JPH06135121A - Printing method - Google Patents

Abstract

PURPOSE:To obtain a method for forming a sufficiently-thick printing film without an occurrence of misregistration. CONSTITUTION:In a printing method, an original printing plate 5 and an object to be printed 6 are juxtaposed, a pad 9 is brought into contact with both the original printing plate 5 and the object to be printed 6 in order, and the characters or graphics of the original printing plate 5 are transferred to the object to be printed 6. The pad 9 is firstly brought into contact with the original printing plate 5 coated with ink to suck the ink. The pad 9 is lifted and moved to a position above the object to be printed 6, succeedingly being returned again to a position above the original printing plate 5 without being lowered. The pad 9 is lowered to come into contact with the original printing plate 5 to again suck the ink, succeedingly being lifted, moved to the position above the object to be printed 6, and lowered intact to be strongly pressed on the object to be printed 6 to make printing thereon. Therefore, the two ink sucking actions ensure a sufficient film thickness though an ink transfer action to the object to be printed 6 is conducted once.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method applicable to tampo printing, pad printing or tacho printing.

[0002]

2. Description of the Related Art In tampo printing, pad printing or tacho printing, a printing method called "double printing" is sometimes performed in order to increase the film thickness of ink formed on a printing material. . In this printing method, the printing original plate and the printing material are arranged side by side, and the characters or figures of the printing original plate are transferred to the printing material by sequentially contacting a tampo or a pad with both the printing original plate and the printing material. The above work is repeated twice. As a result, the ink adheres to the printing material twice, and the film thickness of the ink increases.

The double printing conventionally performed by tampo printing will be described with reference to the drawings. In FIG. 2, reference numeral 1 is a printing machine, which is composed of a lower base 2, an upright portion 3, and an upper base 4,
The shape seen from the side is U-shaped. An original printing plate 5 and an object 6 to be printed are arranged side by side on a lower base 2 of the printing machine 1, and are fixed by a fixing means (not shown). Reference numeral 7 is a blade called a doctor, which scrapes off unnecessary ink covering the printing original plate 5, and 8 is a plate called a chupachella for covering the printing original plate 5 with ink.

A tampo 9 is provided on the upper base 4 of the printing press 1. This tampo 9 has both appropriate hygroscopicity and elasticity, and is pressed against the printing original plate 5 to adsorb the ink applied to the printing original plate 5 as described later,
Next, printing is performed by being pressed against the printing material 6 and transferring the ink to the printing material 6. As described above, since the tampo 9 comes into contact with both the printing original plate 5 and the printing target 6, the mechanism provided inside the upper base 4
The upper base 4 can move in the longitudinal direction (horizontal direction) as well as in the height direction of the standing portion 3 (vertical direction).

A conventional printing method using the printing press 1 having such a configuration is performed in the order shown in FIG. The spatula 8 is not shown in these figures. First, in the doctor ring A, the tampo 9 located near the tip of the upper table 4 and in the raised position moves toward the printing original plate 5 as shown by the arrow. Next, in the step indicated by B, the tampo 9 that has reached above the printing original plate 5 descends onto the printing original plate 5 and comes into pressure contact with the printing original plate 5. In this way, the tampo 9 which has adsorbed the ink from the printing original plate 5 rises in the step C and moves to the printing position in the subsequent step D.

By the step E, the tampo 9 descends, and the first printing is performed in which the ink is transferred to the material 6 to be printed. The doctor ring means that when the character design is etched on the printing original plate 5, the spatula 8 that scrapes out the ink supplies the ink to the printing original plate 5 and the doctor 7 scrapes off the ink other than the etched part. , A series of operations that leave ink only in the etched portion.

[0007] The tampo 9 for which the first printing has been completed rises at that position in the step F and moves toward the printing original plate 5 in the step of the doctor ring G. Hereinafter, steps H to L are exactly the same as steps A to F, and the second printing is performed in step K. That is, in this printing method,
The tampo 8 reciprocates twice between the same printing original plate 5 and the printing material 6 to perform printing twice on the printing material 6.
By performing the overlapping printing twice in this way, a predetermined film thickness is formed on the printing medium 6, but the second printing position may be slightly deviated from the first printing position. .

In the past tampo printing, the film thickness obtained by one printing was 3 to 4 μm. Since the film thickness is so thin, it was not possible to sufficiently hide the background color of the printing material. In order to perform sufficient concealment, a film thickness that is at least twice this thickness is required. In silk screen printing, it is possible to obtain a film thickness that usually sufficiently hides a background color, and the evaluation when the color tone is compared with that of tampo printing is higher than that of tampo printing. However, the biggest drawback of silk screen printing is that printing on a cubic surface is not possible.

[0009]

Therefore, it is attempted to perform printing with a large film thickness by a printing method such as tampo printing or pad printing, and tacho printing instead of silk screen printing. As this method, in the case of tampo printing, double printing is performed in which the ink is transferred twice on the printing material side by the tampo, but in this case, the ink is displaced as described above, so-called "character blurring" occurs. It will end up.

The present invention has been made in view of this point. Instead of performing overprinting on the printed material side to obtain a predetermined film thickness, the transfer material side secures the film thickness and transfers it to the printed material. It is intended to provide a method.

[0011]

According to the present invention, as a means for solving the above-mentioned problems, a printing original plate and a printing material are arranged side by side, and a tampo or pad is brought into contact with both the printing original plate and the printing material sequentially. In the printing method of transferring the characters or figures of the printing original plate to the printing substrate by the above, the tampo or pad is first brought into contact with the printing original plate coated with ink to adsorb the ink, and then this is raised to raise the printing object. Move it to the upper side, without lowering it, then return it to the upper side of the printing original plate again to lower it, contact the printing original plate to re-adsorb ink, and then raise it to move it to the upper side of the printing material and lower it as it is. The printing method is characterized in that printing is performed by strongly pressing the printing target.

[0012]

According to such a printing method, the ink is adsorbed to the tampo or the pad twice, so that the amount is sufficient. Then, by transferring this sufficient amount of ink to the printing material, a sufficient film thickness is formed on the printing material.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A printing method according to the present invention will be described below with reference to FIG. First, in the doctor ring A, the tampo 8 which is located near the tip of the upper table 4 and is in the raised position moves toward the printing original plate 5 as shown by the arrow. Next, in the step B, the tampo 9 that has reached above the printing original plate 5 is the printing original plate 5
The first lowering is performed and the printing original plate 5 is pressed. In this way, the tampo 9 which has adsorbed the ink from the printing original plate 5 rises in the step C and moves to the printing position in the subsequent step D. The tampo 9 performs doctoring in the G process without descending here and moves toward the printing original plate 5.

After the doctor ring is completed, the tampo 9 descends on the printing original plate 5 for the second time in the step H and comes into pressure contact with the printing original plate 5. In this way, the tampo 9 that has picked up the ink from the printing original plate 5 moves up in the process I and moves to the printing position in the process J. The tampo 9 enters the step K here, and the printing is performed by being strongly pressed against the printing material 6.
After the printing is completed, the tampo 9 rises and ends at that position in the process of L.

As described above, in the printing method according to the present invention, the ink adsorption is performed twice, but the transfer to the printing material 6 is performed only once. In this case, since the ink for two times is adsorbed to the tampo 9, it is possible to obtain a film thickness which is comparable to the conventional two times by performing the printing by press-contacting the object 6 strongly. Tampo printing was done on the block gauge and the film thickness was measured with a dial gauge. As a result, the film thickness which was 3 to 5 microns by the conventional printing method becomes 8 to 10 microns. Has been confirmed by experiments.

Although the present invention is applied to tampo printing as described above, the printing method of the present invention is not limited to this, and other printing methods such as pad printing or octopus printing can be used. Can also be applied.

[0017]

Since the present invention is a printing method configured as described above, so-called "character blurring" that often occurs in the conventional double printing does not occur. This improves productivity and simplifies the jig for fixing the printed material. Since the film thickness can be increased by one transfer, color matching during ink color matching becomes easy.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating an order of a printing method according to the present invention.

FIG. 2 is a side view of a printing machine used for implementing the present invention.

FIG. 3 is an explanatory diagram illustrating a conventional order of double printing.

[Explanation of symbols]

 1 Printing press 5 Printing original plate 6 Printed material 9 Tampo

[Procedure amendment]

[Submission date] December 3, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of printing method

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method applicable to tampon printing .

[0002]

2. Description of the Related Art Tampon printing (pad printing or octopus printing )
(Also referred to as printing) , in order to increase the film thickness of the ink formed on the printing object, a printing method called so-called “double printing” may be performed. In this printing method, the printing original plate and the material to be printed are placed side by side and the tampon
In the printing method in which the characters or figures of the printing original plate are transferred to the printing target plate by sequentially contacting the printing plate and the printing target plate with each other, the same work is repeated twice. As a result, the ink adheres to the printing material twice, and the film thickness of the ink increases.

2 which was conventionally performed by tampon printing
Degree printing will be described with reference to the drawings. In FIG. 2, reference numeral 1 denotes a printing machine, which is composed of a lower base 2, a standing portion 3 and an upper base 4, and has a U-shaped shape when viewed from the side. An original printing plate 5 and an object 6 to be printed are arranged side by side on a lower base 2 of the printing machine 1, and are fixed by a fixing means (not shown). Reference numeral 7 denotes a blade called a doctor, which scrapes off unnecessary ink covering the printing original plate 5, and 8 denotes a plate called a spatula for covering the printing original plate 5 with ink.

A tampon 9 is provided on the upper table 4 of the printing press 1. The tampon 9 has both appropriate hygroscopicity and elasticity, and is pressed against the printing original plate 5 to adsorb the ink applied to the printing original plate 5 and then pressed against the printing substrate 6 as will be described later. Printing is performed by transferring the ink to the printing object 6. Since the tampon 9 is in contact with both the printing original plate 5 and the material 6 to be printed in this way, the tampon 9 is provided in the upper base 4 by a mechanism provided inside the upper base 4 in the longitudinal direction (horizontal direction) and the height of the upright portion 3. It can move in the direction (vertical direction).

A conventional printing method using the printing press 1 having such a configuration is performed in the order shown in FIG. The spatula 8 is not shown in these figures. First, in the doctor ring A, the tampon 9, which was located near the tip of the upper table 4 and was in the raised position, moves toward the printing original plate 5 as shown by the arrow. Next, in the step indicated by B, the tampon 9 that has reached above the printing original plate 5 descends onto the printing original plate 5 and comes into pressure contact with the printing original plate 5. In this way, the tampon 9 that has adsorbed the ink from the printing original plate 5 rises in the step C and moves to the printing position in the subsequent step D.

By the step E, the tampon 9 descends, and the first printing is performed in which the ink is transferred to the material 6 to be printed.
In addition, the doctor ring is a printing original 5
If it is etched, the scan was scraped ink
The patcher 8 supplies ink to the printing original plate 5, and the doctor 7
Refers to a series of operations in which ink other than the etched portion is scraped off and ink is left only in the etched portion.

The tampon 9 that has undergone the first printing is F
In the step of G and the doctor ring, it moves in the direction of the printing original plate 5 by the step of. Hereinafter, steps H to L are exactly the same as steps A to F, and the second printing is performed in step K. That is, in this printing method, the tampon 8 reciprocates twice between the same printing original plate 5 and the printing material 6 to print on the printing material 6 twice. By performing the double-layer printing twice in this way, a predetermined film thickness is formed on the printing object 6.
The print position of the first time may be slightly deviated from the print position of the first time.

In the past tampon printing, the film thickness obtained by one printing was 3 to 4 μm. Since the film thickness is so thin, it was not possible to sufficiently hide the background color of the printing material. To do enough hiding,
It is necessary to have a film thickness that is at least twice this. In silk screen printing, usually it is possible to obtain a film thickness sufficiently hide the base color, evaluation of the case where the color tone was compared with tampon printing is higher than the tampon printing. However, the biggest drawback of silk screen printing is that printing on a cubic surface is not possible.

[0009]

Therefore, tampon printing (pad printing, octopus printing) is performed without using silk screen printing.
The printing method of (printing ) attempts to perform thick printing. As this method, in the case of tampon printing, two-time printing is performed in which the ink is transferred twice on the printed material side by the tampon , but in this case, the so-called " print misalignment " occurs, as described above. It will end up.

The present invention has been made in view of this point. Instead of performing overprinting on the printed material side to obtain a predetermined film thickness, the transfer material side secures the film thickness and transfers it to the printed material. It is intended to provide a method.

[0011]

As a means for solving the above problems, the present invention provides a printing original plate and an object to be printed side by side, and a tampon is sequentially contacted with both the original plate and the object to be printed. In a printing method for transferring a letter or a graphic of an original plate onto a printing material, the tampon is
First, contact the printing base plate coated with ink to adsorb the ink, then raise it to move it above the substrate to be printed, without lowering it, then return it back to above the printing base plate and lower it. The printing method is characterized in that the ink is re-adsorbed by contacting with the substrate, then raised and moved to the upper side of the substrate to be printed, and then lowered to press the substrate strongly to perform printing. .

[0012]

According to such a printing method, the tampon has two
Since the ink is adsorbed over time, the amount is sufficient. Then, by transferring this sufficient amount of ink to the printing material, a sufficient film thickness is formed on the printing material.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A printing method according to the present invention will be described below with reference to FIG. First, in the doctor ring A, the tampon 8 located near the tip of the upper table 4 and in the raised position moves toward the printing original plate 5 as shown by the arrow. Next, in the step indicated by B, the tampon 9 that has reached above the printing original plate 5 descends on the printing original plate 5 for the first time and is pressed against the printing original plate 5. In this way, the tampon 9 that has adsorbed the ink from the printing original plate 5 rises in the step C and moves to the printing position in the subsequent step D. The tampon 9 does not descend here, performs doctoring in the G process, and moves toward the printing original plate 5.

After the doctor ring is completed, the tampon 9
In the H step, the second descending is performed on the printing original plate 5 and the printing original plate 5 is pressed against the printing original plate 5. In this way, the tampon 9 that picks up the ink from the printing original plate 5 moves up in the step I and moves to the printing position in the step J. Here, the tampon 9 enters the process of K, and the printing is performed by being strongly pressed against the material 6 to be printed. After the printing is completed, the tampon 9 is lifted at that position by the process of L to finish.

As described above, in the printing method according to the present invention, the ink adsorption is performed twice, but the transfer to the printing material 6 is performed only once. In this case the tampon 9 has 2
Since the ink for the batch is adsorbed, the film thickness comparable to that of the conventional two batches can be obtained by performing the printing by press-contacting the printing material 6 strongly. Data on top of the block gauge
Performs Npon printing result of measuring the film thickness by a dial gauge, from 3 microns by conventional printing methods 5
It has been confirmed by an experiment that the film thickness which was micron becomes 8 to 10 micron.

[0016]

Since the present invention is a printing method configured as described above, so-called " print misregistration " that often occurs in the conventional double-printing does not occur. This improves productivity and simplifies the jig for fixing the printed material. Since the film thickness can be increased by one transfer, color matching during ink color matching becomes easy.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating an order of a printing method according to the present invention.

FIG. 2 is a side view of a printing machine used for implementing the present invention.

FIG. 3 is an explanatory diagram illustrating a conventional order of double printing.

[Explanation of symbols] 1 printing machine 5 printing original plate 6 printed material 9 tampons

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (1)

[Claims] 1. A printing method in which a printing original plate and a printing material are arranged side by side, and a character or a graphic of the printing original plate is transferred to the printing material by sequentially contacting a tampo or a pad with both the printing original plate and the printing material. First, the tampo or pad is brought into contact with the ink-coated printing original plate to adsorb the ink, and then it is raised to move it above the substrate to be printed. A printing method characterized in that the ink is re-adsorbed by lowering it and bringing it into contact with the printing original plate, then raising it to move it to the upper side of the printing object, dropping it as it is, and strongly pressing on the printing object.