JP4023784B2 - Intaglio pick-up roll blade mechanism and offset printing method using the same - Google Patents

Description

[0001]
BACKGROUND 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, suppresses air from being mixed into the coating agent in the coating agent reservoir, and continuously and stably. The present invention relates to a simple intaglio pick-up roll blade mechanism capable of performing high-quality coating and an offset printing method using the same.
[0002]
[Prior art]
FIG. 3 is a cross-sectional explanatory view schematically showing an example of a conventional intaglio pickup roll blade mechanism. In the conventional intaglio pick-up roll blade mechanism, the coating agent 3 in the coating agent reservoir 2 is picked up by rotating the intaglio pick-up roll 1 in the direction of the arrow, and then the excess coating agent is scraped off by the blade 4. The quantified coating agent on the intaglio pick-up roll 1 is once transferred to the transfer roll 5 and then pressed by the pressure roll 6 so that the coating agent on the transfer roll 5 is applied to the coated body 7. It has become.
[0003]
[Problems to be solved by the invention]
However, the conventional intaglio pick-up roll blade mechanism entrains air when the excess coating agent scraped off by the blade 4 falls, generates bubbles in the coating agent 3 in the coating agent reservoir 2, and rotates. The intaglio pick-up roll 1 has a problem that the surface of the coating agent 3 in the coating agent reservoir 2 is waved 8 and air entrainment is further promoted. The foam generated in the coating agent 3 in the coating agent reservoir 2 is agitated by the rotation of the intaglio pick-up roll 1 to be divided into fine particles and is difficult to be broken, so that the foam content increases. In this way, when the foam 4 becomes fine particles and the fine particles become mixed in the coating agent on the intaglio pick-up roll 1 after the excess coating agent is scraped off by the blade 4. The amount of the coating agent in the intaglio mesh on the intaglio pick-up roll 1 cannot be quantified, the coating surface of the coated body 7 is mottled and non-uniform, and accurate quantitative coating cannot be performed. It was.
[0004]
The first object of the present invention is to solve the conventional problems, prevent the excess coating agent scraped off by the blade 4 from dropping, and apply the coating in the coating agent reservoir 2 by the rotating intaglio pickup roll 1. Suppressing the undulation 8 on the surface of the working agent 3 and quantifying the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll 1 to continuously and uniformly apply the quantitative coating on the object 7 to be coated. The present invention is to provide a simple intaglio pick-up roll blade mechanism that can be worked, and a second object of the present invention is to provide an offset printing method using the same.
[0005]
[Means for Solving the Problems]
The blade mechanism for an intaglio pick-up roll according to claim 1 of the present invention for solving the above-mentioned problem is a blade mechanism attached to the intaglio pick-up roll, and is applied from the lower part of the tip portion in the width direction of the blade. A coating agent guide plate that reaches below the coating agent liquid level in the coating agent reservoir is provided, and the coating agent guide plate removes the coating agent in the coating agent reservoir by the rotation of the intaglio pick-up roll. The liquid is picked up and kept in a liquid-tight state between the intaglio pick-up roll and the coating agent guide plate, and an excess coating agent scraped off by the blade is formed between the intaglio pick-up roll and the coating agent guide plate. It is characterized by having a function to be returned in between.
[0006]
The intaglio pick-up roll blade mechanism according to claim 2 of the present invention is the intaglio pick-up roll blade mechanism according to claim 1, wherein the coating agent guide plate is provided so as to be movable below the blade, and the intaglio plate roll 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 pickup roll and the coating agent guide plate.
[0007]
The intaglio pick-up roll blade mechanism according to claim 3 of the present invention is the intaglio pick-up roll blade mechanism according to claim 1, wherein the coating agent guide plate is fixed to a lower part of the blade, and the intaglio pick-up roll is provided. In order to maintain a liquid-tight state between the roll and the coating agent guide plate, the distance between the blade side end of the coating agent guide plate and the intaglio pick-up roll is such that the coating agent guide plate is the blade. It is characterized by the fact that it spreads farther away.
[0008]
According to a fourth aspect of the present invention, the coating agent on the intaglio pick-up roll is once transferred to a transfer roll, and then coated on the object to be coated. This is an offset printing method using the described intaglio pick-up roll blade mechanism.
[0009]
The blade mechanism for an intaglio pick-up roll of the present invention is a blade mechanism attached to the intaglio pick-up roll, and reaches below the coating agent liquid level in the coating agent reservoir from the lower end of the tip portion in the width direction of the blade. A coating agent guide plate is provided, and this coating agent guide plate picks up the coating agent in the coating agent reservoir by the rotation of the intaglio pick-up roll and liquid-tightens between the intaglio pick-up roll and the coating agent guide plate. Since the excess coating agent scraped off by the blade is returned between the intaglio pick-up roll and the coating agent guide plate, the excess coating agent scraped off by the blade is applied. It will no longer fall directly on the surface of the coating agent in the coating agent reservoir, and the undulation of the coating agent surface in the coating agent reservoir due to the rotation of the intaglio pick-up roll is also suppressed. The amount of coating agent in the intaglio mesh on the pickup roller to be able to quantify, it is accurate quantitation coating with uniform continuously and stably to be coated thereof.
According to the offset printing method using the intaglio pick-up roll blade mechanism of the present invention, it is possible to continuously and stably apply a uniform and highly accurate quantitative coating to an object to be coated.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory sectional view schematically showing an embodiment of a blade mechanism for an intaglio pick-up roll of the present invention. FIG. 2 is a perspective view for explaining the blade mechanism for an intaglio pick-up roll of the present invention shown in FIG. FIG.
As shown in FIGS. 1 and 2, the intaglio pick-up roll blade mechanism of the present invention is a blade mechanism attached to the intaglio pick-up roll 1, and is applied from the lower part of the front end portion 4A of the blade 4 in the width direction. A coating agent guide plate 9 (for example, made of stainless steel) reaching the level of the coating agent 3 in the working agent reservoir 2 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 pick-up roll 1 so that the space between the intaglio pickup roll 1 and the coating agent guide plate 9 is liquid-tight. In addition to having a function of maintaining, the excess coating agent 3 scraped off by the blade 4 has a function of returning between the intaglio pickup roll 1 and the coating agent guide plate 9.
[0011]
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 direction of the arrow to be picked up and is liquid-tight between the intaglio pick-up roll 1 and the coating agent guide plate 9. Keep in a state (air does not enter when filled with coating solution). The coating agent 3 supplied between the intaglio pick-up roll 1 and the coating agent guide plate 9 in a liquid-tight state and applied to the surface of the intaglio pick-up roll 1 is scraped off by the blade 4. The excess coating agent 3 that has been scraped off is returned between the intaglio pick-up roll 1 and the coating agent guide plate 9, so that it does not go outside.
[0012]
Since the excess coating agent 3 scraped off by the blade 4 is returned between the intaglio pick-up roll 1 and the coating agent guide plate 9 and does not come out, the coating agent 3 thus scraped off is applied. It does not fall directly on the surface of the coating agent 3 in the agent reservoir 2. Even if the intaglio pick-up roll 1 rotates, the coating agent 3 in the coating agent reservoir 2 flows as indicated 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, the undulation of 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 uniform and highly accurate quantitative coating can be continuously and stably applied to the coated body 7.
[0013]
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 end portion 4 </ b> A of the blade 4 in the width direction of the blade 4.
In the present invention, the intaglio pick-up roll 1 and the coating guide plate are used even if the coating conditions such as the type, viscosity, temperature, rotational speed of the intaglio pick-up roll, surface material, roughness, and dimensions change. It is important to keep the liquid-tight state between the coating agent 3 and the coating agent 3. Means and method for maintaining a 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 are shown in FIG. 1 as an example. A method for adjusting the crossing angle θ between the blade 4 and the coating agent guide plate 9 can be mentioned.
Here, the intersection angle is an angle θ formed by the tangent line c and the extension line a at a point b where the extension line a of the blade side end 9A of the coating agent guide plate 9 intersects the intaglio pick-up roll 1. For example, when the viscosity of the coating agent is high, or when the rotational speed of the intaglio pick-up roll is high, it is preferable to increase this crossing angle θ. Conversely, when the viscosity of the coating agent is low, When the rotational speed is low, it is preferable to make this crossing angle θ small.
[0014]
In order to adjust the crossing angle θ in this way, the coating agent guide plate 9 is movably installed at the lower part of the tip 4A of the blade 4 by the support 10 and adjusted to the optimal crossing angle θ. It is preferable that the coating agent guide plate 9 can be fixed and supported.
[0015]
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 end portion 9A of the coating agent guide plate 9 is used. And the intaglio pick-up roll 1 are preferably narrowed and the distance D is increased as the coating agent guide plate 9 is further away from the blade 4 (ie, D> d). By doing so, the undulation of the surface of the coating agent 3 in the coating agent reservoir 2 can be further suppressed, and the amount of excess coating agent 3 scraped off by the blade 4 can be reduced. And since the coating agent of the quantity which can pass through the clearance gap between the front-end | tip of the braid | blade 4 and the intaglio pick-up roll 1 can be applied to the intaglio pick-up roll 1, the coating agent in the intaglio mesh on the intaglio pick-up roll 1 can be applied. The amount can be more quantified, and more stable, uniform and highly accurate quantitative coating can be achieved.
[0016]
In the above embodiment, the coating agent is applied to the surface of the intaglio pick-up roll 1 using the intaglio pick-up roll blade mechanism of the present invention, and then the coating agent on the intaglio pick-up roll 1 is temporarily transferred to the transfer roll 5. After that, an example of the offset printing method for coating the coated body 7 is shown, but the present invention is not limited to this embodiment unless departing from the gist of the present invention. It is also possible to apply the coating agent on the roll 1 directly to the coated body 7 by pressing with the pressure roll 6.
[0017]
The material, shape, dimensions, and the like of the coating agent guide plate 9 used in the present invention are not particularly limited as long as they can be used stably and stably over a long period of time and can be used for uniform and highly accurate quantitative coating. Can be used.
[0018]
The coating agent used in the present invention is not particularly limited as long as it can be coated and printed with an intaglio. 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 given. These adhesives and pressure-sensitive adhesives include solution type dissolved in solution, water-based emulsion type, hot melt type that solidifies by cooling after heating, melt application, liquid oligomer or monomer, etc. Some of them are 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 that are generally used for printing with a gravure printer or a flexographic printer. The ink type 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.
[0019]
When the viscosity of the coating agent used in the present invention increases, the shear stress due to the viscosity of the coating agent picked up and rotated by the intaglio pick-up roll 1 increases, so that it is necessary to use a coating agent guide plate 9 having a high strength. Further, as described above, the optimum value of the crossing angle θ varies depending on the coating conditions such as the viscosity of the coating agent, and the distance d and the distance D between the intaglio pick-up roll 1 and the coating agent guide plate 9 are also optimum values. Therefore, it is preferable to appropriately set according to the coating conditions.
[0020]
When coating with a gravure coater method using an adhesive having a viscosity of 5000 cps, the distance d between the intaglio pick-up roll 1 and the coating agent guide plate 9 in the vicinity of the tip 4A of the blade 4 was tested at about 3 mm. This adhesive could be coated on the coated paper without any problem.
[0021]
The coated body used in the present invention is not particularly limited as long as it can be coated with an intaglio. Specifically, for example, commonly used plastic materials (for example, polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), etc.) such as paper (eg fine paper, art paper, coated paper, etc.) Polycarbonate (PC), acrylonitrile / butadiene / styrene copolymer (ABS), acrylonitrile / styrene copolymer (AS), polymethyl methacrylate (PMMA), cellulose acetate butyrate (CAB), cellulose propionate (CP), etc.) And so on. As the plastic material, those subjected to surface treatment such as corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, electron beam irradiation treatment, flame plasma treatment and ozone treatment can be preferably used.
[0022]
The description of the above embodiment is for explaining the present invention, and does not limit the invention described in the claims or reduce the scope. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.
[0023]
【The invention's effect】
The intaglio pick-up roll blade mechanism according to claim 1 of the present invention is a blade mechanism attached to the intaglio pick-up roll, and the coating agent in the coating agent reservoir from the lower part of the tip of the blade mechanism in the width direction of the blade. A coating agent guide plate reaching below the liquid level is provided, and the coating agent guide plate picks up the coating agent in the coating agent reservoir by rotation of the intaglio pick-up roll, and the intaglio pick-up roll. Maintaining a liquid-tight state between the coating agent guide plate and a function of returning excess coating agent scraped off by the blade between the intaglio pick-up roll and the coating agent guide plate Therefore, the coating agent can be directly picked up, an auxiliary pick-up roll is not required, the structure and structure are simple, workability such as cleaning is improved, and the blade is The coating agent that has been scraped off does not fall directly on the coating agent surface in the coating agent reservoir, and the surface of the coating agent in the coating agent reservoir caused by the rotation of the intaglio pick-up roll As a result, the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll can be easily quantified, and it is possible to perform continuous, uniform and highly accurate quantitative coating on the object to be coated. Has an effect.
[0024]
The intaglio pick-up roll blade mechanism according to claim 2 of the present invention is the intaglio pick-up roll blade mechanism according to claim 1, wherein the coating agent guide plate is provided so as to be movable below the blade, and the intaglio plate roll The intaglio pick-up roll according to claim 1, wherein 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 pickup roll and the coating agent guide plate. The same effect as the blade mechanism, and even if the coating conditions change, the crossing angle can be easily adjusted accordingly to maintain a liquid-tight state. With this, there is a further remarkable effect that quantitative coating with higher accuracy can be performed.
[0025]
The intaglio pick-up roll blade mechanism according to claim 3 of the present invention is the intaglio pick-up roll blade mechanism according to claim 1, wherein the coating agent guide plate is fixed to a lower part of the blade, and the intaglio pick-up roll is provided. In order to maintain a liquid-tight state between the roll and the coating agent guide plate, the distance between the blade side end of the coating agent guide plate and the intaglio pick-up roll is such that the coating agent guide plate is the blade. Accordingly, the same effect as that of the intaglio pick-up roll blade mechanism according to claim 1 can be obtained, and the undulation of the coating agent surface in the coating agent reservoir can be further suppressed, and the blade is scraped off by the blade. The amount of excess coating agent can be reduced, and only the amount that can pass through the gap between the blade tip and the surface of the intaglio pick-up roll Since the coating agent is applied to the intaglio pick-up roll surface, the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll can be further quantified, and more stable, uniform and highly accurate quantitative coating can be performed. Has a remarkable effect.
[0026]
According to a fourth aspect of the present invention, the coating agent on the intaglio pick-up roll is once transferred to a transfer roll, and then coated on the object to be coated. It is an offset printing method using the intaglio pick-up roll blade mechanism described above, can directly pick up the coating agent, no auxiliary pick-up roll is required, the structure and structure are simple, workability such as cleaning is improved, and The coating agent scraped off by the blade no longer falls directly onto the coating agent surface in the coating agent reservoir, and the coating agent surface in the coating agent reservoir is also wavy due to the rotation of the intaglio pick-up roll. As a result, the amount of the coating agent in the intaglio mesh on the intaglio pick-up roll can be easily quantified, and a constant, uniform and highly accurate quantitative coating can be applied to the coated body. A marked effect of Runado.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view schematically showing an embodiment of a blade mechanism for an intaglio pick-up roll of the present invention.
2 is a perspective view for explaining the intaglio pickup roll blade mechanism of the present invention shown in FIG. 1; FIG.
FIG. 3 is an explanatory cross-sectional view schematically showing an example of a conventional intaglio pick-up roll blade mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Intaglio pick-up roll 2 Coating agent reservoir 3 Coating agent 4 Blade 4A Blade tip part 5 Transfer roll 6 Pressure roll 7 Coated body 8 Corrugation 9 Coating agent guide plate 9A Blade side end of coating agent guide plate Part 10 Support tool d, D Interval θ Crossing angle

Claims (4)

It is a blade mechanism attached to the intaglio pick-up roll, and is provided with a coating agent guide plate that reaches the bottom of the coating agent liquid level in the coating agent reservoir from the lower end of the tip portion over the width direction of the blade, The coating agent guide plate picks up the coating agent in the coating agent reservoir by rotation of the intaglio pickup roll and keeps the space between the intaglio pickup roll and the coating agent guide plate in a liquid-tight state, A blade mechanism for an intaglio pick-up roll having a function of returning an excess coating agent scraped off by the blade between the intaglio pick-up roll and the coating agent guide plate. The coating agent guide plate is provided to move below the blade, and the blade and the coating agent guide are maintained in a liquid-tight state between the intaglio pick-up roll and the coating agent guide plate. The intaglio pick-up roll blade mechanism according to claim 1, wherein an angle of intersection with the plate can be adjusted. The coating agent guide plate is fixed to the lower part of the blade, and the blade side of the coating agent guide plate is maintained in a liquid-tight state between the intaglio pickup roll and the coating agent guide plate. 2. The blade mechanism for an intaglio pick-up roll according to claim 1, wherein an interval between the end portion and the intaglio pick-up roll becomes wider as the coating agent guide plate is separated from the blade. The intaglio pick-up roll blade mechanism according to any one of claims 1 to 3, wherein the coating agent on the intaglio pick-up roll is once transferred to a transfer roll and then coated on the object to be coated. Offset printing method using

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