JP2775555B2 - Method for manufacturing stepped anvil roll of multi-layer sheet material processing apparatus using a pair of rolls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a multilayer sheet such as a composite sheet in which a sealing sheet is adhered onto a backing sheet between a pair of rolls, and more particularly to a die cut roll and an anvil roll. The present invention relates to a member of an apparatus for producing a combined ring-shaped perforated seal, and more particularly to a method for producing a projection on an anvil roll receiving a blade on a die cut roll.

[0002]

BACKGROUND OF THE INVENTION In the case of cutting a multilayer sheet in which one or more layers of a sealing backing coated with a pressure-sensitive adhesive on a backing sheet are adhered on a backing sheet, the multilayer sheet is formed according to a desired seal shape. Cut all layers (full cut)
There is a part and a part that cuts only a part of the layer (half cut). Throughout this specification, cutting through all layers of such a multilayer sheet is called "full cut", and cutting only a part of the upper layer is called "half cut". Cutting of such a multilayer sheet is usually performed by passing the sheet between an upper roll provided with a blade and an anvil roll which rotates while engaging with the upper roll. A convex portion facing the blade is provided on the anvil roll.

[0003]

2. Description of the Related Art Conventionally, in order to form a convex portion on an anvil roll facing a blade on an upper roll, a method of forming the convex portion by etching or separately forming a convex portion and embedding the convex portion in an anvil roll with a screw is used. According to Further, instead of forming the convex portion, a groove adapted to the blade shape was provided on the anvil roll surface by cutting.

[0004]

In the processing of a convex portion on an anvil roll, there is a problem that a uniform etched surface having the same depth cannot be obtained by corrosion. Further, when the convex portion is embedded with a screw, distortion occurs due to quenching or the like, and there is an inconvenience that a gap is formed between the convex portion and the roll surface. When a groove is provided on the anvil roll, it is difficult to form a groove with a uniform depth due to milling accuracy, wear of a cutting tool, and the like. Accordingly, it is an object of the present invention to provide a method for forming a high-precision convex portion on a corresponding anvil roll in order to obtain a blade having no error on a die cut roll.

[0005]

According to the present invention, in order to form a convex portion on an anvil roll, a sheet plate is stretched on the anvil roll surface, and the sheet plate is cut out and cut out according to the shape of the convex portion to be obtained. Removed part, then apply hard plating to the cut out part to form a build-up,
After the plating step, the sheet plate is removed, and the overlaid portion thus formed is polished to form a projection having a predetermined dimension. Solved the problem.

[0006] The cutting edge of the blade 4 for full cutting of the blade on the upper roll manufactured by the method of the present invention has a convex portion of the anvil roll 2 as the upper roll and the anvil roll engage with each other and rotate. 6 against the top. When a multi-layer sheet for sealing is supplied between the two rolls, a full-cut blade 4 is cut into the multi-layer sheet overlying the convex portion 6 and cut through all layers of the sheet. Since the portion of the sheet that does not overlap with the convex portion 6 becomes lower in height, the half-cutting blade 5 cuts in the thickness of the upper layer of the sheet, but does not reach the lower layer. It doesn't matter. From the sheet thus processed, a seal having a desired shape is peeled off along the half-cut line and used.

The die cut roll of the apparatus manufactured by the method of the present invention is formed by using a pair of cylindrical upper roll 1 and anvil roll 2 as shown in FIG. Both rolls have raised end portions 7 and 8 in the shape of a bank, and the substantial roll surfaces 9 and 10 are configured to be depressed inward from this. Both rolls have ends 7, 8 engaged with each other and a shaft 11,
Rotating in opposite directions about 12.

FIG. 1 is a sectional view showing a state where both rolls are engaged. The blade 3 is provided on the roll surface 9 of the upper roll 1 so as to project in the radial direction. The blades 3 are all at the same height, and the blade edges are aligned on the same circumferential surface around the axis of the upper roll. On the roll surface of the anvil roll 2, a convex portion 6 having an upper surface extending on the same circumferential surface around the axis of the anvil roll is formed at a position where the cutting edge of the full-cut blade 4 abuts. The position of the cutting edge of the blade is determined so as not to hit it. Here, a die cut roll for making a ring-shaped perforated seal using a multilayer sheet is shown. As the multilayer sheet, a sheet obtained by applying a pressure-sensitive adhesive on the back surface and adhering an upper paper sheet serving as a seal on the backing paper is used. The multilayer sheet may be made of paper, plastic, or metal thin film.

The blade 4 for full cutting has a circular blade shape,
The half-cutting blade 5 has a cutting edge provided concentrically with the cutting edge of the full-cutting blade 4 on the outside thereof, and is a blade 3 made of a combination of the full-cutting blade and the half-cutting blade.
Are provided on a plurality of upper rolls 1. FIG. 1 shows only one of the above combinations in an enlarged form. A plurality of protrusions 6 are provided on the anvil roll 2 so as to abut only on the full-cut blade 4 when the roll rotates. When the multi-layer sheet is supplied between the upper roll and the anvil roll, as both rolls rotate, a hole is formed in the sheet at the center by full cut, and only the upper paper is cut along the outer periphery by half cut. A ring-shaped perforated seal is formed, which can be peeled off from the backing paper and used.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to form a projection 6 on an anvil roll 2 according to the present invention, a method comprising the following steps is performed. A sheet plate having a thickness at least equal to the height of the projection 6 to be formed is stretched on the anvil roll surface.

The sheet plate is cut out according to the shape of the projection 6 to be formed on the anvil roll surface, and the cut-out portion is removed. Hard chrome plating is applied to the cut-out portion of the sheet plate to form a build-up. After the plating process, the sheet plate is removed. The overlaid portion formed on the anvil roll in this manner is polished to form a projection having a predetermined size. A lead plate, another metal plate, a resin plate, or the like can be used as the sheet plate.

[0012]

According to the method of forming a convex portion on an anvil roll by plating according to the present invention, the precision of the convex portion processing has been remarkably improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a corresponding positional relationship between a blade of an upper roll and a convex portion of an anvil roll manufactured by a method of the present invention.

FIG. 2 is a partial cross-sectional view showing a processing state of a multilayer sheet in an apparatus manufactured by the method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 upper roll 2 anvil roll 3 blade 4 blade for full cut 5 blade for half cut 6 convex part

Claims (3)

(57) [Claims] 1. An upper roll (1) and an anvil roll (2), which can rotate by engaging with each other, and the upper roll (1) is provided with a blade (3) on its surface. The anvil roll (2) is provided on its surface with a convex portion (6) protruding in the radial direction facing the blade, and when the two rolls rotate with the multilayer sheet in between, the blade (3) causes An apparatus for processing a multilayer sheet material capable of processing so that the multilayer sheet is cut in all layers on the protrusions (6) and only a part of the layers of the multilayer sheet is cut in areas other than the protrusions (6). A step of stretching a sheet plate having a thickness at least equal to the height of the convex portion (6) on the anvil roll surface, and forming the sheet plate on the anvil roll surface. Convex part (6)
Cutting out the sheet plate according to the shape of the sheet plate, removing the cut-out portion, and performing hard chrome plating on the cut-out portion of the sheet plate to form a build-up, after the plating process step, A method for manufacturing a stepped anvil roll, comprising: a step of removing the sheet plate; and a step of polishing a built-up portion formed on the anvil roll to form a projection having a predetermined size. 2. A sheet plate is lead plate, a manufacturing method of claim 1 step with anvil roll according. 3. A sheet plate is a resin plate, a manufacturing method of claim 1 step with anvil roll according.