JPH0930099A - Method and device for printing on ceramic plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device which can transfer a picture pattern with uniform thickness even on a surface of a plate having a rough and irregular molding or machining face, in a ceramic plate. SOLUTION: A fixed quantity of coloring material 7 such as an ink or a coating is supplied to a coating roll having high elasticity, for example, to a plate roll 1. When the coloring material 7 on the plate roll 1 is to be applied on a ceramic plate 8, the application is performed by setting the number of punched dots provided on a pressing face on the plate roll 1 to 64-900 piece/cm<2> , so that a clear printing can be obtained. Suitably, the plate roll is formed of an iron core and two-layer elastic material. Further, for keeping the coloring material uniform, a second mesh roll 5 which comes into contact with the plate roll 1 is provided.

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 apparatus for printing a pattern or the like on the surface of a ceramic board.

[0002]

2. Description of the Related Art There are various types of ceramic plate materials such as calcium silicate plate, flexible board, fiber reinforced cement plate, and foam concrete plate. These plate materials are printed with patterns and painted at the factory. In many cases, the removed material is transferred to the site and mounted on the building.For interior materials, there are plate materials with a smooth surface, and for exterior materials, there are rough surfaces. The one that has been adopted is being used. Further, in the case of such a plate material, the surface of which is coated with a resin-based paint or ink from the viewpoint of design effect and durability and has a single color tone, a means such as a flow coater, a roll coater, or a spray is used. The painted ones are the most widely used. On the other hand, in order to give a delicate pattern, a printing machine, especially a gravure offset printing machine,
Flexographic printing machines and screen printing machines are often used.
However, it is essential for these printing machines that the surface of the plate material be smooth to some extent, and printing on a plate material having a rough surface and an uneven molding surface lacks uniformity in the adhesion of the paint to the plate material. You can't get high value.

As a remedy for this, by lowering the hardness of the coating roll of the printing machine or using a sponge roll,
Although a pattern or a single color is applied to some extent, the coating amount of the coloring raw material such as ink or paint is extremely large in the convex portion and is small in the concave portion by simply changing the hardness. Therefore, the paint is not evenly attached and the sharpness of the pattern is impaired.

[0004]

SUMMARY OF THE INVENTION The problem to be solved is to provide a printing method and apparatus capable of transferring a pattern pattern to a plate material having a rough surface and an uneven molding surface or a machined surface with a uniform film thickness. The purpose is to provide.

[0005]

Means for Solving the Problems The present invention is to supply a fixed amount of a color material such as ink or paint to an elastic coating roll, and to apply the color material on the coating roll to a ceramic plate material. The number of perforated dots on the pressing surface of the coating roll is set to 64 / cm ^{2 to} 900 / cm ² for coating so that clear printing can be performed.

As an apparatus for achieving the above method, a coating roll for applying a fixed amount of color raw material such as ink or paint to a plate material, a supply means for supplying the color raw material to the coating roll, and a plate material are applied. A printing device comprising a receiving roll for sandwiching and conveying the roll with a roll, wherein the number of perforated dots on the pressing surface provided on the coating roll is 64 / cm.
It is characterized in that the number is ^{2 to} 900 pieces / cm ² .

The coating roll is a plate roll forming a pattern pattern having an uneven surface, the structure of which is composed of an iron core and two layers of elastic material, and the first layer has a hardness of 1 to 15 degrees. Is a foamed rubber material having a thickness of 10 mm to 30 mm, and the second layer has a hardness of 20 to 40 degrees and a thickness of 5 mm to 15 m.
Set to m rubber material.

Further, in order to keep the color material on the plate roll uniform, a second mesh roll is arranged in contact with the plate roll.

It is to be noted that the number of lines of the second mesh roll for uniformizing the color raw material is equal to or less than 10% of the number of lines of the mesh roll for supplying a constant amount of color raw material. I chose

The coating roll is composed of an iron core and two layers of elastic material, the first layer is a foamed rubber material having a thickness of 10 mm to 30 mm, the second layer has a thickness of 5 mm to 15 mm and a rubber hardness of 20. By setting the rubber material in the range of 40 to 40 degrees, a uniform contact pressure can be applied to the surface to be coated.

Further, when the surface to be coated has an uneven forming surface or a mechanically processed surface, the number of perforated dots of the coating roll is set to 64 / cm ^{2 to} 225 / cm ^2. A uniform coating amount can be applied, and 600 pieces / cm ^{2 to} 9 for a relatively smooth surface to be coated.
It is possible to print a delicate pattern pattern by setting the number of dots to be 00 / cm ² .

[0012]

When the printing apparatus having the above-mentioned structure is used, the plate roll is composed of two layers of rubber materials having different hardness even if the surface of the ceramic plate material has an uneven molding surface. , Good conformability to the uneven surface of the plate can be given a substantially constant pressure, and by selecting an appropriate number of dots, it is possible to make the transfer amount of the color material for the convex portion and the concave portion substantially equal. Therefore, one pattern can be transferred with the same density. Also, by making the number of dots dense, it is possible to print a delicate pattern.

No particular mention is made of the diameter and depth of the holes forming one dot, but normally when the dots have the same density, the coating amount increases as the diameter of the holes increases and the depth increases.
Further, if the diameter of the holes is made the same and the density is increased, the coating amount increases. However, if the density is determined, the size of the hole will naturally be limited, and even if the depth is too deep, the paint or ink will not transfer and will remain uncleanable. Therefore, the relationship between the two is such that when the diameter and the depth of the hole are substantially the same, the capacity of the hole is large and the transfer is easy. Further, when the number of dots is in the range of 225 to 600, more suitable printing can be performed by using as a general-purpose printing machine or coating machine.

[0014]

[Embodiment 1] FIG. 1 is a side view showing the arrangement of rolls in a printer according to an embodiment of the present invention. Reference numeral 1 is a plate roll as a coating roll, 2 is a fixed-quantity supply mesh roll for supplying a fixed amount of color raw material 7, 3 is a color raw material conveying roll, 4 is an adjusting roll for adjusting the overall amount of color raw material, and 9 is a color raw material. Is a pipe that supplies. A receiving roll 6 conveys the plate material 8 while receiving the pressure of the plate roll 1. Normally, the above-mentioned roll arrangement is used for printing, but when printing the surface of a ceramic board, the board has a width of 455 mm and a length of 303 mm.
When the standard size of 0 mm is used, the plate roll rotates more than once, which causes a change in the transfer amount of the color raw material. Although it seems that the diameter of the plate roll should be 1 m or more, a plate roll having a diameter of more than 1 m becomes extremely expensive and requires a large-scale device to be attached to and detached from the printing machine.

In the present invention, various tests were carried out to solve these problems, and as a result, it was found that printing with a constant density can be performed by rotating the second mesh roll 5 in contact with the plate roll 1 in parallel. It was Moreover, it was experimentally determined that the number of lines of the mesh roll 5 is the same as the number of lines of the mesh roll 2 or a range of the number of lines which is smaller by about 10% is extremely effective.

FIG. 2 is a sectional view showing the internal structure of the plate roll 1.
It was shown to. Reference numeral 10 is an elastic rubber sleeve layer having a pattern pattern formed on the convex surface 11, 12 is a foamed rubber layer, and 1
3 is an iron core. The average thickness of the rubber sleeve layer 10 is in the range of 5 mm to 15 mm, and a hardness of 20 to 40 degrees measured by a Shore hardness meter is suitable. The foamed rubber layer 12 has a thickness in the range of 10 mm to 30 mm, and an appropriate hardness of 1 ° to 15 ° by an Asuka sponge hardness meter. Since the rubber sleeve layer has a cylindrical shape and is detachably attached using an auxiliary device (not shown), the handle can be easily replaced.

Further, the convex surface 11 in FIG. 2 forms a pattern, and its plan view is shown in FIG. The dots 14 are substantially cylindrical holes engraved with a laser or the like, and the openings are arranged on the convex surface 11 at equal intervals, and the number of dots expresses the density by the number existing in the area of 1 cm ² . In the present invention, and good results the number of dots of 64 to 900 range, if the surfaces of the sheet is printed in an uneven shape coarse molding surface 64 / cm ² to 225 / cm ² Range shows good results, and when printing a smooth surface such as a polished surface, fine printing can be performed with a range of 625 pieces / cm ^{2 to} 900 pieces / cm ² .

The linear densities of the mesh roll 2 and the second mesh roll 5 represent the densities of narrow grooves in two intersecting directions. In the present invention, the linear density of the mesh roll 2 is 6
0 / cm to 120 / cm, but 54 / cm to 120 / c in the second mesh roll 5.
m shows a good result, and in the case of the mesh roll 5, it is 4
A practical effect was shown in the range of 0 line / cm to 120 line / cm. As a result of an experiment, it was found that there is a certain relationship between the numbers of lines of the mesh roll 2 and the second mesh roll 5. That is, if the number of lines of the second mesh roll 5 is set equal to or smaller than the number of lines of the mesh roll 2 by 10%, it is possible to print on the plate material at a uniform predetermined density. Under other conditions, the print density of the pattern changes after the first and second rotations of the plate roll, and in some cases the color raw material may flow out, resulting in a loss of image clarity.

[0019]

Example 2 FIG. 4 shows a partial cross section of the ceramic plate material 15. Width 455 mm, length 3030 mm, thickness 16 mm
In this plate material, there is a rough molding surface 16 having irregularities on the surface to be printed. The groove 17 is a machined groove processed by a router to have a width of 8 mm and a depth of 6 mm. In this embodiment, a case of printing on the uneven surface 16 will be described. The entire surface of the plate material 15 was spray coated with urethane enamel (black) and dried to form the first layer 21. Next, use a special sponge roll coater to paint the entire surface other than the groove 17 with urethane enamel in a brick color to form a second layer 22.
And The above special sponge roll coater is shown in FIG. 5 as a side view, and includes the coating roll 18 and the doctor roll 1.
9 and a receiving roll 20. Reference numeral 21 is a paint, which is urethane enamel in this embodiment. Doctor roll 1
9 and the receiving roll 20 are rolls made of steel and plated with chrome, the coating roll 18 has the following configuration. That is, the central portion was the iron core 18-1, and the first layer 18-2 was made of foamed rubber and had a thickness of 15 mm and a rubber hardness of 1 degree. Further, the second layer is covered with a rubber sleeve having a rubber hardness of 30 degrees and a thickness of 8 mm and engraved with depressions of 700 dots / cm ² . Each roll is rotated in the direction of the arrow by power. When a conventional sponge roll is used, the coating amount tends to be extremely large on the convex portion of the plate material and extremely small on the concave portion.As a practical problem, it is impossible to constantly maintain the foaming rate constant. is there. In this embodiment, since the dots are engraved, it is possible to control the coating amount to be constant. Since the coating material contained in the dots is transferred to the uneven surface of the plate material, the coating amount is uniform. Controlled. Therefore, a uniform coating film thickness can be obtained on the uneven molding surface 16, and a coating color with a small density difference can be obtained.

The number of dots of the roll coater is 625 /
A cm ^{2 to} 900 pieces / cm ² shows a good result, but this shows a preferable range, and when the number of dots is gradually reduced, the coated surface becomes a dot and can be identified. No coating film can be obtained. Also, 90
When the number is 0 / cm ² or more, the same properties as those of the conventional sponge roll are exhibited, and it becomes difficult to control the coating amount by dots.

Next, the process of printing a pattern using the printing apparatus according to the present invention will be described. The printing condition is 2
A mesh roll having a line number of 60 lines / cm was selected as the supply mesh roll of, and a mesh having a line number of 60 to 54 lines / cm was used as the second mesh roll 5. The plate roll 1 is made of foamed rubber and has a thickness of 15 mm and a hardness of 1 degree. The rubber sleeve layer made of a rubber material has a thickness of 8 mm and a hardness of 30 degrees and the number of dots is 200 / cm ^{2 to} 225 / cm ^2. Set to. In the present embodiment, when the number of dots is 300 / cm ² or more, the shade as a pattern cannot be reproduced, and the convex portion on the surface of the plate material is printed darker than the concave portion, which lowers the commercial value. Acrylic resin 20%, pigment 15
%, Butyl cellosolve 65% ink, adjust the addition amount of butyl cellosolve 12 to 13 seconds / NK # 2
The third layer 23 of the printing layer was formed by using the same as the viscosity.

[0022]

Third Embodiment Next, an example of printing on a ceramic plate material having a smooth surface will be described. When a 6 mm thick calcium silicate plate is treated with a sealer, UV-sealed and then ground with a sander to form a smooth surface, and a marble pattern is printed on a smooth enamel-coated decorative plate. The mesh shown in Fig. 1. The number of lines of the mesh of the roll 2 is set to 120 lines / cm, and the ink supply amount is kept to a small amount as compared with the above-mentioned embodiment, and the number of lines of the second mesh roll 5 is 120 lines / cm, which is the same number. Used a roll. Further, the plate roll 1 has a structure in which the foamed rubber layer 12 has a rubber hardness of 15 degrees and a thickness of 15 mm, and the rubber sleeve layer 10 made of a rubber material has a hardness of 30 degrees, a thickness of 8 mm and a dot number of 900 pieces / cm ² . A pattern was formed. An ink containing 20% of acrylic resin, 15% of pigment and 65% of butyl cellosolve was adjusted to have a viscosity of 13 seconds / NK # 2 and fed through a pipe 9 between the conveying roll 3 and the adjusting roll 4.
First, a fixed amount of ink is supplied by the supply mesh roll 2 to the plate roll 1.
And the pattern is transferred onto the calcium silicate decorative board. After that, the portion where the printing is finished comes into contact with the second mesh roll 5, which removes the excess ink on the plate roll to remove the ink.
It plays a role in making the remaining amount of the upper ink constant. Due to the action of this roll, there is no difference in the print density of the plate roll 1 after the first rotation and after the second rotation, and uniform printing can be performed on the entire plate material. As a result of testing to what extent the number of lines of the second mesh roll 5 is effective, it was found that the second mesh roll 5 worked effectively up to the same number as the number of lines of the supply mesh roll 2 or about 10% less.

[0023]

Fourth Embodiment The effect of the printing apparatus according to the present invention was proved.
In order to compare the printing using the same plate material and the same ink,
Was. First of all, in order to make the test easy
First layer is foamed rubber with a hardness of 1 degree and a thickness of 10 mm
30 mm, and the first layer has a hardness of 15 degrees and a thickness of 10 mm
Adjust the diameter of the iron core at 30 mm to obtain an outer diameter of 250
Create a mm roll. Then a cylindrical rubber sleeve
With an inner diameter of 250 mm and a rubber hardness of 20 degrees, a thickness of 5 m
m and 15 mm, rubber hardness 40, thickness 5 mm and 15 mm
64 dots / cm for each^Two Part and
225 / cm ^Two Laser engraving machine
Engraving with a rubber sleeve on the foam rubber roll
In addition, the relationship between rubber hardness and thickness specified by the present invention is covered and
I went to strike. In this case, the plate roll 1 has two outer diameters.
However, the contact pressure was adjusted by moving the receiving roll 6 shown in FIG. 1 up and down.
The ink consists of 20% acrylic resin, 15% pigment, and
Butyl cellosolve using 65% Rosolve
Add about 50% and adjust to 12 to 13 seconds / NK # 2
Used.

Next, the surface of the ceramic-based plate material has an uneven skin-like shape, and a plate having a high pitch of 5 mm and a height difference of about 2 mm is prepared, and the entire uneven surface is spray-painted with urethane enamel to form a test plate. did.

First, FIG. 6 shows an enlarged cross section of a plate material printed by using the printing apparatus according to the present invention and each type of plate roll under the above-mentioned conditions. Although a slight difference occurs depending on the rubber hardness, the thickness, and the number of dots, a uniform film thickness is formed on the convex portion. 31 is the above-mentioned ink.

FIG. 7 shows an image printed by using an ordinary gravure offset printing machine. In this case, the printing roll has a rubber hardness of 40 degrees, but since the surface is smooth, the printing is broken near the apex of the convex portion, and the film thickness cannot be provided.

FIG. 8 shows an example in which a screen printer is used. The ink passing through the screen 32 is transferred to the plate material in the convex portion, but the ink remains in the concave portion and stains the screen. Cannot print. 33 is a knife.

[0028]

As described above, in the case of a ceramic plate material, especially an exterior material called siding, the surface of the exterior material is formed as a molding surface, so that it has high designability and therefore has a surface with uneven undulations. There are many. For coating these surfaces with a single color, various coating means such as a flow coater and a spray are prepared, but in recent years, higher designability has been required. The printing apparatus of the present invention can sufficiently meet this requirement, and the plate roll has a novel roll coater and can obtain a uniform coating film thickness.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an arrangement of rolls in a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the internal structure of a plate roll.

FIG. 3 is an enlarged plan view showing a convex surface.

FIG. 4 is a cross-sectional view showing an example of a ceramics plate material manufactured by the printing method of the present invention.

FIG. 5 is a side view showing a special sponge roll coater.

FIG. 6 is an enlarged cross-sectional view showing a plate material obtained by the printing method of the present invention.

FIG. 7 is an enlarged cross-sectional view showing a plate material when printing is performed using a gravure offset printing machine.

FIG. 8 is an enlarged cross-sectional view showing a state where a plate material is printed using a screen printing machine.

[Explanation of symbols]

 1 plate roll 2 fixed amount supply roll 3 color raw material conveying roll 4 adjusting roll 5 second mesh roll 6 receiving roll 7 color raw material 8 ceramic plate material 10 rubber sleeve layer 11 convex surface 12 foam rubber layer 13 iron core 14 dot 15 ceramic plate material 16 Forming Surface 17 Groove 18 Coating Roll 20 Receiving Roll 21 First Layer 22 Second Layer

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[Procedure amendment]

[Submission date] November 20, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

[0019]

Example 2 FIG. 4 shows a partial cross section of the ceramic plate material 15. A plate material having a width of 455 mm, a length of 3030 mm, and a thickness of 16 mm has a rough molding surface 16 having irregularities on the surface to be printed. The groove 17 has a width of 8 mm and a depth of 6 depending on the router.
It is a machined groove machined to mm. Unevenness in this embodiment
The case of printing on the molding surface 16 will be described. The entire surface of the plate material 15 was spray coated with urethane enamel (black) and dried to form the first layer 21. Next, the entire surface other than the groove 17 was coated with urethane enamel in a brick color with a special sponge roll coater to form a second layer 22. The special sponge roll coater is shown in FIG. 5 as a side view.
It is composed of a doctor roll 19 and a receiving roll 20.
The first layer 21 is paint, which is urethane enamel in this embodiment. Although the doctor roll 19 and the receiving roll 20 are rolls made of steel and plated with chrome, the coating roll 18 has the following configuration. That is,
The central portion was an iron core 18-1, and the first layer 18-2 was made of a foamed rubber material having a thickness of 15 mm and a rubber hardness of 1 degree. Further, the second layer 18-3 has a rubber hardness of 30.
And the thickness is 8 mm, and it is covered with a rubber sleeve engraved with depressions of 700 dots / cm ² . Each roll is rotated in the direction of the arrow by power. When using a conventional sponge roll, the coating amount tends to be extremely large in the convex portion of the surface of the plate material and extremely small in the concave portion, and as a practical problem, maintaining a constant foaming rate is always
Impossible. In this embodiment, since the dots are engraved, it is possible to control the coating amount to be constant, and since the coating material contained in the dots is transferred to the uneven surface of the plate material, the coating amount is uniform. Controlled. Therefore, a uniform coating film thickness can be obtained on the uneven molding surface 16, and a coating color with a small density difference can be obtained.

[Procedure amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction contents]

First, FIG. 6 shows an enlarged cross-section of a plate material 30 printed by using the printing apparatus according to the present invention and each type of plate roll under the above conditions. Although a slight difference occurs depending on the rubber hardness, the thickness, and the number of dots, a uniform film thickness is formed on the convex portion. 31 is the above-mentioned ink.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

FIG. 7 shows what is printed by using an ordinary gravure offset printing machine. In this case, the printing roll has a rubber hardness of 40 degrees, but since the surface is smooth, the ink 31-1 in the vicinity of the apex of the convex portion is in a state where printing is broken and cannot have a film thickness.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

FIG. 8 shows an example using a screen printing machine, but the ink passing through the screen 32 is
The ink 31-2 migrates to the plate material at the convex portion, but the ink remains at the screen at the concave portion and stains the screen, so that it cannot be repeatedly printed. 33 is a knife.

Claims (8)

[Claims] 1. A constant amount of color material such as ink or paint is supplied to an elastic coating roll, and when the color material on the coating roll is applied to a plate material, the number of perforated dots on the pressing surface of the coating roll. Is set to 64 pieces / cm ^{2 to} 900 pieces / cm ² , and the coating is performed on the ceramic plate material. 2. A coating roll for applying a fixed amount of color raw material such as ink or paint to a plate material, a supply means for supplying the color raw material to the coating roll, and a plate material sandwiched and conveyed between the coating rolls. Is a printing device for a ceramic-type plate material, which comprises a receiving roll, and the number of perforated dots on the pressing surface provided on the coating roll is 64 / cm ^{2 to} 900 / cm ^2.
A printing device characterized by the above. 3. The coating roll is a plate roll forming a pattern pattern having an uneven surface, the structure comprising an iron core and two layers of elastic material, and the first layer has a hardness of 1 degree to 15 degrees. Is a foamed rubber material having a thickness of 10 mm to 30 mm, and the second layer has a hardness of 20 degrees to 40 degrees and a thickness of 5 mm to 15 mm.
The printing device according to claim 2, wherein the printing device is a rubber material. 4. The printing apparatus according to claim 3, wherein a second mesh roll is arranged in contact with the plate roll in order to make the color raw material uniform. 5. The number of lines of the second mesh roll for uniformizing the color raw material is equal to or less than 10% of the number of lines of the mesh roll supplying the color raw material in a fixed amount. The printing apparatus according to claim 4. 6. The coating roll comprises an iron core and two layers of elastic material, the first layer has a thickness of 10 mm to 30 mm and a rubber hardness of 1.
It is a foamed rubber material of 15 to 15 degrees, and the second layer is 5 mm thick
The printing apparatus according to claim 2, wherein the printing apparatus is a rubber material having a rubber hardness of 20 to 40 mm and a rubber hardness of 20 to 40 degrees. 7. The surface to be coated only has a concave and convex shape,
Alternatively, the printing device according to any one of claims 3 to 6, wherein the number of perforated dots of the coating roll for the plate material including the mechanically processed surface is 64 / cm ^{2 to} 225 / cm ² . 8. The number of perforated dots of a coating roll for a plate material having a smooth surface to be coated or a mechanically worked surface is 600 / cm ^{2 to} 900 / cm ^2. The printing device according to claim 1.