JPH0719758Y2 - Moisture adding device for adhesive sheet for die cutting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for applying moisture to the surface of a base paper of a pressure-sensitive adhesive sheet for die-cutting processing, prior to the die-cutting processing.

[0002]

2. Description of the Related Art Generally, a pressure-sensitive adhesive sheet obtained by polymerizing and integrating paper or plastic film on the back side of a base paper made of paper or plastic film through an adhesive is widely used as so-called tack paper. After printing an appropriate image on the surface of the base paper of such an adhesive sheet, by die cutting the two layers of the base paper and the adhesive, or the entire adhesive sheet including the release paper, into a predetermined opening shape. Printed materials such as labels, stickers, letters, stickers, etc. are produced.

Also, for example, like a double-sided adhesive tape that is used as an assembly part of a so-called small calculator, the same die-cutting process can be performed at once without printing in the preceding process. Has been done.

However, in the die-cutting process of this type of pressure-sensitive adhesive sheet, even the pressure-sensitive adhesive that is impregnated or applied to the above-mentioned base paper is
The cutting action is performed by the blade die.At that time, the pressing force of the blade die also acts on the surface of the base paper.Therefore, the adhesive gradually dipped from the back surface of the base paper during the repetition of the die cutting process. At the time of feeding (so-called glue swelling phenomenon), the adhesive adheres to and accumulates on the surface of the blade die, reducing the cutting ability and life of the blade edge at an early stage, and finally, from the blade die to the surface of the base paper. This causes a vicious circle in which the adhesive transfers again.

When the adhesive is attached to the blade die, the adhesive sheet is forcibly pulled by it, and the printing position and the punching position with respect to this are displaced. Further, when the pressure-sensitive adhesive is transferred to the surface of the base paper, if the surface has been printed in the previous step, the finished product becomes a defective product.

Further, when the pressure-sensitive adhesive sheet is in the form of a non-sheet-wrapping paper, the pressure-sensitive adhesive also wraps around the back surface of the release paper, and the back surface of the release paper and the front surface of the base paper are bonded and integrated. Therefore, it is not possible to keep the finished product in an orderly and uniform polymerization state.

[0007] Therefore, the applicant of the present invention relates to a method invention, characterized in that the surface of the base paper or / and the blade edge of the blade die is wetted by applying water in the die-cutting process of the adhesive sheet as described above. Japanese Patent Application No. 1-236571 was proposed.

[0008]

However, as shown in FIG. 6 of the above-mentioned invention of the present application, the die-cutting processing device (B) is used as the moisture imparting device (D) for carrying out the method.
Perforating the mounting base (27) of the blade mold (16) in
In the configuration of forming the water supply pipe (25a) toward the cutting edge part (28) and supplying water from the water storage tank (23a) to the water supply pipe line (25a) under pressure, moisture is applied to the cutting edge part (28). It is necessary to additionally process and install the moisture imparting device (D) for each of the various blade dies (16) whose punching shapes differ and change, which is extremely troublesome and cannot expect a mass production effect. Poor versatility.

[0009]

In order to solve the above problems, the present invention has an adhesive sheet for die-cutting processing, which is composed of a release paper polymerized and integrated with an adhesive on the back surface of a base paper. As a device for imparting moisture to the surface of the base paper during the conveyance of, the plural papers are axially mounted in a parallel state before and after traversing the upper position of the base paper so as to elastically contact with the surface of the base paper and rotate. Of the rotating roll, a plurality of water discharge nozzles fixedly piped in the upper position so as to drip water on the circumferential surface of the rotating roll, and the front of the rotating roll located on the most front side in the transport direction of the adhesive sheet. And a pair of draining guides that face the left and right ends of the base paper so as to elastically contact the base paper from above, and the water dripping from the nozzle is transferred to the surface of the base paper by a rotating roll. Attached to the state Is intended to mainly characterized in that the set to.

[0010]

According to the above construction of the present invention, since moisture is applied to the surface of the pressure-sensitive adhesive sheet base paper, the pressure-sensitive adhesive of the pressure-sensitive adhesive sheet does not adhere to the portion wetted by the water, and the so-called glue-swell phenomenon is suppressed. As a result, even if the pressure-sensitive adhesive sheet is repeatedly die-cut by the blade die of the die-cutting device thereafter, there is no fear that the cutting ability of the blade tip portion will be deteriorated or damaged.

Further, by applying moisture, static electricity and heat generated from the blade tip of the blade die are eliminated, so that the life of the blade die can be improved and the positional deviation due to the inquiry between the blade die and the adhesive sheet. Since it does not occur, it is possible to obtain a highly accurate die-cutting processing state or printing state.

Further, during the transportation of the pressure-sensitive adhesive sheet, a rotating roll that elastically contacts with the surface of the base paper,
Since it is applied or wiped so as to transfer water, it can be installed and installed very easily in the manufacturing process of printed matter and double-sided adhesive tape using the pressure-sensitive adhesive sheet as a material. Excellent in productivity and mass production effect.

That is, in the case where water is applied to the cutting edge portion of the blade die which constitutes the die cutting apparatus, it is necessary to prepare the blade die as a variety of products having different target cutting shapes, and therefore the water is applied. As for the device, each blade must be attached separately, which is inferior in mass productivity and versatility, but the present invention can solve such a problem.

Further, on the surface of the base paper in the adhesive sheet,
Multiple rotating rolls are mounted side by side in a parallel state, and the elastic membrane on the circumferential surface makes light contact with the surface of the base paper to rotate and rotate, while transferring water to the surface of the base paper. Therefore, water can be uniformly applied as a whole as a whole, and there is no fear of giving resistance to the action of conveying the pressure-sensitive adhesive sheet.

Further, in relation to the conveying direction of the adhesive sheet, a pair of draining guides facing the left and right ends of the adhesive sheet are also installed in front of the rotating roll located at the frontmost side, which is the base paper. Since it comes into contact with the surface elastically and drains water at the left and right ends of the base paper, there is no risk that the moisture given by the rotating roll will accidentally get around from the left and right ends of the base paper to the back surface. As a result, it is possible to prevent the release paper from being cut by the blade die in the subsequent die-cutting process of the adhesive sheet.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific construction of the present invention will be described in detail below with reference to the illustrated embodiments. First, FIG. 1 shows a manufacturing process of a label, a sticker and the like, and (M) shows such a printed matter. It is a general term for pressure-sensitive adhesive sheets (commonly called “tack paper”), which is a base paper (12) having an adhesive (11) applied to its back surface.
And a release paper (13) polymerized and integrated with the base paper (12) via the adhesive (11).
2) As the release paper (13), not only paper but also plastic film may be used.

Such a band-shaped adhesive sheet (M) in the form of a non-sheet wrapping paper is automatically and intermittently fed out from the feeding roll (14) and conveyed, and in the course of the conveyance, the base paper ( A constant image line (15) is printed on the surface of (12), and then an opening (1) having a constant shape is formed by the intermediate blade die (16) of the die-cutting processing device (B).
Cut out 7).

After that, the die-cut peripheral portion of the pressure-sensitive adhesive sheet (M) is scraped off with another peeling tape (18), so to speak, and the remaining pressure-sensitive adhesive sheet (M) is left.
Is once wound on a winding roll (19), or is automatically sent to the cutting device (not shown) without winding the winding roll.
Through the cutting process, the printed matter such as a label as shown in FIGS. 2 and 3 is finished. Since (C) dries the printing ink, UV that is interposed immediately after the printing device (A) is used.
The device is shown.

In the printed matter of FIGS. 2 and 3, the adhesive sheet (M) is used.
In the adhesive sheet (M), the opening (17) having a constant shape is cut out so as to cover two layers of the base paper (12) and the adhesive (11) in FIG.
It is also possible that the whole is cut out into a certain shape.

Further, as suggested from FIG. 1, the base paper (1
In order to protect the printing surface of 2), a masking sheet (20) made of a transparent plastic film may be attached to the surface of the base paper (12) during the drying process of the printing ink and the die cutting process. In this case, the masking sheet (20) is also cut out all at once by the die cutting processing device (B).

As a modified example of FIG. 1, FIG. 4 shows a manufacturing process of a double-sided adhesive tape which is an assembly part of a small calculator or the like. In this case, as is clear from the comparison of both figures, the printing device (A) is shown. The installation of the UV device (C) is omitted, and the adhesive sheet (M) is only punched into a certain shape through the die-cutting device (B). That is, the printing of the pressure-sensitive adhesive sheet (M) on the surface of the base paper can be omitted even if it is omitted.

In any case, the moisture applicator (D) of the present invention is used when the adhesive sheet (M) of the material is die-cut in the manufacturing process of the above-mentioned printed matter or double-sided adhesive tape. It is used in front of the punching device (B), which automatically gives a small amount of water to the surface of the base paper (12) and keeps the surface appropriately wet. You can do

The moisture imparting device (D) for that purpose is shown in FIGS.
It has a configuration like. That is, (21) is a device frame, which is assembled into a unit that can be opened and closed freely from the water storage tank (22) at the bottom and the cover case (23) at the top, and the adhesive sheet (M) is placed between the upper and lower parts. It is supposed to be transported in the direction of the arrow in FIGS.

Reference numeral (24) denotes a plurality of roll spindles that are supported in parallel with each other so as to traverse over the base paper (12) of the adhesive sheet (M), and each of them has a rotating roll (25). Has been overfitted. Each of the rotating rolls (25) has a barrel (26) made of metal or hard plastic.
And an elastic membrane (27) such as cotton or sponge that is attached to and integrated with the circumferential surface, and the elastic membrane (27) elastically contacts the surface of the base paper (12), In opposition to the conveying action of the adhesive sheet (M), the self-rotating motion is performed so as to wipe the surface of the base paper (12). That is, base paper (12)
It is designed to rotate due to the frictional force between and.

In this case, as is apparent from FIG. 7, a plurality of short rotary rolls (25) are rotatably attached to each of the roll support shafts (24) and can be slid in the axial direction (horizontal direction). It is preferably operably fitted. A plurality of all the same rotating rolls (25) are attached to each spindle (24) in a so-called skewered state. Then, the width dimension (W) of the adhesive sheet (M)
This is because even if the size changes, it can be dealt with successfully.

In this respect, in the figure, a push screw (28) is screwed in the radial direction of the rotating roll (25) so as to be able to move forward and backward so that the rotating roll (25) can be integrally rotated with the spindle (24). It is being pressed, the push screw (28) is loosened, the rotary roll (25) is slid horizontally and then the push screw (28) is retightened, and the mounting position of the rotary roll (25) Is regulated so that it can be adjusted.

However, as long as the mounting position of the rotary roll (25) on the support shaft (24) can be adjusted by the sliding operation of the rotary roll (25), the rotary roll (25) is rubbed against the adhesive sheet (M). As long as it can rotate by contact, the roll support shaft (24) can be attached to the device frame (21).
It may be fixedly installed on the rotating roll (25), and the rotating roll (25) may be loosely fitted on the rotating roll (25).

In any case, when a plurality of rotating rolls (25) are fitted onto each of the roll support shafts (24), as shown in the plan view of FIG. 7, the rotating rolls (25) are
Between the adjoining front and rear of the support shaft (24) so as to be in a so-called zigzag arrangement state as a whole, whereby the adhesive sheet (M) is not leaked to the whole and water described later is applied. Determined to be possible.

(29) is each roll support shaft (24)
A pair of support plates integrally projected from the device frame (21) to support both left and right ends of the device, and (30) is a support shaft receiving elongated hole formed in each of the support plates (29),
It has an elongated opening along the vertical direction. Similarly, (31) is an engaging cam piece that is also axially supported by each support plate (29), and as indicated by the chain line in FIG.
When rotated by 2), the roll support shaft (24) is lifted by the cam piece (31) along the elongated hole (30) so as to be retracted from the adhesive sheet (M). Therefore, unused rotating rolls (25)
Can be optionally withdrawn upward from the surface of the base paper (12) of the adhesive sheet (M).

On the other hand, reference numeral (33) in FIG. 5 is a pump installed in the center of the upper part of the cover case (23) in the apparatus frame (21), and (34) is the pump (3).
3) and the lower water storage tank (22) are connected to each other,
A water supply pipe line fixedly installed in the cover case (23), and a plurality of water discharge nozzles (35) oriented toward the circumferential surface of the rotating roll (25) are attached to the water supply pipe line. The water sucked up by the pump (33) from the water storage tank (22) can be dropped from the nozzle (35) to the rotary roll (25) in a drip state by an appropriate minute amount. (36) is a strainer attached to the lower end of the water supply pipe (34).

In that case, although not shown in detail, the water level in the water storage tank (22) is detected, and water can be appropriately replenished to the inside of the water storage tank (22) by the replenishment water conduit (37). It is preferable to set the amount of water to be pumped from the tank (22) to the nozzle (35) by a valve or the like so that it can be adjusted.

As described above, since water is dripped onto the rotating roll (25) from above, the water is transferred from the rotating roll (25) to the surface of the base paper (12) of the adhesive sheet (M). As a result, the rotation of the roll (25) results in getting wet in a water-wipe state. Moreover, since the plurality of rotating rolls (25) are axially suspended in parallel, water can be evenly and uniformly applied to the entire surface of the base paper (12).

Reference numeral (38) denotes a pair of left and right draining guides for preventing the water from wrapping around from the left and right ends of the pressure-sensitive adhesive sheet (M) to the back surface, and the frontmost rotation of the pressure-sensitive adhesive sheet (M) in the conveying direction. The roll (25) and the outlet of the device frame (21) are placed on the device frame (21) in an inward facing state in a C-shape in plan view where the width becomes gradually narrower toward the front. It is fixedly installed. As a result, the water is automatically pushed toward the central portion of the adhesive sheet (M), and the water draining action can be performed at the left and right end portions thereof.

It goes without saying that the draining guide (38) is made of an elastic material such as rubber or plastic and elastically contacts the surface of the base paper (12) of the adhesive sheet (M). In particular, as suggested from FIGS. 6 and 7, if it is determined that the inward overhanging length (L) and the inclination angle (θ) of pushing toward the central portion can be adjusted in size, the pressure-sensitive adhesive sheet (M It can be said that it is more and more effective in that even if the width dimension (W) of () changes in size, it can be dealt with without any trouble.

When the surface of the base paper (12) in the pressure-sensitive adhesive sheet (M) is wetted by the above-mentioned water-applying device (D), the pressure-sensitive adhesive (11) of the pressure-sensitive adhesive sheet (M) is attached to the wet portion. As a result of not wearing it, the so-called glue spring phenomenon is suppressed, and as a result, the blade die (16) of the die-cutting processing device (B).
Therefore, even if the pressure-sensitive adhesive sheet (M) is repeatedly die-cut, there is no risk of early reduction of the cutting ability of the blade edge portion or damage thereof. Regarding the amount of water added, it is necessary to consider the relationship with the viscosity of the adhesive (11) to be used and the amount of leaching, and to keep it in an appropriate minute amount according to this, but as a guideline Is good enough to spontaneously evaporate as soon as the die-cutting process is completed.

Further, since the static electricity and heat generated from the cutting edge portion are eliminated by applying the above-mentioned water content, the life can be remarkably improved and the positional deviation due to the inquiry between the cutting die (16) and the adhesive sheet (M). It is also possible to prevent such problems, and it is possible to obtain highly accurate punching and printing conditions.

Further, as a measure against the problem that the blade mold (16) rusts due to the addition of water, a cation activator, ammonia or the like is added to the water in the water storage tank (22) in a trace amount of a few percent. Can be prevented by alkalizing the water or using distilled water.

In particular, if soap, general household detergent, or other surfactant is dissolved in the water in the water storage tank (22) in an amount of 1 to 2%, the surface of the water may be dissolved by the surfactant. The tension is reduced and the base paper (12)
As a result, the printing ink and the masking sheet (20) can be prevented from being repelled as a result of being applied so as to form the water film evenly on the surface of the. In other words, not only the masking sheet (20) can be attached to protect the printing surface, but
Especially release paper (13) on adhesive sheet (M) after printing
It is possible to effectively suppress warp bending and stretching deformation. Although water has been described, it goes without saying that hot water instead of water may be added to the base paper (12) of the adhesive sheet (M) as water.

[0039]

[Effects of the Invention] As described above, according to the present invention, the base paper (12) is used.
Moisture is applied to the front surface of the base paper (12) during the transportation of the die-cutting pressure-sensitive adhesive sheet (M) formed by polymerizing and integrating the release paper (13) through the pressure-sensitive adhesive (11) on the back surface of the sheet. As the device (D), a plurality of rotating rolls (25) axially mounted in a parallel state before and after traversing the upper position of the raw paper (12) so as to rotate elastically in contact with the surface of the raw paper (12), A plurality of water discharge nozzles (35) fixedly piped above the rotating roll (25) so as to drip water onto the circumferential surface of the rotary roll (25), and located at the foremost side in the transport direction of the adhesive sheet (M). A pair of draining guides (38), which are located in front of the rotating roll (25) and face the left and right ends of the base paper (12) so as to elastically contact from above.
Since the water is dropped from the nozzle (35) by the rotating roll (25) so as to be imparted to the surface of the base paper (12) in a transition state, the prior art described at the beginning. It has the effect of completely solving the problem.

In other words, the present invention does not directly apply moisture to the cutting edge of the blade die (16) in the die-cutting machine (B), but conveys the adhesive sheet (M) to the die-cutting machine (B). In the process, the water is applied to the surface of the base paper (12) by the rotating roll (25). Therefore, during the manufacturing process of various printed materials or double-sided adhesive tape using the adhesive sheet (M) as a material, The moisture applying device (D) can be installed extremely easily and installed, and the mass production effect and versatility are remarkably excellent.

Water is dropped from the water discharge nozzle (35) onto the circumferential surface of the rotating roll (25) in a drip state, and the water is rotated by contact between the rotating roll (25) and the base paper (12). Since it is applied in a wiping state where it is transferred to the surface, the rotating rolls (25) are installed in parallel as a plurality of rolls.
Since the surface of 2) can be wetted with a uniform amount of water as a whole and an appropriate amount of water can be wetted, there is no fear of giving a resistance to the conveying action of the adhesive sheet (M).

Further, at the front position of the rotating roll (25) facing the frontmost side in the conveying direction of the adhesive sheet (M),
Since a pair of draining guides (38) elastically contacting the right and left ends of the base paper (12) from above are provided, the moisture imparted to the surface of the base paper (12) by the rotating roll (25) is prevented. Also, there is no possibility that the base paper (12) will inadvertently wrap around to the back surface from both left and right ends.

In this regard, if water should flow from the front surface to the back surface of the base paper (12), the blade die (1
In the next step of punching by 6), the blade die (1
When the receiving face plate of 6) is a so-called mount and is made of paper laid on the front surface of the metal base, the water spilled around on the back surface permeates the mount and the mount swells. As a result, even the release paper (13) of the adhesive sheet (M) is so deeply cut by the blade die (16) that the original role of the release paper (13) is lost. Such a problem can be completely prevented by the draining guide (38) of the present invention.

In particular, if the configuration of claim 2 is adopted,
Even if the width (W) of the adhesive sheet (M) changes,
Moisture can be applied to the entire surface without leaking, and the versatility of the water applicator (D) can be expected also from that point.

Further, if the configuration of claim 3 is adopted,
Since the rotary roll (25) can be retracted from the surface of the base paper (12) to a floating state, even if the moisture applying device (D) is incorporated in the manufacturing process of the above-mentioned printed matter or double-sided adhesive tape, this is It is also possible to use the printed matter or the double-sided adhesive tape only for printing without removing it from the manufacturing process and disassembling it. That is,
When the die-cutting process is not performed, the water-giving action before that is unnecessary, but at such time, the rotating roll (25) is operated to be lifted and kept in its unused retracted state. It can be said that it is extremely convenient for practical use.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a manufacturing process of a label (printed matter).

FIG. 2 is a plan view of the completed label.

3 is an enlarged cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is an explanatory diagram showing a manufacturing process of a double-sided adhesive tape (non-printed material).

FIG. 5 is a side sectional view showing a moisture applying device extracted during a manufacturing process.

FIG. 6 is a plan view of the moisture applying device.

FIG. 7 is a plan view of a modified example corresponding to FIG.

FIG. 8 is a partially enlarged side view showing a lifting operation state of a rotating roll.

FIG. 9 is a partially enlarged cross-sectional view showing an attached state of a rotating roll in an extracted manner.

[Explanation of symbols]

 (11) Adhesive (12) Base paper (13) Release paper (22) Water storage tank (24) Roll support shaft (25) Rotating roll (33) Pump (35) Water discharge nozzle (38) Draining guide (B) Die cutting Device (M) Adhesive sheet (D) Moisture applying device

Claims (3)

[Scope of utility model registration request] 1. A die-cutting pressure-sensitive adhesive sheet (M) formed by polymerizing and integrating a release paper (13) with a pressure-sensitive adhesive (11) on the back surface of the raw paper (12) while the base paper (M) is being conveyed. As a device (D) for applying moisture to the surface of 12),
2) A plurality of rotating rolls (25) axially mounted in a parallel state before and after traversing the upper position so as to rotate elastically in contact with the surface of (2), and the circumference of the rotating rolls (25). In front of a plurality of water discharge nozzles (35) fixedly piped in the upper position so as to drip water onto the surface, and a rotating roll (25) located at the frontmost side in the transport direction of the adhesive sheet (M). And a pair of draining guides (38) facing the left and right ends of the base paper (12) from above so as to elastically contact the nozzle (35).
A device for imparting moisture to a die-cutting pressure-sensitive adhesive sheet, characterized in that it is set such that the moisture dropped from the substrate is automatically imparted to the surface of the base paper (12) in a transfer state by a rotating roll (25). 2. A plurality of roll support shafts (24) are placed horizontally above and below the base paper (12) in a front-rear parallel state, and a plurality of rotary rolls ( 25) Sliding operation of the roll support shaft (25) and fitting the roll support shafts (24) between adjacent front and rear so as to be in a state of phase change in the overall staggered arrangement. Moisture adding device for adhesive sheet for die cutting. 3. A rotating roll (25) is provided by vertically arranging a plurality of rotating rolls (25) in a front-back parallel state above a base paper (12) and lifting the roll support shaft (24). 2. The apparatus for imparting moisture to a pressure-sensitive adhesive sheet for die-cutting processing according to claim 1, characterized in that it is set so as to be retracted upward from the surface of the base paper (12).