ultraviolet light transmitting material. At least the body 2 to be coated on the endless film 4 with a coating portion 6 applied so as to be smaller than the dimension (L × W) and a coating film 7 of the UV coating material 5 applied by the coating portion 6 therebetween. The bonding surface 10 between the pressure roll 8 and the metal roll (curved surface body) 9 that receives the pressure roll so as to leave the edge surface 2b of the pressure roller 8 and to bond in a substantially oxygen-free state, and the curved surface of the metal roll 9 is coated. The body 2 is pressed by the tension of the endless film 4, and in that state, the UV coating 5 of the coating film 7 is irradiated with ultraviolet rays to be cured, and the curing portion 11 for coating the body 2 with the UV coating 5; EN A peeling section 12 for peeling the body 2 to be coated from the endless film 4 by applying an external force between the endless film 4 and the unbonded edge surface 2b of the body 2 to be coated; 10 pressure rolls 8
The main constituent elements are a film feeding unit 13 which is hung on the metal roll 9 and rotated through the peeling unit 12, and a discharge stacking unit 14 which discharges and stacks the coated object 2A which has been peeled off and whose surface processing has been completed. As

The supply unit 3 stocks the material to be coated 2 such as a sheet of paper which is multicolor printed by a sheet-fed printing machine or the like, and feeds it.
It is supplied to the coating unit 6 one by one via the paper feed conveyor 21 by means of 20, and the registering device positions the object 2 to be coated in the vertical direction and the width direction. The coating section 6 and the supply section 3 are electrically connected so that the supply section 3 supplies one coating object 2 to the coating section 6 when the flexographic plate roll 30 of the coating section 6 described in detail below makes one revolution. Mechanically or mechanically coupled.

The coating section 6 represents a flexo coating machine,
As shown in FIG. 2, a flexographic plate roll 30 for applying the UV paint 5 on the one surface 2a of the object 2 to be coated with the peripheral edge surface 2b left around, and the UV paint 5 is supplied to the flexo plate roll 30 substantially uniformly. At least a fanning roll 31 and an anilox roll 32 are provided. The UV paint 5 applied by the rolls 31 and 32 is transferred onto the flexo plate roll 30, and in the process in which the article to be coated 2 passes between the flexo plate roll 30 and the backup roll 34 which is in contact with the UV paint roll 30, as described above. One surface 2a of the object 2 to be coated has a peripheral edge surface 2b.
The coating film 7 of the UV paint 5 is formed by leaving (FIG. 2,
See 3 and 4).

Reference numeral 35 in FIG. 2 indicates a fanning roll 31.
And a pipe for supplying the UV paint 5 to the anilox roll 32, and 36 and 37 are receiving covers for preventing the UV paint 5 from dripping on other parts. Also,
The coating section 6 is a screen instead of the flexo plate roll 30,
A plate such as gravure may be used.

The laminating section 10 has a coating section 6 between the pressure roll 8 and a metal roll 9 receiving the pressure roll 8 under a predetermined pressure.
After forming the coating film 7 on the object 2 to be coated by the
The coated object 2 and the endless film 4 conveyed by 40
And the coated body 2 is attached to the endless film 4 via the coating film 7 to expose the oxygen-free state.

Then, in this state, it is sent to the curing section 11. In this curing section 11, tension is applied to the endless film 4 by the tension roll 41, so that the coating directly in contact with the metal roll 9 is applied. The body 2 is forcibly pressed down by the endless film 4, the coated body 2 is not peeled off from the endless film 4, and the above-mentioned oxygen-free state is maintained. Further, under the anoxic condition, the UV paints 5 of the coating film 7 are irradiated with ultraviolet rays through the endless film 4 by the ultraviolet irradiation devices 42, 42 to be cured, and the surface shape of the endless film 4 is transferred.

The metal roll 9 is made of hard chrome plating, and the reason is as follows. Metal roll 9
As described above, since the ultraviolet ray irradiators 42, 42 constantly receive ultraviolet rays, when it is made of rubber or resin, deterioration is rapid and the surface is roughened, and the quality of the surface processing of the article to be coated 2 such as paper is not stable. This is because it is necessary to change the rolls frequently, and further, the temperature of the metal roll 9 rises due to continuous operation, which causes an obstacle to the surface processing, so that cooling is required, and at this time, both water cooling and air cooling are easily performed.

The pressure roll 8 for the metal roll 9 is wound around the roll surface with an elastic material such as a rubber plate so that the portion in contact with the metal roll 9 has a constant width instead of a line. ing. This is necessary to bond the body 2 to be coated to the above-mentioned endless film 4 via the coating film 7 in an oxygen-free state.

The endless film 4 is an endless film formed by connecting both ends of the film, and may or may not have a seam. The endless film 4 is wound around a pressure roll 8, a metal roll 9, a tension roll 41, a peeling roll 43, and a roll group 44, which are also drive rolls that constitute the film feeding unit 13, and rotate.

As the endless film 4 made of the above-mentioned ultraviolet transparent material, a transparent film such as polypropylene, polyethylene terephthalate or nylon is usually used. The endless film 4 has various surface shapes, and the front surface is matte or mirror-finished. Although this matte front surface has a resin film formed, it has a matte state, does not become hard to see due to reflection, has a good texture, is not prone to fingerprints, dirt is not conspicuous, and even in water. Good results such as strong.

The UV irradiators 42 and 42 are usually two lights, and the number of lights is increased or decreased as needed, and the endless film 4 is adhered to the object 2 through the UV paint 5 of the coating film 7 in an oxygen-free state. The UV paint 5 is irradiated with ultraviolet rays. At this time, the UV paint 5 is instantly hardened, and the edge surface 2b around the object 2 to be coated is not coated with the UV paint 5, for example, 5 to 5.
Since it is about 10 mm, even if the endless film 4 and the object to be coated 2 are passed between the pressure roll 8 and the metal roll 9, the UV paint 5 is applied between the object to be coated 2 and the endless film 4.
Further, since the object 2 to be coated is pressed against the metal roll 9 by the tension of the endless film 4, the object 2 to be coated does not peel off from the endless film 4. Therefore, when the UV paint 5 is in an aerobic state (when the UV paint is cured by irradiating ultraviolet rays in an anoxic state,
It is generally known that the composition cures about 4 to 5 times faster than the case of irradiating ultraviolet rays in the aerobic state to cure the V-containing paint. ) Is not irradiated with ultraviolet rays, and UV of insufficient curing state on the endless film 4 surface and the coated object 2 surface
The paint 5 does not remain.

The object to be coated 2 bonded to the endless film 4 in the curing section 11 is supported by the auxiliary conveyor 45 and sent to the peeling section 12. This peeling part 12
As shown in FIG. 5, a plurality of nozzles 51 are provided on a pipe 50 installed parallel to the peeling roll 43, and the blowing directions of the plurality of nozzles 51 are set so that the peeling roll 43 and the uncoated edge surface of the object 2 to be coated are different. The external force is applied by blowing air from the pressure source connected to the pipe 50 from the nozzle 51 toward the space between the nozzles 2b and 2b. The object to be coated 2A on which the resin film, which has been peeled off from the endless film 4 and which has been subjected to the paper surface finishing, is collected by the auxiliary conveyor 45 in the discharge stacking section 14.

Next, the sheet-fed printed matter processing apparatus 1 having the above configuration
The sheet-fed printed matter processing method will be described. First, necessary maintenance is carried out, and a required number of sheets 2 to be coated, such as sheets of multi-color printed sheets by a sheet-fed printing machine, are set in the supply unit 3.

Next, the articles to be coated 2 are supplied one by one by the paper feeder 20 of the supply section 3, and the coating section 6 is supplied by the paper feed conveyor 21.
The article 2 to be coated is passed between the flexographic plate roll 30 and the backup roll 34. At this time, the UV paint 5 is supplied from the pipe 35 between the fanning roll 31 and the anilox roll 32, and UV is applied by these rolls 31 and 32.
The paint 5 is kneaded and evenly spread, and is further transferred onto the surface of the flexographic plate roll 30, and moreover, each time the flexo plate roll 30 makes one revolution, the object to be coated 2 is supplied one by one. From flexo plate roll 30 to U
The V paint 5 is transferred. In this case, the coating film 7 of the UV coating material 5 is formed on the object 2 to be coated, leaving the peripheral surface 2b on the one surface 2a. The coated object 2 on which the coating film 7 is formed is sent to the laminating section 10 by the conveyor 40, and the rotating endless film 4 is applied by the film sending section 13 and the pressure roll 8 under a predetermined pressure. Metal roll 9
By passing between the endless film 4 and UV
The objects to be coated 2 are attached one by one via the coating film 7 of the paint 5 leaving the peripheral edge surface 2b around them, and then the objects to be coated 2 are metal rolls by the tension of the endless film 4 by the tension roll 41. The UV paint 5 of the coating film 7 that is forcibly pressed against 9 and is in an oxygen-free state under this condition
Then, the UV irradiators 42, 42 irradiate UV rays through the endless film 4 to immediately cure the UV paint 5.
The coating film 7 is applied to the article 2 to be coated. Therefore, the object to be coated 2
Is thick and heavy, has some irregularities, UV paint 5
Even if the viscosity is low, the UV paint 5 is always irradiated with ultraviolet rays in an oxygen-free state. Then, while being supported by the auxiliary conveyor 45, the body 2 to be coated moves together with the endless film 4, and the endless film 4 and the unbonded edge surface 2b of the body 2 to be coated are moved from the nozzle 51 of the pipe 50 in the peeling section 12. Air can be blown between them to peel off the coating film 7 of the object 2 to be coated from the endless film 4 to obtain the object 2A to be coated on which the resin films of various processed surfaces are formed.

6 and 7 show another embodiment in which the method of the present invention is embodied. The difference between this sheet-fed printed matter processing apparatus 1a and the embodiments shown in FIGS. A coating film 7 smaller than the outer dimensions (L × W) of the article 2 to be coated is formed by the coating section 6, and then the endless film 4 is passed from the paper feeding conveyor 21 to the conveyor 40 at the laminating section 5. The objects to be coated 2 that were directly sent one by one
Is to be bonded via the coating film 7 of UV paint, leaving the peripheral surface 2b around it. Since other configurations and operations are similar to those of the embodiment shown in FIGS. 1 to 5, the same reference numerals are given to the drawings and the description thereof will be omitted.

In the above description of the embodiments, the case where the endless film is used has been explained, but the same action and effect can be obtained even when the endless film of unwinding and winding is used instead of this endless film. be able to.

[0027]

As described in detail above, according to the method for processing sheet-fed printed matter of the present invention, one surface of the object to be coated is pressed against the film via the ultraviolet curable resin coating material and at least the peripheral edge surface is left. After bonding in a substantially oxygen-free state as described above, the object to be coated is pressed against the curved surface by the tension of the film, and in that state the ultraviolet curing resin paint is irradiated with ultraviolet rays through the film to cure, so that the film to be coated After the ultraviolet curable resin coating material is applied to the object to be coated without being peeled off and the ultraviolet curable resin coating material is completely cured, the object to be coated can be easily peeled off from the film and a resin film can be formed on the object to be coated. Therefore, even if the object to be coated such as a printed matter has various conditions such as thick and heavy, a small number of parts to be applied, and unevenness, the object to be coated is further coated under the best application condition of the ultraviolet curable resin paint. Even when applied to the body, the object to be coated does not peel off from the film, and the surface of the object to be coated can be continuously processed.

When the above film is an endless film, a resin film can be continuously formed on an object to be coated such as paper. Therefore, it is almost unnecessary to replace the film, and the surface processing of a large amount of sheet-fed printed matter can be continuously performed.

Further, when the curved body is a metal roll, the surface of the metal roll is unlikely to change even if it is continuously irradiated with ultraviolet rays for a long period of time, and the temperature rise is easily suppressed to obtain a coated object on which a uniform resin film is formed. Therefore, there is almost no need to replace the rolls, and there is an effect that it is possible to always obtain a coated object on which a surface-treated resin film is formed.

[Brief description of drawings]

FIG. 1 is a side view showing a sheet-fed printed matter processing apparatus embodying the method of the present invention.

FIG. 2 is a side view showing a state in which an ultraviolet curable resin coating material is applied to an object to be coated by the method of the present invention.

FIG. 3 is a plan view showing a state in which an object to be coated is bonded to an endless film via an ultraviolet curable resin coating material by the method of the present invention.

FIG. 4 is a side view showing a state in which an object to be coated is bonded to an endless film via an ultraviolet curable resin coating material by the method of the present invention.

FIG. 5 is a side view showing a detailed portion of a peeling portion.

FIG. 6 is a side view similar to FIG. 1 showing another embodiment.

FIG. 7 is a side view similar to FIG. 2 showing another embodiment.

[Explanation of symbols]

1, 1a Sheet-fed printed material processing apparatus 2, 2A Coating object 2a One surface 2b Edge surface 4 Endless film (film) 5 UV curable resin paint 6 Coating part 7 Coating film 8 Pressure roll 9 Metal roll 10 Laminating part 11 Curing part 12 Peeling section 13 Film feeding section

Claims (5)

[Claims] 1. A curved body formed by laminating a surface of an object to be coated, such as paper, on a film made of an ultraviolet-transparent material in a substantially oxygen-free state so as to leave at least a peripheral edge surface around the object to be coated with an ultraviolet curable resin coating material. The object to be coated is pressed down by the tension of the film, and in that state, the ultraviolet curable resin coating material is irradiated with ultraviolet rays to be cured, and the ultraviolet curable resin coating material is adhered to the object to be coated, and the film and the substrate are coated. A method for processing a sheet-fed printed product, which comprises applying an external force between an unbonded edge surface of a coated body and peeling the coated body from the film to form a resin film on the coated body. 2. The method for processing sheet-fed printed matter according to claim 1, wherein the film is an endless film. 3. The curved body is a metal roll.
Alternatively, the method for processing a sheet-fed printed matter according to 2. 4. A UV-curable resin coating is provided on one surface or both of an endless film made of a UV-transmissive material and one surface of an object to be coated, such as paper, which is smaller than the outer dimension of the object to be coated. Flexo, screen, a coating portion to be applied with a plate such as gravure, and the coating film of the ultraviolet-curing resin coating applied by the coating portion is interposed between the endrel film and at least the peripheral edge surface of the object to be coated. A bonding portion that presses between a pressure roll and a metal roll that receives it so that it is bonded in a substantially oxygen-free state, and the object to be coated is pressed against the curved surface of the metal roll by the tension of the endless film and the state thereof With a curing portion for irradiating the ultraviolet curable resin coating material of the coating film with ultraviolet rays to cure the ultraviolet curable resin coating material and applying the ultraviolet resin coating material to the object to be coated,
A peeling section for peeling the body to be coated from the endless film by applying an external force between the endless film and the unbonded edge surface of the body to be coated, and a pressure roll and a metal for the laminating section of the endless film. A sheet-fed printed matter processing apparatus comprising: a film feeding unit that is wound on a roll and rotated via the peeling unit. 5. The sheet-fed printed matter processing apparatus according to claim 4, wherein the endless film is an unwinding and winding end film.