JP2003320294A - Blade mechanism for intaglio pickup roll and offset printing method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade mechanism for an intaglio pickup roll capable of continuously and stably applying uniform quantitative coating of high quality to an object to be coated, and to provide an offset printing method using the same. <P>SOLUTION: In the blade mechanism attached to the intaglio pickup roll, a coating agent guide plate reaching the region under the liquid surface of the coating agent in a coating agent reservoir from the lower part of the leading end of the guide plate is provided over the widthwise direction of a blade to pick up the coating agent, in the coating agent reservoir by the rotation of the intaglio pickup roll to hold the gap between the intaglio pickup roll and the coating agent guide plate to a liquidtight state. The excess coating agent scraped off by the blade is returned to the gap between the intaglio pickup roll and the coating agent guide plate. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade mechanism for an intaglio pick-up roll and an offset printing method using the same, and more specifically, to prevent air from being mixed into a coating agent in a coating agent reservoir. The present invention relates to a simple blade mechanism for an intaglio pickup roll having a configuration capable of continuously and stably applying high quality coating, and an offset printing method using the same.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view schematically showing an example of a conventional blade mechanism for an intaglio pickup roll. In the conventional blade mechanism for an intaglio pickup roll, after the coating agent 3 in the coating agent reservoir 2 is picked up by rotating the intaglio pickup roll 1 in the direction of the arrow, the blade 4 scrapes off the excess coating agent, After the quantified coating agent on the intaglio pick-up roll 1 is once transferred to the transfer roll 5, it is pressed by the pressure roll 6 to apply the coating agent on the transfer roll 5 to the object 7 to be coated. Has become.

[0003]

However, in the conventional blade mechanism for the intaglio pickup roll, the coating material in the coating material reservoir 2 is entrained by air when the excess coating material scraped off by the blade 4 falls. There is a problem in that the surface of the coating material 3 in the coating material reservoir 2 is corrugated by the rotating intaglio pick-up roll 1 and the air entrainment is further promoted. The bubbles generated in the coating agent 3 in the coating agent reservoir 2 are agitated by the rotation of the intaglio pick-up roll 1 to be divided into fine particles and are less likely to be broken, so that the content of bubbles increases. As described above, when fine particles of bubbles are mixed in the coating agent on the intaglio pickup roll 1 after the excess coating agent is scraped off by the blade 4, and bubbles of fine particles are mixed. However, there is a problem that the amount of coating agent in the intaglio mesh on the intaglio pick-up roll 1 cannot be quantified, the coating surface of the article to be coated 7 is mottled and non-uniform, and highly accurate quantitative coating cannot be performed. It was

A first object of the present invention is to solve the problems of the prior art, to prevent the excess coating material scraped off by the blade 4 from falling, and to apply the coating material reservoir 2 by the rotating intaglio pickup roll 1. The waviness 8 on the surface of the coating agent 3 inside is suppressed, and the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll 1 is quantified so that the object 7 to be coated can be stably and uniformly and accurately. It is an object of the present invention to provide a blade mechanism for an intaglio pickup roll having a simple structure capable of high-quantity coating, and a second object of the present invention is to provide an offset printing method using the blade mechanism.

[0005]

In order to solve the above-mentioned problems, a blade mechanism for an intaglio pickup roll according to claim 1 of the present invention is a blade mechanism attached to an intaglio pickup roll, which is arranged in a width direction of the blade. A coating agent guide plate that extends from the lower part of the tip of the coating material solution to the level below the coating agent liquid surface in the coating agent reservoir is provided, and the coating agent guide plate is provided by the rotation of the intaglio pickup roll. The coating material in the coating material reservoir is picked up to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate, and the excess coating agent scraped off by the blade is the intaglio pickup roll. And the coating material guide plate, and has a function of being returned.

A blade mechanism for an intaglio pickup roll according to claim 2 of the present invention is the blade mechanism for an intaglio pickup roll according to claim 1, wherein the coating agent guide plate is provided so as to be movable below the blade. The crossing angle between the blade and the coating agent guide plate can be adjusted so as to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate.

A blade mechanism for an intaglio pickup roll according to a third aspect of the present invention is the blade mechanism for an intaglio pickup roll according to the first aspect, wherein the coating material guide plate is fixedly provided at a lower portion of the blade, In order to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate, the distance between the blade side end of the coating agent guide plate and the intaglio pickup roll is the coating agent guide plate. Is wider as it is farther from the blade.

According to a fourth aspect of the present invention, the coating agent on the intaglio pick-up roll is first transferred to a transfer roll and then applied to the article to be coated. It is an offset printing method using the blade mechanism for an intaglio pick-up roll described in any one.

The blade mechanism for the intaglio pickup roll of the present invention is a blade mechanism attached to the intaglio pickup roll, and is a blade mechanism extending in the width direction of the blade from the lower end of its tip to the coating liquid level in the coating agent reservoir. A coating agent guide plate that reaches the bottom is provided, and this coating agent guide plate picks up the coating agent in the coating agent reservoir by the rotation of the intaglio pickup roll, and is between the intaglio pickup roll and the coating agent guide plate. Is kept liquid-tight, and the excess coating agent scraped off by the blade has the function of being returned between the intaglio pickup roll and the coating agent guide plate, so the extra coating scraped off by the blade The agent will not drop directly onto the coating agent surface in the coating agent reservoir, and the waviness of the coating agent surface in the coating agent reservoir due to the rotation of the intaglio pickup roll is suppressed, Consequently, to be able to quantify the amount of coating material in the intaglio mesh on intaglio pickup roller can accurate quantitation coating with uniform continuously and stably to be coated thereof. By the offset printing method using the blade mechanism for an intaglio pickup roll of the present invention, it is possible to perform continuous stable, uniform, and highly accurate quantitative coating on a coating object.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional explanatory view schematically showing an embodiment of a blade mechanism for an intaglio pickup roll of the present invention, and FIG. 2 is a perspective view for explaining the blade mechanism for an intaglio pickup roll of the present invention shown in FIG. It is a figure. As shown in FIG. 1 and FIG. 2, the blade mechanism for an intaglio pickup roll of the present invention is a blade mechanism attached to the intaglio pickup roll 1, and is applied from the lower portion of the tip end portion 4A thereof in the width direction of the blade 4. Coating agent 3 in coating agent reservoir 2 Coating agent guide plate 9 reaching below the liquid surface (for example,
Stainless steel) is provided. The coating agent guide plate 9 picks up the coating agent 3 in the coating agent reservoir 2 by the rotation of the intaglio pickup roll 1 to make the space between the intaglio pickup roll 1 and the coating agent guide plate 9 liquid-tight. In addition to having a function of keeping, the excess coating material 3 scraped off by the blade 4 is returned to between the intaglio pickup roll 1 and the coating material guide plate 9.

That is, when the intaglio pick-up roll 1 is rotated in the direction of the arrow, the coating agent 3 in the coating agent reservoir 2 flows in the arrow direction and is picked up, so that the space between the intaglio pick-up roll 1 and the coating agent guide plate 9 is increased. Is kept liquid tight (filled with coating liquid and no air enters). The coating material 3 supplied in a liquid-tight state between the intaglio pick-up roll 1 and the coating agent guide plate 9, and the coating material 3 applied to the surface of the intaglio pick-up roll 1 is scraped off by the blade 4. Since the excess coating material 3 scraped off is returned between the intaglio pick-up roll 1 and the coating material guide plate 9, it does not go outside.

The extra coating material 3 scraped off by the blade 4 is removed by the intaglio pickup roll 1 and the coating material guide plate 9.
Since it is returned to the outside and does not go outside, the scraped coating agent 3 does not fall directly onto the surface of the coating agent 3 in the coating agent reservoir 2. Even when the intaglio pick-up roll 1 rotates, the coating agent 3 in the coating agent reservoir 2 flows as shown by the arrow and is picked up between the intaglio pick-up roll 1 and the coating agent guide plate 9. Since it enters in a liquid-tight state, waviness on the surface of the coating agent 3 in the coating agent reservoir 2 is also suppressed. As a result, the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll 1 can be quantified, and the object 7 to be coated can be continuously stably and uniformly applied with a high accuracy.

Reference numeral 10 denotes a support for fixing and supporting the coating agent guide plate 9 in the vicinity of the lower portion of the tip 4A of the blade 4 in the width direction of the blade 4. In the present invention,
Even if the coating conditions such as the type of coating agent, viscosity, temperature, rotation speed of the intaglio pick-up roll, surface material, roughness, and dimensions change, the intaglio pick-up roll 1 and the coating agent guide plate 9
It is important that the coating agent 3 keeps the liquid-tight state between and. The means and method for maintaining the liquid-tight state between the intaglio pick-up roll 1 and the coating agent guide plate 9 with the coating agent 3 are not particularly limited, but shown as an example in FIG. A method of adjusting the intersection angle θ between the blade 4 and the coating agent guide plate 9 can be mentioned. Here, the crossing angle means the blade side end portion 9A of the coating agent guide plate 9.
Point b where the extension line a of the crosses the intaglio pick-up roll 1
Is an angle θ formed by the tangent line c and the extension line a. For example, when the viscosity of the coating material is high, or when the rotation speed of the intaglio pickup roll is high, it is preferable to increase this crossing angle θ, and conversely, when the viscosity of the coating material is low, or the intaglio pickup roll When the rotation speed is low, it is preferable to make the intersection angle θ small.

In order to adjust the intersecting angle θ in this manner, the coating agent guide plate 9 is movably installed under the tip portion 4A of the blade 4 by the support tool 10, and the optimum intersecting angle θ is set. After adjustment, it is preferable that the coating agent guide plate 9 can be fixed and supported.

As shown in FIG. 1, in order to maintain a liquid-tight state between the intaglio pickup roll 1 and the coating agent guide plate 9 with the coating agent 3, the blade side of the coating agent guide plate 9 is kept. It is preferable that the distance d between the end portion 9A and the intaglio pick-up roll 1 is narrowed and the distance D is widened as the coating agent guide plate 9 moves away from the blade 4 (that is, D> d). By doing so, the waviness of the surface of the coating agent 3 in the coating agent reservoir 2 can be further suppressed, and the amount of the extra coating agent 3 scraped off by the blade 4 can be reduced. Then, since an amount of the coating agent that can pass through the gap between the tip of the blade 4 and the surface of the intaglio pickup roll 1 can be applied to the surface of the intaglio pickup roll 1, the coating agent in the intaglio mesh on the intaglio pickup roll 1 The amount can be more quantified, and more stable and uniform quantitative coating can be performed.

In the above embodiment, the coating agent is applied to the surface of the intaglio pickup roll 1 using the blade mechanism for the intaglio pickup roll of the present invention, and then the coating agent on the intaglio pickup roll 1 is once transferred. Although an example of the offset printing method in which the material is transferred to the object to be coated 5 and then applied to the object to be coated 7 is shown, the invention is not limited to this embodiment without departing from the gist of the present invention. For example, the transfer roll 5 is not used. Alternatively, the coating agent on the intaglio pick-up roll 1 may be pressed by the pressure roll 6 to directly coat the article 7 to be coated.

The material of the coating material guide plate 9 used in the present invention,
The shape, dimensions, etc. are not particularly limited, and any material can be used as long as it can be used stably and continuously for a long period of time and can perform uniform quantitative coating with high accuracy.

The coating agent used in the present invention is not particularly limited as long as it can be coated and printed with an intaglio plate. Specifically, for example, an adhesive or pressure-sensitive adhesive applied by a method such as a gravure coater or a flexo coater, or an adhesive composed of a combination thereof can be mentioned. As these adhesives and pressure-sensitive adhesives, in addition to a solution type dissolved in a solution, an aqueous emulsion type, a hot melt type that solidifies by heating and melting after coating, a liquid oligomer or monomer is applied, and heating or ultraviolet rays, Some of them can be cured by irradiation with radiation such as an electron beam, and any of them can be used. Other examples of the coating agent used in the present invention include various known inks generally used for printing in a gravure printing machine or a flexographic printing machine. The type of ink may be any of solvent ink, radiation-curable ink that is cured by irradiation with radiation such as infrared rays, ultraviolet rays, and electron beams, water-based ink, and special ink, and is not particularly limited.

When the viscosity of the coating material used in the present invention becomes high, the shear stress due to the viscosity of the coating material picked up by the intaglio pick-up roll 1 becomes large, so that the coating material guide plate 9 having a high strength is used. In addition, as described above, the optimum value of the intersection angle θ changes depending on the coating conditions such as the viscosity of the coating agent, and the distance d and the distance D between the intaglio pickup roll 1 and the coating agent guide plate 9 can be changed. Since the optimum value also changes, it is preferable to appropriately set it according to the coating conditions.

Using an adhesive with a viscosity of 5000 cps,
When coating with the gravure coater method, a test was conducted with a distance d between the intaglio pickup roll 1 and the coating agent guide plate 9 in the vicinity of the tip 4A of the blade 4 set to about 3 mm. I was able to coat on paper without any problems.

The object to be coated used in the present invention is not particularly limited as long as it can be coated with an intaglio plate.
Specifically, for example, commonly used plastic materials (for example, polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), such as paper (for example, high-quality paper, art paper, coated paper, etc.), Polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS), polymethylmethacrylate (P
MMA), cellulose acetate butyrate (CA
B), cellulose propionate (CP) and the like). For plastic materials, corona discharge treatment, plasma treatment, UV irradiation treatment, electron beam irradiation treatment,
Those subjected to surface treatment such as flame plasma treatment and ozone treatment can be preferably used.

The above description of the embodiments is for explaining the present invention, and does not limit the invention described in the claims or reduce the scope thereof. Further, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

[0023]

The blade mechanism for the intaglio pickup roll according to the first aspect of the present invention is a blade mechanism attached to the intaglio pickup roll, and the coating material reservoir is provided from the lower end of the tip end thereof in the width direction of the blade. A coating agent guide plate that reaches below the coating agent liquid surface inside is provided, and the coating agent guide plate picks up the coating agent in the coating agent reservoir by rotation of the intaglio pickup roll. Maintaining a liquid-tight state between the intaglio pick-up roll and the coating agent guide plate, the excess coating agent scraped off by the blade is returned between the intaglio plate pickup roll and the coating agent guide plate. Since it has the function of being able to pick up the coating agent directly, there is no need for auxiliary pickup rolls, etc., the structure and structure are simple, and the workability such as cleaning improves. The coating material scraped off by the blade will not drop directly onto the coating material surface in the coating material reservoir, and the rotation of the intaglio pick-up roll will cause the coating material surface to wavy. As a result, the amount of coating agent in the intaglio mesh on the intaglio pick-up roll can be easily quantified, and stable, uniform and highly accurate quantitative coating can be performed on the object to be coated. Has a remarkable effect.

A blade mechanism for an intaglio pickup roll according to a second aspect of the present invention is the blade mechanism for an intaglio pickup roll according to the first aspect, wherein the coating agent guide plate is provided so as to be movable below the blade. The crossing angle between the blade and the coating agent guide plate can be adjusted so as to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate. It has the same effect as the blade mechanism for intaglio pick-up rolls, and even if the coating conditions change, the crossing angle can be easily adjusted to keep the liquid-tight state, and it is continuously stable on the coated object. As a result, a more remarkable effect that uniform and high-precision quantitative coating can be achieved.

A blade mechanism for an intaglio pickup roll according to claim 3 of the present invention is the blade mechanism for an intaglio pickup roll according to claim 1, wherein the coating agent guide plate is fixedly provided at a lower portion of the blade, In order to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate, the distance between the blade side end of the coating agent guide plate and the intaglio pickup roll is the coating agent guide plate. Is wider as it is farther from the blade, the same effect as the blade mechanism for the intaglio pick-up roll according to claim 1 can be obtained, and waviness of the coating agent surface in the coating agent reservoir can be further suppressed and scratched by the blade. The amount of excess coating agent dropped can be reduced, and it passes through the gap between the tip of the blade and the surface of the intaglio pickup roll. Since the amount only coating agent that can apply to the intaglio pickup roll surface, it can quantify more the amount of the coating agent in the intaglio mesh on intaglio pickup roll,
The further remarkable effect that more stable and uniform quantitative coating can be performed is obtained.

According to a fourth aspect of the present invention, the coating agent on the intaglio pick-up roll is first transferred to a transfer roll and then applied to the object to be coated. It is an offset printing method using the blade mechanism for the intaglio pick-up roll described in any one, can directly pick up the coating agent, no auxiliary pick-up roll, etc., simple structure and structure, workability such as cleaning improves Above, the coating agent scraped off by the blade does not fall directly onto the coating agent surface in the coating agent reservoir, and the coating agent surface in the coating agent reservoir due to rotation of the intaglio pickup roll Is also suppressed, and as a result, the amount of coating agent in the intaglio mesh on the intaglio pick-up roll can be easily quantified, and it is stable, uniform, and highly precise on the object to be coated. A marked effect such as can the amount coated.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view schematically showing an embodiment of a blade mechanism for an intaglio pickup roll of the present invention.

FIG. 2 is a perspective view illustrating a blade mechanism for an intaglio pickup roll of the present invention shown in FIG.

FIG. 3 is a sectional explanatory view schematically showing an example of a conventional blade mechanism for an intaglio pickup roll.

[Explanation of symbols]

1 Intaglio pickup roll 2 Coating agent reservoir 3 coating agents 4 blades 4A blade tip 5 Transfer roll 6 pressure roll 7 Object to be coated 8 Rippling 9 Coating agent guide plate 9A Coating agent guide plate blade side end 10 Support d, D interval θ crossing angle

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2C034 CA02 CA09                 4D075 AC23 AC28 AC29 AC53 AC72                       CB36 DA04 DB18 EA33                 4F040 AA22 AB04 AC01 BA25 CB02                       CB06 CB33                 4F042 AA22 AB00 CA03 DD07 DD46

Claims (4)

[Claims] 1. A blade mechanism attached to an intaglio pick-up roll, comprising a coating agent guide plate that extends from the lower part of the tip of the intaglio pickup roll to the position below the liquid level of the coating agent in the coating agent reservoir. Provided, the coating agent guide plate,
By rotating the intaglio pickup roll, the coating agent in the coating agent reservoir is picked up to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate,
A blade mechanism for an intaglio pick-up roll, which has a function of returning excess coating agent scraped off by the blade between the intaglio pick-up roll and the coating agent guide plate. 2. The coating material guide plate is movably provided at a lower portion of the blade, and the blade is provided so as to maintain a liquid-tight state between the intaglio pickup roll and the coating material guide plate. The blade mechanism for an intaglio pick-up roll according to claim 1, wherein an intersecting angle with the coating agent guide plate can be adjusted. 3. The coating agent guide plate is fixedly provided on the lower portion of the blade, and the coating agent is maintained so as to maintain a liquid-tight state between the intaglio pickup roll and the coating agent guide plate. The blade mechanism for an intaglio pick-up roll according to claim 1, wherein a gap between the blade side end of the guide plate and the intaglio pick-up roll is wider as the coating agent guide plate is farther from the blade. 4. The intaglio plate according to claim 1, wherein the coating agent on the intaglio pick-up roll is once transferred to a transfer roll, and then applied to an object to be coated. Offset printing method using a blade mechanism for a pickup roll.