JP7582931B2 - Cutting method and cutting device - Google Patents

Description

The present invention relates to a half-cut cutting method in which a processing roll equipped with a cutting blade is pressed against a film running on a support means to make a linear incision of a fixed depth that does not penetrate the film in the thickness direction , thereby cutting the film up to the middle part in the thickness direction; and a half-cut cutting device in which the film is cut up to the middle part in the thickness direction is provided with a support means for supporting the running film, a processing roll equipped with a cutting blade that protrudes toward the support means and makes a linear incision of a fixed depth that does not penetrate the film in the thickness direction, and a processing roll support means for pressing the processing roll toward the support means.

Conventionally, in a pouch container using a resin film, a half-cut process has been applied to the film so that a user can open the pouch container by hand when removing the contents without using scissors or the like.
This half-cutting process is carried out by laser irradiation or processing with a roll blade (see Patent Document 1, etc.).

JP 2009-196075 A Patent No. 4468934

Half-cut processing involves making cuts in the thickness direction of a thin film without cutting the film, and the amount of cut is extremely small, ranging from a few μm to 60 μm.
If the cut is too shallow, the opening ability will be spoiled, and conversely, if the cut is too deep, there is a risk of damage during the manufacture of the pouch container or during transportation after filling, so it is necessary to set the cut amount accurately and process with a stable cut amount.
However, when using a roll blade, it is difficult to adjust the amount of cut into the film, and when using laser irradiation, there are problems in that a large amount of electricity is required for processing, and large-scale equipment is required.
In order to set the cutting amount with precision, a cutting device having a cutting blade consisting of a base portion having a rectangular or trapezoidal cross section and a cutting edge portion protruding from the base portion is known (see Patent Document 2, etc.).

In the technology described in Patent Document 2, the amount of cut is stabilized to a certain extent by the base abutting the film, but the pressing force applied to the film by the base changes due to slight deterioration in roundness and eccentric rotation of the processing roll and support roll.
In addition, since the processing roll and the support roll are in contact with each other at both ends and pressed, the pressure applied to the film by the base varies between the axial ends and the center due to the influence of the deflection of the processing roll and the support roll.
The thickness of the film at the cut section becomes slightly thinner as it is pressed by the processing roll, but if the pressing force fluctuates, the thickness of the film also fluctuates, and there was a problem that the amount of cut would not be constant even if the amount of protrusion of the blade tip was set accurately.

The present invention aims to solve the above problems by providing a cutting method and device that can accurately adjust the pressure applied to the film by the processing roll without being affected by loss of roundness or eccentric rotation, and can maintain a constant amount of cutting into the film, with a simple configuration.

The cutting method of the present invention is a half-cut cutting method in which a processing roll equipped with a cutting blade is pressed against a film running on a support means to make a linear cut of a constant depth that does not penetrate the film in the thickness direction , and the film is previously cut to the middle part in the thickness direction , wherein the processing roll is formed as a single unit including the cutting blade and is configured to be attached to a processing roll bearing, and has an abutment circumferential portion that abuts against the surface of the film, and the cutting blade is provided so as to protrude circumferentially from the abutment circumferential portion to a height of 60 μm or less toward the outer periphery, and when the processing roll is pressed against the film running on the support means, it is pressed horizontally against the film running on the film support means, and the moving end of the processing roll toward the support means is determined only by the abutment of the abutment circumferential portion against the film, thereby cutting in a linear manner to a constant depth equal to the height of the cutting blade, thereby solving the above problem.
In addition, the cutting device of the present invention is a cutting device for half-cut processing that cuts into the middle of the film in the thickness direction in advance, comprising a support means for supporting a running film, a processing roll equipped with a cutting blade that protrudes toward the support means and makes a linear cut of a constant depth that does not penetrate the film in the thickness direction , and a processing roll support means for pressing the processing roll toward the support means, wherein the processing roll is formed as a single unit including the cutting blade and configured to be attached to a processing roll bearing, and has an abutment circumferential portion for abutting against the film to linearly cut the moving end toward the support means to a constant depth equivalent to the height of the specified cutting blade, the cutting blade protruding from the abutment circumferential portion to a constant height of 60 μm or less in the circumferential direction on the outer periphery, the processing roll is provided in the width direction of the running film, the processing roll support means is provided corresponding to the processing roll and is equipped with a pressing force adjustment mechanism for adjusting the pressing force toward the support means, and the processing roll is configured to press the film running on the film support means from the horizontal direction, thereby solving the above problems.

According to the cutting method of claim 1, when the processing roll is pressed against the film running on the support means, it is pressed horizontally against the film running on the film support means, and the moving end of the processing roll toward the support means is determined only by the abutment of the abutment circumference with the film , and a linear cut is made to a constant depth equal to the height of the cutting blade.This makes it possible to accurately adjust the pressing force applied to the film by the processing roll without being affected by a decrease in roundness or eccentric rotation of the processing roll or support member, and without being affected by bending of the processing roll or support member, and makes it possible to maintain a constant amount of cutting into the film.
According to the configuration described in claim 2, multiple processing rolls are provided in the width direction of the running film, and the pressing forces of the multiple processing rolls are adjusted independently, making it possible to keep the amount of each cut constant even when multiple cuts are made simultaneously.
According to the configuration described in claim 3, a processing roll support means is provided corresponding to the processing roll, and the processing roll support means is supported by a width direction fixing means and fixed at any position in the width direction of the running film.By doing so, it is possible to accommodate films with different cut positions simply by changing the position of the processing roll support means, and easy adjustments can be made without replacing the processing roll.

According to the cutting device of claim 4, the processing roll is formed as a single unit including the cutting blade and is configured to be attached to the processing roll bearing, and has a contact circumferential portion that abuts against the film to determine the moving end toward the support means and cuts in a straight line to a constant depth equal to the height of the cutting blade, the cutting blade protrudes circumferentially from the contact circumferential portion to a height of 60 μm or less toward the outer periphery, the processing roll is provided in the width direction of the film along which it runs, the processing roll support means is provided corresponding to the processing roll and is equipped with a pressing force adjustment mechanism for adjusting the pressing force toward the support means, and the processing roll is configured to press the film running on the film support means from the horizontal direction, so that the pressing force applied by the processing roll to the film can be accurately adjusted without being affected by a decrease in roundness or eccentric rotation of the processing roll or support member, and without being affected by bending of the processing roll or support member, and the pressing force of the film by the processing roll can be maintained constant.
According to the configuration described in claim 5, a plurality of processing rolls are provided, and a plurality of processing roll support means are provided independently corresponding to the plurality of processing rolls. By adjusting the pressing forces of the plurality of processing rolls independently, the amount of cutting by the plurality of processing rolls can be kept arbitrary and constant, even when multiple cuts are made simultaneously.
According to the configuration described in claim 6, the processing roll support means is supported by the width direction fixing means and is configured to be able to be fixed at any position in the width direction of the running film, so that films with different cut positions can be accommodated simply by changing the position of the processing roll support means, making it possible to easily adjust without replacing the processing roll.

FIG. 2 is a front view of the cutting device according to the embodiment of the present invention; FIG. 2 is a side view of the cutting device according to the embodiment of the present invention. FIG. 2 is a perspective view of a processing roll of a cutting device according to an embodiment of the present invention; FIG. 4 is a cross-sectional explanatory view of a processing roll of a cutting device according to an embodiment of the present invention. FIG. FIG. 6 is an explanatory diagram showing the compression spring of FIG. 5 in a fully compressed state (with the processing roll removed); FIG. 7 is an explanatory diagram showing a state in which the compression spring of FIG. 6 is weakened;

As shown in Figures 1 and 2, the cutting device 100 of one embodiment of the present invention comprises a support roll 101, which is a support means for supporting the running film F, a processing roll 111 equipped with a cutting blade protruding toward the support roll 101, and a processing roll support means 110 for pressing the processing roll 111 toward the support roll 101.
As shown in Figures 3 and 4, the processing roll 111 has a contact circumferential portion 112 that contacts the film F to determine the moving end toward the support roll 101, and a cutting blade 113 is provided protruding from the contact circumferential portion 112 toward the outer periphery.
A plurality of processing rolls 111 (three in this embodiment) are provided in the width direction of the traveling film F, and processing roll support means 110 are independently provided corresponding to each processing roll 111 .

As shown in Figures 1 and 2, the processing roll support means 110 is supported by a width direction fixing frame 120, which is a width direction fixing means arranged parallel to the rotation axis of the support roll 101, and is configured to be movable and fixed to any position in the width direction by operating a fixing lever 117.
The processing roll support means 110 supports the processing roll 111 so that it can rotate and reciprocate in the direction of the support roll 101, and is configured so that the processing roll 111 can be pressed in the direction of the support roll 101 with a predetermined pressing force by a pressing force adjustment mechanism 114.
The processing roll support means 110 is configured so that the processing roll 111 can be replaced depending on the cutting depth and cutting shape required for the film F.

Explaining in more detail, as shown in Figures 5, 6 and 7, the processing roll support means 110 has a fixed base member 124, a oscillating base member 121 that is oscillatingly mounted on the fixed base member 124 around an oscillating axis 122, and a fixed frame portion 125 and a fixed lever 117 for supporting the fixed base member 124 on the width-direction fixed frame 120.
The processing roll 111 is rotatably mounted on a swingable base member 121 via a processing roll bearing 123 .
The oscillating base member 121 is configured to be pressed with a predetermined pressure in the direction of the support roll 101 by a pressing force adjustment mechanism 114 having an adjustment screw 116 , an adjustment base member 118 , and a pressing spring 115 .
The pressure is adjusted by rotating the adjustment screw knob 119 provided at the end of the adjustment screw 116 to move the adjustment base member 118 up and down, thereby changing the amount of compression of the pressure spring 115, as shown in Figures 6 and 7.

In this way, the processing roll 111 is pressed toward the support roll 101 by the pressure adjustment mechanism 114, and its moving end is determined only by the contact of the contact circumferential portion 112 with the film F. Therefore, by simply accurately setting the height at which the cutting blade 113 protrudes from the contact circumferential portion 112 to the outer periphery, it is possible to accurately maintain a predetermined pressure and keep the cutting amount of the film F constant without being affected by the effects of reduced roundness or eccentric rotation of the processing roll 111 or support roll 101, the effects of bending of the width direction fixed frame 120 or support roll 101, or changes in the posture of the processing roll support means 110.

In this embodiment, the cutting blade 113 is a circumferential blade parallel to the running direction of the film F, but it may be zigzag or wavy, may be formed parallel to the running direction or intermittently at a predetermined angle, and may be formed with two or more overlapping blades in the width direction of the film F.
In the present embodiment, the support roll 101 is the means for supporting the film F, but it may be a planar support means along which the film F slides.
In addition, although the present embodiment is illustrated as having three processing roll support means 110, the number of processing roll support means 110 may be any number, and one processing roll support means 110 may support multiple processing rolls 111 as long as the configuration is such that an appropriate pressing force can be applied to each processing roll 111.

100: Cutting device 101: Support roll (film supporting means)
REFERENCE SIGNS 110: Processing roll support means 111: Processing roll 112: Contact circumferential portion 113: Cutting blade 114: Pressing force adjustment mechanism 115: Pressing spring 116: Adjusting screw 117: Fixed lever 118: Adjusting base member 119: Adjusting screw knob 120: Width direction fixing frame (width direction fixing means)
121: Oscillating base member 122: Oscillating shaft 123: Processing roll bearing 124: Fixed base member 125: Fixed frame portion F: Film

Claims (6)

A half-cut processing method in which a processing roll equipped with a cutting blade is pressed against a film running on a film support means to make linear cuts of a certain depth that do not penetrate the film in the thickness direction, and the film is previously cut to the middle part in the thickness direction, comprising the steps of :
the processing roll is integrally formed with the cutting blade and is configured to be attached to a processing roll bearing, and has a contact circumferential portion that contacts the surface of the film,
The cutting blade is provided so as to protrude from the contact circumferential portion toward the outer circumferential side in a circumferential direction to a height of 60 μm or less ,
This cutting method is characterized in that, when pressing the processing roll against the film running on the support means, it presses the film running on the film support means from a horizontal direction, and the moving end of the processing roll toward the support means is determined only by the abutment of the abutment circumference with the film, cutting in a straight line to a constant depth equal to the height of the cutting blade. A plurality of the processing rolls are provided in the width direction of the traveling film,
2. The cutting method according to claim 1, wherein the pressing forces of the plurality of processing rolls are adjusted independently of each other. The cutting method according to claim 1 or 2, characterized in that the processing roll support means is supported by a width direction fixing means and fixed at any position in the width direction of the running film. A cutting device for half-cut processing, which cuts a film up to the middle in the thickness direction in advance, comprises a support means for supporting a traveling film, a processing roll having a cutting blade that protrudes toward the support means and cuts a linear cut of a certain depth into the film without penetrating the film in the thickness direction, and a processing roll support means for pressing the processing roll toward the support means,
the processing roll is configured to be integrally formed with the cutting blade and attached to a processing roll bearing, and has a contact circumferential portion that contacts the film to define an end of movement toward the support means and linearly cuts the film to a constant depth equivalent to the height of the cutting blade,
The cutting blade is provided so as to protrude from the contact circumferential portion toward the outer circumferential side in a circumferential direction to a height of 60 μm or less ,
The processing roll is provided in the width direction of the traveling film,
the processing roll support means is provided corresponding to the processing roll and includes a pressing force adjustment mechanism for adjusting a pressing force toward the support means;
A cutting device characterized in that the processing roll is configured to press the film running on the film support means in a horizontal direction. The cutting device according to claim 4, characterized in that a plurality of the processing rolls are provided, and a plurality of the processing roll support means are provided independently corresponding to the plurality of processing rolls. The cutting device according to claim 4 or 5, characterized in that the processing roll support means is supported by a width direction fixing means and can be fixed at any position in the width direction of the running film.

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