JPS633801Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for melt-cutting adhesive sheets such as labels or stickers.

(Prior Art) Conventionally, adhesive sheets are known in which an adhesive layer is laminated on a base sheet through a release layer and an adhesive layer, and the adhesive layer is partially laminated on one side of a base film. Laminated pattern layers. The adhesive layer is removable from the base sheet together with the adhesive layer, but in order to create a label or a sticker in which the adhesive layer is peeled off only in correspondence with the pattern layer, the base film is removed along the contour of the pattern layer. A cut separation groove must be formed. However, during this cutting, it is necessary to cut only the adhesive layer and not the base sheet. This is because if the base sheet is cut together, the cut pieces will be separated from the adhesive sheet along with a portion of the base sheet.

In order to solve the above-mentioned problems, the applicant of the present application proposed a device described in Japanese Patent Publication No. 53-33400. This conventional device fuses and cuts only the base film using a roll equipped with a rounded cutting blade at the tip.

In the conventional fusing blades, blades that follow the outline of the pattern are either implanted on the roll surface or cut out by machining.

(Problems to be solved by the invention) In the device in which the blade is implanted, the steel plate or the like is bent to form the cutting blade in a shape that follows the outline of the pattern layer.
It is impossible to form a shape that follows a fine and precise pattern, and as a result, there are restrictions on the design of the pattern layer displayed on the adhesive layer.

In addition, the temperature of the blade, especially at the cutting edge, may be slightly different due to differences in the material of the surface part and the material of the blade, or gaps in the fixed part of the part where the blade is planted on the surface part, etc., and the temperature of the entire plate surface may be slightly different. There are drawbacks such as a difference in height occurring locally, resulting in uneven fusing and cutting, making it impossible to obtain a good adhesive sheet due to uniform fusing.

Furthermore, in the case where the blade is embedded, it is difficult to make the height of the blade edge uniform, and there is a problem that uneven cutting occurs.

On the other hand, with those that are cut by machining, it is difficult to uniformly process the minute width of the blade, and ultra-precision machining is required, resulting in an extremely high cost.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an adhesive sheet fusing device that solves the above-mentioned problems and can obtain a highly accurate fusing blade at low cost.

(Means for solving the problems) In order to solve the above problems, the present invention takes the following measures. In other words, the features of this invention are:
An adhesive sheet consisting of a base sheet and a base film pasted on the base sheet is cut by a heated fusing blade with a non-sharp tip, without cutting the base sheet. In the sheet fusing device, the fusing device has a surface portion disposed on the surface side of the base film, and the surface portion includes a corroded portion that is dented due to corrosion and a non-corroded portion that remains without being corroded. The non-corroded part is used as the fusing blade, and the step between the tip of the fusing blade and the surface of the corroded part is such that when the tip of the fusing blade reaches the base sheet, there is a gap between the surface of the corroded part and the surface of the base film. The height is such that a predetermined gap is formed.

(Function) According to the present invention, when cutting the base film on the base sheet, the fusing blade formed on the surface of the fusing device is pressed so as to pass through the base film and reach the base sheet. At this time, since the fusing blade is heated, the base sheet is fused and cut by the fusing blade, and the tip of the fusing blade comes into contact with the base sheet, but since the tip of the fusing blade is not sharp, ,
There is no need to cut even the base sheet.

Since the fusing blade is integrally molded from the surface portion, heat transfer is more uniform and the height of the blade is also uniform compared to a blade that is implanted, thereby making uniform fusing possible.

Furthermore, since the height of the fusing blade is greater than the thickness of the base sheet, the corroded portion will not come into contact with the base sheet, and unnecessary portions will not be cut by fusing.

In the present invention, the fusing blade provided on the surface of the fusing device is integrally formed on the surface as a protrusion that forms the outline of the pattern layer by corroding the surface. Since the fusing blade is formed by such corrosion, it is easy to form a fine and precise shape, and it is also easy to manufacture and low cost.

Moreover, since the fusing blade is formed by corrosion,
It becomes extremely easy to make the tip non-sharpened.

(Example) Before explaining the device of the present invention, a preferred example of the adhesive sheet will be described below.
The base sheet 1 is made of paper or plastic sheet, and an adhesive layer 3 is laminated on one side with a release layer 2 made of a release agent interposed therebetween. The adhesive layer 3 is the peeling layer 2
an adhesive layer 4 made of a pressure sensitive adhesive or hot melt partially laminated thereon; a base film 5 made of a plastic film continuously laminated on the adhesive layer 4; layer 4
A pattern layer 6 is partially printed and laminated at a position corresponding to the pattern layer 6, and a separation groove 7 is formed in the base film 5 corresponding to the outline of the pattern layer 6.
Therefore, the part of the adhesive layer 3 surrounded by the separation groove 7 is used as a label 8, and the label 8 is removable from the base sheet 1, and when the adhesive layer 4 is a pressure-sensitive adhesive, it can be attached as is. When the adhesive layer 4 is a hot melt, the label 8 is heated and pressed to be adhered to the adherend.

FIGS. 2 to 4 show the manufacturing process of the adhesive sheet, and FIGS. 3 and 4 show an embodiment of the fusing device of the present invention used during this process. First, as shown in the second figure, the base sheet 1 is already coated with a release layer 2, and is rolled onto rolls 9,1.
Transferred between 0 and 0. In the illustrated example, a pair of film transport devices A and B are provided with this base sheet 1 in between.
Although the base films 5, 5 are shown laminated on both sides of the sheet 1, it is of course possible to laminate the film 5 on one side of the sheet 1 using only one device A. The base film 5 is continuously fed out by a feeding roller 11, passes through one or more printing machines 12 and 13, and the pattern layer 6 is partially formed on one surface by monochrome or multicolor printing. Subsequently, the base film 5 passes through an adhesive applicator 14, and an adhesive layer 4 is formed on the other side corresponding to the pattern layer 6. This adhesive layer 4 is formed by printing and coating an adhesive using the coating machine 14 using a gravure printing method, and the base film 5 is transferred from the printing machines 12 and 13 to the adhesive coating machine 14 as a continuous film. Since the pattern layer 6 and the adhesive layer 4 are transferred, the pattern layer 6 and the adhesive layer 4 are accurately formed at a predetermined position without any positional deviation or the like.

Furthermore, the base film 5 is transferred to the pressure roll 1
Between 5 and 15, the adhesive layer 4 is sent together with the base sheet 1.
The film 5 is laminated onto the base sheet 1 through the wafer, and the polymerized base film 5 and base sheet 1 are then formed with the separation grooves 7 between the fusing devices 16 and 16, and then rolled onto the take-up roll 10. It is wound up. The fusing device is, for example, a roll made of a magnesium cylinder as shown in the third figure, and is provided with a fusing blade 17 on the surface portion 20 which becomes the plate surface. The fusing blade 17 is integrally formed on the surface portion 20 as a protrusion forming the outline of the pattern layer 6 by corroding the surface portion 20 with a chemical or the like. That is, the surface portion 20 consists of a corroded portion formed into a dent due to corrosion and a non-corroded portion that remains without being corroded, and the non-corroded portion serves as the fusing blade 17. The level difference between the tip of the fusing blade 17 and the surface of the corroded portion is set to such a height that a predetermined gap is formed between the surface of the corroded portion and the surface of the base film 5 when the tip of the fusing blade 17 reaches the base sheet 1. . Further, a heater 21 with a thermostat for heating the fusing blade 17 is built in the fusing devices 16, 16, and the base film 5 passing between the fusing devices 16, 16 is heated along the outline of the pattern layer 6. The separation groove 7 is formed by the fusing blade 17 along the line, and in this case as well, since the base film 5 is transferred from the printing machines 12 and 13 as a continuous film, the separation groove 7 may be misaligned. The pattern layer 6 is formed accurately along the contour without any distortion. In addition, it can be formed not only in a roll but also in a planar shape,
It is possible to form a fusing blade on the surface of the planar plate, and in this case, the laminated base film 5
The adhesive layer can be removed by intermittently feeding a continuous body of the base sheet 1 and moving the fusing device with a piston in synchronization with this, and unlike conventional cutting blades, the present invention uses a fusing cutting blade. A feature of the present invention is that the base film 5 is fused and cut by the cutter 17.

In addition, as described above, the surface portion 20 is corroded and the fusing blade 1
7, the cutting edge 18 of the fusing blade 17 is
It should have a rounded shape or a non-pointed shape such as a trapezoidal cross section.

When manufacturing an adhesive sheet using the apparatus described above in detail, each step is shown in an enlarged manner. As shown in FIG. Then, as shown in the figure, an adhesive layer 4 is formed on the other surface of the base film 5 in correspondence with the pattern layer 6 by the adhesive applicator 14. The base film 5 having the pattern layer 6 and the adhesive layer 4 is then applied to both sides of the base sheet 1 in pairs with the adhesive layer 4 interposed therebetween by the pressure rolls 15, 15 as shown in the figure. are polymerized and bonded, and then, as shown in the figure, separation grooves 7 are formed in the base film 5 by the fusing blades 17 of the fusing devices 16, 16. At this time, if the cutting edge 18 of the fusing blade 17 is made non-sharp, even if the fusing blade 17 bites slightly deeply and pressurizes the base sheet 1, the cutting edge 18 will only press the base sheet 1. The separation groove 7 is formed by only the base film 5 being cut by heat without being thermally cut.

One example of the adhesive sheet to which the device of the present invention is applied is as described above, but the following example is suitable for the pattern layer 6 and the adhesive layer 4 that are partially formed on the base film 5. That is, FIG. 5 shows the first embodiment, in which the adhesive layer 4 has a wider area than the pattern layer 6 and is formed on the base film 5, and the separation groove 7 is formed along the outline of the pattern layer 6. According to this aspect, even if the pattern layer 6 and the adhesive layer 4 are formed with a misalignment, the label 8 peeled off from the base sheet 1
It is possible to provide the adhesive layer 4 reliably formed on the entire surface.

FIG. 6 shows a second embodiment of the adhesive sheet, in which the adhesive layer 4 is formed to have a generally larger area than the pattern layer 6, but there is a part of the periphery of the pattern layer 6 that does not have the adhesive layer 4. are formed, and a separation groove 7 is formed along the contour of the pattern layer 6. Therefore, the label 8 to be peeled off via the separation groove 7 constitutes a tongue portion 19 having no adhesive layer 4 on the base film 5, and by holding the tongue portion 19, the label can be removed. 8 can be easily peeled off from the base sheet 1.

FIG. 7 shows a third embodiment of the adhesive sheet, in which the adhesive layer 4 is formed to have a smaller area overall than the pattern layer 6. In this case, since the entire periphery of the label 8 to be peeled is the tongue portion 19, it is easy to peel the label 8 from the base sheet 1, and the adhesive necessary for the adhesive layer 4 is removed. It has the advantage that a minimum amount is sufficient.

FIG. 8 shows a fourth embodiment of the adhesive sheet, in which the adhesive layer 4 is formed to have a smaller area overall than the pattern layer 6, and has a striped shape as shown in the figure, a lattice shape, a dot shape, etc. It is formed from a collection of small dispersed adhesive layers. Further, FIG. 9 shows a fifth embodiment of the adhesive sheet, in which the adhesive layer 4 is formed to have a larger area overall than the pattern layer 6, and is formed from a collection of dispersed small adhesive layer groups similar to the above. It is formed. According to this embodiment, the amount of adhesive required for the adhesive layer 4 can be further reduced.

(Effect of the invention) As a result of the above-described structure of the present invention, the fusing blade 17 provided on the surface portion 20 of the fusing device 16 forms a protrusion forming the outline of the pattern layer 6 by corroding the surface portion 20. Since it is formed integrally with the surface portion 20 as a strip, and is formed by such corrosion, the fusing blade 17 is easy to manufacture at low cost, and the fusing blade 17 can be formed into a fine and precise shape. Therefore, the design of the pattern layer 6 displayed on the adhesive layer 3 of the adhesive sheet can also be configured freely. Moreover, in this invention, the fusing blade 17
Since it is made of the same material as the surface part 20 of the fusing device and is constructed as one body, the temperature of the fusing blade, especially the cutting edge part, is guaranteed to be the same at each part of the plate surface, and there is no unevenness in fusing due to temperature unevenness. Therefore, a good adhesive sheet can be manufactured.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an adhesive sheet targeted by the device of the present invention, Fig. 2 is an explanatory diagram showing an apparatus for manufacturing the adhesive sheet, and Fig. 3 is an embodiment of the fusing device according to the invention. 4 is a front view, FIG. 4 is a sectional view showing each process of manufacturing the adhesive sheet, FIG. 5 is a plan view showing the first embodiment of the adhesive sheet, and FIG. 6 is a plan view showing the second embodiment of the adhesive sheet. Figure 6 is a sectional view taken along line - in Figure 6, Figure 7 is a plan view showing the third aspect, Figure 8 is a plan view showing the fourth aspect, and Figure 8 is a - line sectional view in Figure 8. Line sectional view, Figure 9 is the same as Figure 5.
It is a top view showing an aspect. DESCRIPTION OF SYMBOLS 1... Base sheet, 2... Peeling layer, 3... Adhesive layer, 4... Adhesive layer, 5... Base film, 6...
Pattern layer, 7... Separation groove, 16... Fusing device, 17
... Fusing blade, 18 ... Cutting edge, 20 ... Surface portion.

Claims (1)

[Claims for Utility Model Registration] An adhesive sheet consisting of a base sheet and a base film pasted on the base sheet is cut by a heated fusing blade with a non-sharp tip without cutting the base sheet. In an adhesive sheet fusing device for fusing a base film, the fusing device has a surface portion disposed on the surface side of the base film, and the surface portion includes a corroded portion formed into a dent due to corrosion, and The non-corroded part is used as the fusing blade, and the step between the tip of the fusing blade and the surface of the corroded part is such that when the tip of the fusing blade reaches the base sheet, the corroded part 1. A fusing and cutting device for adhesive sheets, characterized in that the height is such that a predetermined gap is formed between the surface and the surface of the base film.