JPH06155370A - Cutting of adheive tape roll - Google Patents

Abstract

PURPOSE:To provide a highly safe cutting method of an adhesive tape roll, by which no damage is caused by friction by cutting the adhesive tape roll, for which an adhesive tape layer is formed on the outer periphery of a paper core layer, at different cutting angles of a cutting blade between the paper core layer and the adhesive tape layer. CONSTITUTION:A cutting blade 4 is adjusted at a cutting angle of theta1 in relation to a roll surface 5 when an adhesive tape roll 3 is to be cut, and an adhesive tape layer 1 is thus cut. As the cutting blade 4 is tilted by 5 deg. relative to a cutting surface 6, a relief of the cutting blade 4 at the time of cutting the adhesive tape layer 1 is prevented, and the adhesive tape layer 1 is cut perpendicular to the roll surface 5. The cutting angle of the cutting blade 4 is changed to a cutting angle of theta2 which is suitable to cutting of a paper core layer 2, at the same time as the cutting of the adhesive tape layer 1. Namely, the paper core layer 2 is cut perpendicular to the roll surface 5, while the cutting angles theta1, theta2 of the cutting blades 4 are changed in cases of the adhesive tape layer 1 and the paper core layer 2. The adhesive tape layer 1 and the paper core layer 2 can thus be cut perpendicular to the roll surface. Safe cutting is carried out without deviation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting an adhesive tape roll.

[0002]

2. Description of the Related Art Conventionally, an adhesive tape is longly wound around a wide paper core which is a winding core, and is formed into a so-called adhesive tape roll, which is then cut into a small-width-sized product by a tape cutting machine. It is said that. A fixed blade or a rotary blade is generally used as a cutting blade for cutting the adhesive tape roll having the adhesive tape layer formed on the outer periphery of the paper core layer into a predetermined width. By the way, as shown in FIG. 3, when the adhesive tape roll 11 is cut by sending out the cutting blade 13 from the direction perpendicular to the roll surface 12 of the adhesive tape roll 11 (cutting angle θ = 90 degrees), As shown in, since the cutting surface B of the adhesive tape layer 14 has a small resistance, the cutting blade 13 escapes in the X direction when the adhesive tape layer 14 is cut, and the cutting surface A of the adhesive tape layer 14 has a convex shape. The cut surface B is formed in a concave shape, and the cut surface B of the cut adhesive tape layer 14 is displaced S
May occur. In order to prevent the deviation S at the time of cutting the adhesive tape layer 14, as shown in FIG.
3 is inclined with respect to the cutting surface F of the adhesive tape roll 11, and the inclination angle φ is 5 to 10 degrees, in other words, the cutting angle θ.
Was set to about 85 to 80 degrees and the adhesive tape roll 11 was cut. In this case, the paper core layer 15 has a large resistance to the cut surface D, and the cutting blade 13 does not escape in the X direction. Therefore, the paper core layer 15 is cut perpendicularly to the roll surface 12.

[0003]

By the way, the cutting angle θ has a unique cutting angle depending on the type of the cutting blade 13, the cutting width of the adhesive tape roll 11, the hardness of the adhesive tape roll 11, etc. The adhesive tape roll 11 was cut at the most suitable specific cutting angle. However, since the adhesive tape layer 14 and the paper core layer 15 have different hardnesses, when the adhesive tape layer 14 is cut at a cutting angle θ suitable for cutting the adhesive tape layer 14, for example, a cutting angle θ such as 85 degrees.
No. 4 is cut perpendicularly to the roll surface 12, and the deviation S at the time of cutting does not occur, but the paper core layer 15 is harder than the adhesive tape layer 14 and the resistance of the cut surface D is large, as shown in FIG. Therefore, the cutting is performed in a state of being inclined in the same angle as the cutting angle θ, a deviation L called a so-called mountain cutting 20 is generated, and a sharp annular protrusion 21 is formed on the paper core layer 15. The deviation L increased as the thickness of the paper core layer 15 increased. For this reason, there is a problem that the safety of the worker is threatened by the sharp ridge portion 21 formed on the paper core layer 15. In addition, there are problems that scratches are generated due to friction between cut products and that the printing ink on the printing wrapping paper falls off and the printing printed on the products becomes unclear.

The present invention has been made in view of the above problems, and solves the above problems and does not cause sharp cuts in the adhesive tape roll, does not cause scratches due to friction, and is highly safe. The purpose is to provide a cutting method.

[0005]

A method of cutting an adhesive tape roll according to the present invention is a method of cutting an adhesive tape roll having an adhesive tape layer formed on the outer periphery of a paper core layer with a cutting blade between the paper core layer and the adhesive tape layer. It is characterized by changing the cutting angle and cutting.

In the present invention, a fluid pressure cylinder or the like can be preferably used as a means for changing the cutting angle of the cutting blade between the paper core layer and the adhesive tape layer.

[0007]

In the method of cutting an adhesive tape roll of the present invention, the adhesive tape roll having the adhesive tape layer formed on the outer periphery of the paper core layer is changed by changing the cutting angle of the cutting blade between the paper core layer and the adhesive tape layer. Since the cutting is performed, the paper core layer and the adhesive tape layer are cut at the optimum cutting angles of the cutting blades. As a result, the adhesive tape roll can be safely cut without producing a sharp cut end and without causing a deviation.

[0008]

Embodiments of the present invention will be described with reference to the drawings. 1 and 2 are drawings of an embodiment of a method for cutting an adhesive tape roll of the present invention, FIG. 1 is a sectional view showing a state in which an adhesive tape layer is cut, and FIG. 2 is a paper core layer cut It is sectional drawing which showed the state which is doing. 1 and 2, 1 is an adhesive tape layer, 2 is a paper core layer, and 3 is an adhesive tape roll composed of the adhesive tape layer 1 and the paper core layer 2. 4 is a cutting blade, and 5 is a roll surface of the adhesive tape roll 3. θ
₁ is the cutting angle of the cutting blade 4 when cutting the adhesive tape layer 1, and θ ₂ is the cutting angle of the cutting blade 4 when cutting the paper core layer 2. For example, in this example, θ ₁ = 85 degrees, θ ₂ = 9
It is set to 0 degrees. The cutting angles θ ₁ , θ
₂ is the type of cutting blade 4, the cutting width of the adhesive tape roll 3,
The most suitable cutting angle is selected according to the hardness of the adhesive tape layer 1 and the paper core layer 2.

The adhesive tape roll 3 is cut as follows. The cutting blade 4 is adjusted to have a cutting angle of θ ₁ with respect to the roll surface (for example, 85 degrees in this example), and the cutting blade 4 is pressed downward to cut the adhesive tape layer 1. At this time, the cutting blade 4 is inclined at an angle of 5 degrees with respect to the cutting surface 6, so that the cutting blade 4 is prevented from escaping in the X direction when the adhesive tape layer 1 is cut. As a result, the adhesive tape layer 1 is cut perpendicularly to the roll surface 5. Simultaneously with the completion of the cutting of the adhesive tape layer 1, an air cylinder (not shown) is operated so that the cutting angle of the cutting blade 4 is θ ₂ suitable for cutting the paper core layer 2 (for example, 90 ° in this example, in this case, the cutting surface). 7
The inclination with respect to becomes 0 degree). The completion of cutting the adhesive tape layer 1 is confirmed by checking the thickness of the adhesive tape layer 1 in advance and setting the thickness, and cutting when the cutting blade 4 reaches the thickness of the adhesive tape layer 1 after the start of cutting. Can be carried out by a method such as deciding that it has been completed. As a result, the paper core layer 2 is cut perpendicularly to the roll surface 5. As described above, since the adhesive tape layer 1 and the paper core layer ₂ are cut by changing the cutting angles θ ₁ and θ ₂ of the cutting blade 4,
The adhesive tape layer 1 and the paper core layer 2 can be cut perpendicularly to the roll surface, and the adhesive tape layer 1 can be cut into uneven shapes or the paper core layer 2 can be cut like the conventional cutting method. Cuts and cuts will not occur.

[0010]

According to the method of cutting an adhesive tape roll of the present invention, an adhesive tape roll having an adhesive tape layer formed on the outer periphery of a paper core layer is cut at a cutting angle of a cutting blade between the paper core layer and the adhesive tape layer. Since the paper core layer and the adhesive tape layer are cut differently, the paper core layer and the adhesive tape layer can be cut at the optimum cutting angles of the cutting blades. As a result, the adhesive tape roll can be safely cut without generating a sharp cut and without causing a shift. In addition, since there are no sharp cuts or deviations in the adhesive tape roll, it is possible to improve safety and prevent the occurrence of scratches due to friction between products caused by misalignment of cuts and the loss of printing ink on printing packaging paper. You can

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an adhesive tape layer is cut in an embodiment of a method for cutting an adhesive tape roll of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the paper core layer is cut in the embodiment of FIG.

FIG. 3 is a cross-sectional view showing a conventional method for cutting an adhesive tape roll.

FIG. 4 is a cross-sectional view showing a state in which an adhesive tape layer is cut in a conventional cutting method.

FIG. 5 is a cross-sectional view showing another conventional method for cutting an adhesive tape roll.

FIG. 6 is a cross-sectional view showing a state after cutting a conventional adhesive tape roll.

[Explanation of symbols]

 1 Adhesive tape layer 2 Paper core layer 3 Adhesive tape roll 4 Cutting blade 5 Roll surface

Claims (1)

[Claims] 1. An adhesive tape roll, wherein an adhesive tape roll having an adhesive tape layer formed on the outer periphery of a paper core layer is cut by changing the cutting angle of a cutting blade between the paper core layer and the adhesive tape layer. Cutting method.