JPH11207928A - Method and apparatus for printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for printing on a matter to be printed without degrading a printing quality by eliminating a dirt of a guide roller. SOLUTION: The method for printing comprises the steps of sending a material W to be printed to printing units 3, 5 to print it, then drying it by a drying unit 15 provided vertically above the unit 5, passing it through a rotatable non-contact type guide roller 21 provided vertically above the unit 15, altering the material W horizontally, and then cooling the material W by a cooling unit 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method and an apparatus for printing a printing material by printing the printing material in a printing unit, drying the printing material in a drying unit, and cooling the printing material in a cooling unit.

[0002]

2. Description of the Related Art Conventionally, a printing apparatus 101 as shown in FIG. 3 is generally well known as a printing apparatus for printing an object to be printed. In FIG. 3, the printing apparatus 1
The printing unit 103 includes printing units 103 and 105 at appropriate intervals in the vertical direction (up and down direction).
For example, two pairs of the printing rolls 107
A, 107B; 109A, 109B; 111A, 111
B; 113A and 113B are provided.

A fixed contact type guide roller 115 or a plurality of non-contact type (air slit type) guide rollers are provided vertically above the printing unit 105.
A hot air dryer 117 as a drying unit is provided on the right side of the contact type guide roller 115 in FIG. The hot-air dryer 117 includes a hot-air generating furnace.

A smoke removing device 119 is provided on the right side of the hot air dryer 117 in FIG. Further, a cooling cylinder 121 as a cooling unit is provided on the right side of the smoke removing device 119 in FIG.

[0005] With the above arrangement, for example, a web W as a printing medium is sent to the printing unit 103, and printing is performed on both sides of the web W by two pairs of printing rolls 107A and 107B; 109A and 109B. Next, the web W is sent to the printing unit 105 and the two pairs of printing rolls 1 are printed.
Printing is performed on both sides of the web W with 11A, 111B; 113A, 113B. Therefore, printing is performed on both sides of the web W one after another.

The printed web W travels and contacts the contact type guide roller 115 to change the traveling direction from the vertical direction to the horizontal direction. The web W changed in the horizontal direction is sent to the hot air dryer 117 to perform a drying process, and then the smoke generated in the web W is removed by the smoke removing device 119. Next, the web W is sent to the cooling cylinder 121 of the cooling unit to perform a cooling process, and then travels toward a folding machine (not shown).

[0007]

In the printing apparatus 101 described above, the ink on the web W immediately after printing by the printing units 103 and 105 is not dried, and the web W is applied to the contact type guide roller 115. Since the contact guide roller 115 is changed from the vertical direction to the horizontal direction upon contact, the contact type guide roller 115 becomes dirty and the web W
Since it has a heat of about 0 ° C., the solvent contained in the web W adheres to the guide roller 115, and the surface of the running web W is scratched, so that the web W is printed. There is a problem that print quality is reduced.

When an air slit type non-contact guide roll is used, when the web W is turned 90 °, the paper width direction of the web W becomes unstable, so that a plurality of webs are required. There is a problem that becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printing method and a printing apparatus capable of eliminating stains on a guide roller and performing good printing on a printing material without deteriorating printing quality.

[0010]

According to a first aspect of the present invention, there is provided a printing method according to the first aspect of the present invention, wherein a printing medium is sent to a printing unit to perform printing, and is provided vertically above the printing unit. Drying in a drying unit, passing through a rotatable non-contact type guide roller provided vertically above the drying unit, changing the printed matter in the horizontal direction, and then cooling the printed matter in a cooling unit. Is what you do.

According to a third aspect of the present invention, there is provided a printing apparatus for printing a printing material, a drying unit provided vertically above the printing unit, and a printing unit provided vertically above the drying unit for horizontally printing the printed material. A rotatable first non-contact type guide roller for changing the direction,
And a cooling unit for cooling the printed matter passed through the first non-contact type guide roller.

Therefore, after the printing medium is sent to the printing unit and printed, the drying unit performs a drying process. The dried printed material is changed from a vertical direction to a horizontal direction by a first non-contact type guide roller, which is a non-contact type guide roller, and then subjected to a cooling process by a cooling unit.

[0013] Since the guide roller is the first non-contact type guide roller, the dried printed material runs without contacting the guide roller, so that the first non-contact type guide roller is not stained. In addition, since the surface of the printed matter is not damaged, the smoke generated on the printed matter itself is removed, and the printed matter is sent to a cooling unit while being cooled by air to be cooled. Is obtained.

According to a second aspect of the present invention, in the printing method of the first aspect, the peripheral speed of the non-contact type guide roller is set to a half or less of the running speed of the printed matter, and The rotation direction of the guide roller is the same as the running direction of the printed matter.

Therefore, the peripheral speed of the non-contact type guide roller is not more than 1/2 of the running speed of the printed matter, and the rotation direction of the non-contact type guide roller is the same as the running direction of the printed matter. Since the vehicle runs without flutter and without contacting the non-contact type guide roller, the print quality is further improved.

According to a fourth aspect of the present invention, in the printing apparatus according to the third aspect, the cooling unit comprises:
A rotatable second non-contact type guide roller is provided in the vertical direction corresponding to the drying unit and vertically above the cooling unit to change a printed material from a horizontal direction to a vertical downward direction. It is characterized by the following.

Therefore, the printing apparatus can be downsized, and the printing apparatus can be installed even if the height in the vertical direction is low.

According to a fifth aspect of the present invention, in the printing apparatus of the third and fourth aspects, the rotation direction of the first and second non-contact type guide rollers is the same as the running direction of the printed matter. Preferably, the first and second non-contact type guide rollers are provided in a non-contact state with the printing material by air force.

Therefore, the printed matter travels without contacting the first and second non-contact type guide rollers, so that the surface of the printed matter is scarcely scratched, and a good printed matter is obtained without deteriorating the print quality. .

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, a printing apparatus 1 is provided with printing units 3 and 5 at appropriate intervals in a vertical direction (up and down direction). Each printing unit 3 and 5 has, for example, two pairs of printing rolls. 7A, 7B; 9A, 9B; 11A, 11
B; 13A and 13b are provided.

A hot air dryer 15 as a drying unit is provided vertically above the printing unit 5. One end of a duct 17 is connected to the lower right portion of the hot air dryer 15 in FIG.
The other end of 7 is connected to a hot air generator 19. The hot-air generating furnace 19 may be used by being connected to another plurality of hot-air dryers. A first non-contact type guide roller 21 is rotatably provided vertically above the hot air dryer 15.

A cooling cylinder 23 as a cooling unit is provided vertically at a position corresponding to the hot air dryer 15 (a position on the right side in FIG. 3), and the first cylinder is disposed vertically above the cooling cylinder 23. A second non-contact type guide roller 25 having the same structure as the non-contact type guide roller 21 is provided.

According to the above configuration, for example, a web W as a printing medium is sent from below to the printing unit 3 and printing is performed on both sides of the web W by two pairs of printing rolls 7A, 7B; 9A, 9B. Next, the web W is sent to the printing unit 5, and the two pairs of printing rolls 11A, 11B;
Printing is performed on both sides of the web W by A and 13B.
Therefore, printing can be performed on both sides of the web W one after another.

The hot air dryer 15 has a hot air generator 1
9 is supplied through the duct 17, for example, and the web W printed by the printing units 3 and 5 is sent to the hot air dryer 15 so that the web W is dried. Will be The web W that has been subjected to the drying process is also changed by the first non-contact type guide roller 21 from the vertical direction to the horizontal direction. And the second
After the running direction of the web W is changed from the horizontal direction to the vertical direction by the non-contact type guide roller 25, the web W is cooled, for example, by passing through a cooling cylinder 23 cooled with water of about 15 ° C. Will be driven toward the aircraft.

As shown in FIG. 2, the non-contact type guide roller 21 has a cylindrical shape in which fine holes having a diameter of 10 to 30 μm are distributed all over the surface. Is supplied with air and blows out from micro holes. In addition, the non-contact type guide roller 21 can be manufactured by sintering several layers of metal mesh having a fine mesh, or by sintering powder metal by pressing and heating. Stainless steel, copper, or the like can be used as the metal material. Moreover, the first non-contact type guide roller 21
Is a rotating shaft 29 rotatably mounted on the shaft center portion.
Is rotated in the same direction as the traveling direction.

With the above structure, the dried web W is blown out of the hollow portion 27 from the surface of the first non-contact type guide roller 21.
It floats in the following conditions and travels in a non-contact state.

Therefore, since the dried web W does not come into contact with the surface of the first non-contact type guide roller 21, the first non-contact type guide roller 21 does not become dirty and the surface of the web W is not scratched. It will not stick. Therefore, the web W can be actively cooled by air without being stained. Moreover, the web W
This has the effect of also removing the smoke S that has occurred.

The first non-contact type guide roller 21 is
When the air film between the web W and the first non-contact type guide roller 21 flows, the air film between the web W and the first non-contact type guide roller 21 becomes laminar and the flapping of the web W is eliminated. , The web W having good quality can be obtained without deteriorating the print quality.

The peripheral speed of the first non-contact type guide roller 21 is about 1/2 or less of the running speed of the web W,
It is desirable that the degree be equal to or more than about. Also, the second
The structure of the non-contact type guide roller 25 is substantially the same as that of the first non-contact type guide roller 21 and has the same effect, so that the printing apparatus 1 itself can be made compact and the height in the height direction can be reduced. .

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0032]

As will be understood from the embodiments of the present invention as described above, according to the first and third aspects of the present invention, the printing medium is sent to the printing unit, where the printing is performed, and then the printing medium is sent to the drying unit. A drying process is performed. The dried printed material is changed from a vertical direction to a horizontal direction by a first non-contact type guide roller, which is a non-contact type guide roller, and then subjected to a cooling process by a cooling unit.

Since the guide roller is the first non-contact type guide roller, the dried printed material runs without contacting the guide roller, so that the first non-contact type guide roller is not stained. Also, since the surface of the printed matter is not damaged, the smoke generated on the printed matter itself is removed, and the printed matter is sent to the cooling unit while being cooled by air, and is cooled, so that a good printed matter without deteriorating the print quality. Obtainable.

According to the second aspect of the present invention, the peripheral speed of the non-contact type guide roller is １ ／ or less of the running speed of the printed matter,
Further, since the rotation direction of the non-contact type guide roller is the same direction as the traveling direction of the printed matter, there is no flapping of the printed matter,
In addition, since the vehicle runs without contacting the non-contact type guide roller, the print quality can be further improved.

According to the fourth aspect of the present invention, the printing apparatus can be made compact, and the height of the printing apparatus can be reduced and the printing apparatus can be installed.

According to the fifth aspect of the present invention, the printed matter runs without contacting the first and second non-contact type guide rollers, so that the surface of the printed matter is scarcely damaged and the print quality is deteriorated. Good printed matter can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a printing apparatus according to the present invention.

FIG. 2 is an enlarged detailed view of a first contact type guide roller.

FIG. 3 is a schematic front view of a conventional printing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing device 3, 5 Printing unit 15 Hot air dryer (drying unit) 21 1st non-contact type guide roller 23 Cooling cylinder (cooling unit) 25 2nd non-contact type guide roller W Web (substrate) S Smoke

Claims (5)

[Claims] 2. A printing method according to claim 1, wherein the printing medium is sent to a printing unit to perform printing, and then dried by a drying unit provided vertically above the printing unit, and a rotatable non-contact guide provided vertically above the drying unit. Let it pass through the rollers,
A printing method, comprising: changing a printed matter in a horizontal direction, and then cooling the printed matter by a cooling unit. 2. The method according to claim 1, wherein the peripheral speed of the non-contact type guide roller is not more than よ り of the traveling speed of the printed matter, and the rotation direction of the non-contact type guide roller is the same as the traveling direction of the printed matter. The printing method according to claim 1, wherein: 3. A printing unit for printing an object to be printed, a drying unit provided vertically above the printing unit, and a rotatable first unit provided vertically above the drying unit and changing the printed material horizontally. A printing apparatus comprising: a non-contact type guide roller; and a cooling unit that cools a printed material that has passed through the first non-contact type guide roller. 4. The cooling unit is provided in a vertical direction corresponding to the drying unit, and a rotatable second vertically vertically above the cooling unit for changing a printed material from a horizontal direction to a vertically downward direction. The printing apparatus according to claim 3, further comprising a non-contact type guide roller. 5. The first and second non-contact type guide rollers are respectively applied with an air force so that the rotation direction of the first and second non-contact type guide rollers is the same as the running direction of the printed matter. The printing apparatus according to claim 3, wherein the printing apparatus is provided in a non-contact state with the printed matter.