JPH11254397A - Rotary die cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a minimum required small amount of mold releasing agent stably to the tip of a die cutting edge. SOLUTION: This device passes adhesive paper 10 consisting of top paper, an adhesive layer, and released paper between a die cut roller 8 and a receiving roller 9 to die-cut the top paper of the adhesive paper 10. A mold releasing agent application roller 7 is formed, which comes into rolling contact with the die cut roller 8 and applies molding releasing agent 3 to the die cut edge of the die cut roller 8. On both the ends of the mold releasing agent application roller 7 and the die cut roller 8, a roller side bearer 18 and a die cut roller side bearer 19 are formed, which come into contact with each other and apply a fixed amount of mold releasing agent 3 for the die cut edge by the mold releasing agent application roller 7 to the required portion of the tip of the die cut edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing a paper by passing an adhesive paper comprising a top paper (substrate), an adhesive layer and a release paper between a rotating die-cut roll and a receiving roll.
The present invention relates to a rotary die-cutting apparatus used for producing only an adhesive label or the like by punching, ie, die-cutting, only the top sheet of the adhesive paper into a required planar shape, and is mainly applied to a rotary printing machine or the like.

[0002]

2. Description of the Related Art Conventionally, as an example of a die cutting apparatus known as a half-cut method for adhesive paper applied to a rotary printing machine or the like, a rotary die-cut unit arranged in a printing process combining a plurality of printing roll units is known. In some cases, the paper sheet is subjected to half cutting. In this apparatus, half-cutting of a sheet is performed by a die-cut roll that rotates at the same speed as the traveling speed of the sheet, and the pressure of the die-cut blade with respect to the sheet is uniform. When the leaf hardness is small, there is a portion where the extraction pressure is uniform but the extraction depth is not uniform. Therefore, in the part where the punching depth is uneven,
If the cutting depth is deep, the edge of the die-cut blade reaches the base material and damages the base material, and the adhesive penetrates into the damaged part and the adhesive penetrates when the upper paper is peeled off from the base material. However, there is a disadvantage that the releasability of the upper paper is deteriorated.

[0003] In order to solve the above-mentioned drawbacks, a hollow shaft impregnated with a release agent-impregnated cloth is wound on a die-cut roll by its own weight and rotated to apply the release agent to a die-cut blade. However, this device has irregular rotation of the hollow shaft, irregularities on the shaft surface, the pressure in contact with the die-cut blade is not stable, and the amount of the release agent applied is not constant. . Thus, if the release agent is excessively applied to the die-cut blade, that is, if it is applied from the edge of the die-cut blade to the root, excessive release agent permeates from the surface of the paper sheet, There is a problem that the surface of the upper paper is contaminated, and that the release agent unnecessarily penetrates the pressure-sensitive adhesive layer and reduces the adhesive strength of the pressure-sensitive adhesive.

[0004]

In the conventional apparatus in which the release agent is applied to the die-cut blade as described above, the pressing pressure in contact with the blade edge of the die-cut blade is unstable, and the amount of the release agent applied is small. Inconsistent, especially when the release agent is excessively applied to the die-cut blades, the present invention has a large adverse effect, so the present invention can stably supply a minimal amount of the required release agent to the cutting edge of the die-cut blade. It is an object of the present invention to provide a rotary die cutting device.

[0005]

The rotary die cutting apparatus according to the first aspect of the present invention comprises a top paper 11, an adhesive layer 12, and a release paper 13 between a rotating die cut roll 8 and a receiving roll 9. In a die-cutting apparatus in which the upper paper 11 of the adhesive paper 10 is die-cut by passing through the adhesive paper 10, the die-cutting roller 14 is rotated in contact with the die-cut roll 8 to apply the release agent 3 to the die-cut blade 14 of the die-cut roll 8. The mold applying roll 7 is provided, and both ends of the mold applying roll 7 and the die cut roll 8 are in contact with each other, and the application of the mold releasing agent 3 to the die cut blade 14 by the mold applying roll 7 is performed by the die cut blade 14. And a cut roll side bearer 18 and a die cut roll side bearer 19 for applying a fixed amount to a required portion of the cutting edge.

According to a second aspect of the present invention, in the rotary die cutting apparatus according to the first aspect, the die-cut roll-side bearer 19 rotates in contact with the receiving roll 9, and the adhesive paper passage gap between the die-cut roll 8 and the receiving roll 9. Is regulated.

A third aspect of the present invention is the rotary die cutting apparatus according to the first or second aspect, wherein the die-cut roll-side bearer 19 is provided rotatably with respect to the die-cut roll shaft 8a.

According to a fourth aspect of the present invention, in the rotary die-cutting device according to any one of the first to third aspects, the release agent applying roll has a lower part immersed in the release agent reservoir in the release agent attaching roll. The mold release agent 3 is transferred from the first through the kneading rolls 5 and 6.

[0009]

1 and 2 are a vertical sectional side view and a front view, respectively, showing an entire rotary die cutting apparatus according to the present invention. In these figures, reference numeral 1 denotes a mesh-shaped release agent take-out roll (anilox roll) which rotates by dipping the lower part into a release agent reservoir 2, 4 denotes a doctor blade, 5
And 6 are kneading rolls each having a surface portion made of rubber or soft synthetic resin. Reference numeral 7 denotes a release agent application roll having a surface portion made of rubber or a soft synthetic resin; 8, a metal die-cut roll having a die-cut blade 14 (see FIG. 4) projecting from the outer peripheral surface; 9, a metal receiving roll. Reference numeral 10 denotes an adhesive paper passing between the die cut roll 8 and the receiving roll 9,
As shown in FIG. 4, a top paper (base material) 11 and an adhesive layer 12
And a release paper 13 coated with silicone. The release layer is indicated by 13a in FIG.

Release agent releasing roll 1 and kneading rolls 5, 6
Are horizontally mounted on support arms 16, 16 projecting from the upper portions of the main body frames 15, 15 so as to be rotatable with each other. A receiving roll 9 is horizontally supported at a fixed position below the main body frames 15, 15, and a die-cut roll 8 is disposed above the receiving roll 9 so as to be in contact with its own weight, and a die is released above the die-cut roll 8. The dispensing roll 7 is also arranged to be in contact with its own weight. The receiving roll 9 is fixed to a roll shaft 9a, and both ends of the roll shaft 9a are supported by the main body frames 15, 15 by bearings 17, 17.

The release agent applying roll 7 is fixed to a roll shaft 7a, and bearers 18, 18 are concentrically and rotatably mounted on the roll shaft 7a at fixed positions near both ends of the roll 7. Each bearer 18 is formed of, for example, a ball bearing, and its outer diameter is slightly (several μ to several tens μ) smaller than the outer diameter of the release agent applying roll 7. A plurality of die-cutting blades 14 are formed on the outer peripheral surface of the die-cut roll 8 and have a circular or other endless outer edge of a required shape in plan view. The height of the die cutting blade 14 is about 1.0 to 1.5 mm. The die cut roll 8 is fixed to a roll shaft 8a.
a at both ends of the wear roll side bearers 18, 18
Are integrally formed concentrically. The outer diameter of each bearer 19 is formed to be slightly larger (several μ to several tens μ) than the outer diameter of the die cut roll 8. The die-cut roll-side bearers 19 are in contact with both ends of the outer peripheral surface of the receiving roll 9.

As shown in FIG. 2, a release agent take-out roll 1
The kneading rolls 5, 6, the release agent attaching roll 7, the die cut roll 8, and the receiving roll 9 are provided with these roll shafts 1a, 5
a, 6a, 7a, 8a, 9a attached to one end of each of the gears 21, 22, 23, 24,
By driving the driving rollers 25 and 26 by driving means (not shown), the adjacent rolls rotate in conjunction with each other in the forward direction. The receiving roll 9 is provided on the main body frame 1.
The die-cut roll 8 is supported on the receiving roll 9 via the die-cut roll-side bearers 19, 19, and is supported on the receiving roll 9 via the bearings 17, 17, at the lower fixed positions of 5, 5 and 15. Roll 7 is the wear roll side bearer 1
3, and supported by die-cut roll-side bearers 19, 19, and as shown in FIG. 3, bearings are provided at both ends of a roll shaft 7a of the mold release roll 7 and a roll shaft 8a of the die-cut roll 8, respectively. The upper and lower bearings 27, 28 are respectively supported by a pair of vertical guides 29, 29 sandwiching them from both sides, whereby the release agent setting roll 7 and the die cut roll 8 receive the receiving roll. 9 is held at the position immediately above.

In FIG. 1 to FIG. 3, reference numeral 30 denotes a bearing roll 27, a die-cut roll-side bearer 19, a receiving roll 9, which presses down each bearing 27 attached to the roll shaft 7 a of the mold release roll 7. Are screw screws on the main body frame 15 which are holding screw rods for maintaining a mutual contact state. Reference numeral 31 denotes a handle for rotating the screw rod 30, and reference numeral 32 denotes a lock nut. FIG.
In the figure, 7o is the axis of the release agent applying roll 7, 8o is the axis of the die cut roll 8, and 9o is the axis of the receiving roll 9.

The wear roll side bearer 18 and the die cut roll side bearer 19 are in contact with each other and rotate to apply a fixed amount of the release agent of the release agent application roll to a required portion of the cutting edge of the die cut blade. The die-cut roll-side bearer 19 rotates in contact with the receiving roll 9 to regulate the gap between the die-cut roll 8 and the receiving roll 9 through which the adhesive paper passes. Therefore, the axis of the wear roll side bearer 18 (also the axis 7o of the release agent applying roll 7).
(The radius of the bearer 18) and the axis of the die-cut roll-side bearer 19 (the axis 8 of the die-cut roll 8).
o) (the radius of the bearer 19), the pressing pressure between the release agent applying roll 7 and the die cut roll 8 can be set as desired. A required amount of the release agent 3 can be applied to the part.

In this case, the die-cut roll-side bearer 19 is formed integrally with the die-cut roll 8, but the wear-roll-side bearer 18 is attached to the release roll 7 in a separated state. So
Changing the distance of the wear roll side bearer 18 from the axis, that is, the wear roll side bearer 18 having a different radius;
By changing the application amount, the application amount of the release agent 3 to the die-cut blade 14 and the pressing pressure between the release agent application roll 7 and the die-cut roll 8 can be changed and adjusted as desired.

The rotary die-cutting apparatus constructed as described above is basically the same as a conventional flexographic printing apparatus, in which a releasing agent delivery roll 1, kneading rolls 5, 6 By rotating the coating roll 7, the die-cut roll 8, and the receiving roll 9 in an interlocking manner as shown in FIG. 1, the release agent 3 on the surface of the release agent take-out roll 1 is scraped off by the doctor blade 4, and the release agent is removed. The release agent 3 remaining on the surface of the delivery roll 1 is
And further transferred to the next kneading roll 6. The kneading rolls 5 and 6 have a role of eliminating streaks on the release agent 3 on the surface of the release agent delivery roll 1 by the doctor blade 4. The release agent 3 having passed through the kneading rolls 5 and 6 is subsequently transferred to a release agent attaching roll 7, and is applied from the surface of the release agent attaching roll 7 to a die-cut blade 14 of a die-cut roll 8 as shown in FIG. Is done.

When the release agent 3 is applied from the surface of the release agent application roll 7 to the die-cut blade 14 of the die-cut roll 8, the die-cut roll bearer 18 and the die-cut roll-side bearer 19 that come into contact with each other cause die-cutting. Since the required edge of the blade 14 is pressed against the surface of the release agent applying roll 7 at a constant pressure, a certain amount of a trace amount of the release agent 3 is uniformly applied from the release agent applying roll 7 to the edge of the die-cut blade 14. Will be applied.

In this way, the die-cutting blade 14 having a very small amount of the release agent 3 applied to the cutting edge of the die-cutting blade 14 is rotated by the die-cutting roll 8 as shown in FIG. Then, only the upper paper 11 is cut while leaving the release paper 13 in the adhesive paper 10 passing through the gap. At this time, even if the blade edge of the die-cut blade 14 reaches the adhesive layer 12 of the adhesive paper 10, the release agent 3 is applied to the die-cut blade edge in a very small amount, so that the adhesive force of the adhesive is reduced. Nothing. Also, die-cut blade 14
Even if the blade edge of the die reaches the release paper 13 further from the adhesive layer 12, the release agent 3 of the die-cut blade edge does not deteriorate the peeling of the upper paper 11.

In the above case, in order to apply a very small amount of the release agent 3 to the cutting edge of the die-cut blade 14, the release agent application roll 7
The pressing pressure and the hardness of the release agent are important,
If the hardness is too hard, the surface of the wearing roll 7 is damaged by the cutting edge of the die-cut blade 14, and the cutting edge is easily worn, and cannot be used for a long time. Therefore, when applying a trace amount of the release agent 3 to the cutting edge of the die-cut blade 14, the pressing pressure of the release agent application roll 7 is preferably such that the surface of the application roller 7 is depressed by about 5 to 20 μm. The hardness of the setting roll 7 is preferably in the range of JIS-A, 20 to 40 (90).

In the above embodiment, the die-cut roll 8 is supported by its own weight on the receiving roll 9 via the bearer 19, but the die-cut roll 8 is independently mounted on the main body frames 15, 15. At the same time, the die-cut roll-side bearer 19 may receive the roll 9 in a non-contact state.

[0021]

According to the first aspect of the present invention, there is provided a rotary die cutting apparatus, wherein both ends of a release agent forming roll and a die cut roll are in contact with each other, and the release agent of the releasing agent forming roll is supplied to the cutting edge of the die cut blade. By providing a wear roll-side bearer and a die-cut roll-side bearer for application to the required parts, the required minimum amount of release agent is applied to the cutting edge of the die-cut blade, and the applied amount is constant. In addition, it is possible to prevent adverse effects due to an excessive amount of application, and to stably peel off the upper paper without variation.

According to the second aspect, the gap between the die-cut roll and the receiving roll is regulated by rotating the bearer on the die-cut roll side in contact with the receiving roll to thereby stabilize the adhesive paper. Die cut can be performed.

According to the third aspect, since the die-cut roll-side bearer is provided rotatable with respect to the die-cut roll axis, the die-cut roll rotates regardless of the rotation of the bearer, and the rotation of the roll is stably and constantly maintained. can do.

According to the fourth aspect of the present invention, the release agent is transferred to the release agent application roll via a kneading roll from a release agent delivery roll whose lower portion is immersed in the release agent reservoir. Therefore, the supply amount of the release agent to the release agent application roll can be kept constant, and the application amount of the release agent applied to the die-cut blade of the die-cut roll can be further stabilized.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a rotary die cutting apparatus of the present invention, and is an enlarged sectional view taken along line XX of FIG.

FIG. 2 is a front view of the rotary die cutting device.

FIG. 3 is an enlarged sectional view taken along line YY of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line ZZ of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 release agent discharge roll 2 release agent reservoir 3 release agent 4 doctor blade 5, 6 kneading roll 7 release agent attaching roll 8 die cut roll 9 receiving roll 10 adhesive paper 11 top paper 12 adhesive layer 13 release paper 14 die cut Roll die cut blade 18 Wear roll side bearer 19 Die cut roll side bearer

Claims (4)

[Claims] 1. A die cutting apparatus in which an adhesive paper comprising an upper paper, an adhesive layer and a release paper is passed between a rotating die cut roll and a receiving roll to die-cut the upper paper of the adhesive paper. A release agent applying roll for applying a release agent to the die-cut blade of the die-cut roll by rotating in contact with the die-cut roll is provided. A rotary die cutting apparatus comprising a forming roll-side bearer and a die-cut roll-side bearer for applying a fixed amount of a release agent of a mold forming roll to a required portion of a cutting edge of a die-cut blade. 2. The die-cut roll-side bearer is adapted to rotate in contact with a receiving roll to regulate a gap between the die-cut roll and the receiving roll, which passes through the adhesive paper. Rotary die cutting equipment. 3. The rotary die cutting apparatus according to claim 1, wherein the die-cut roll-side bearer is provided rotatably with respect to the die-cut roll axis. 4. The release agent applying roll is characterized in that the release agent is transferred from a release agent take-out roll whose lower portion is immersed in a release agent reservoir via a kneading roll. The rotary die cutting device according to claim 1.