JP3089028B2 - Cutting method of thin film roll - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for cutting a thin film roll, and more particularly, to a hard roll and / or a thick roll wound around a kraft paper core by a winder. The present invention relates to a method for cutting a thin film roll which can cut the thin film roll into a plurality of rolls having a desired width without breaking the shape of the end face of the cut portion.

[Prior Art] Conventionally, in order to cut a thin film roll into a plurality of rolls having a desired width, both ends of a core of the thin film roll placed on two support rolls are fixed by a chuck mechanism and rotated. The cutting was performed by pressing the cutting blade against the rotating thin film roll. The rotation of the roller may be performed by using a chuck mechanism as a drive source (center drive system) or using a support roll as a drive source (so-called surface drive system).

[Problems to be Solved by the Invention] However, in the above-described technology, since the inside of the core is a cavity, the core is crushed by pressing by the cutting blade at the time of cutting, and the thin film roll and the cut portion of the core are cut. There was a drawback that the shape collapsed.

In order to solve this drawback, it is conceivable to increase the cutting performance of the cutting blade by increasing the rotation speed of the thin film roll, but when the thin film is made of synthetic resin, the cut end face is welded. It cannot be adopted.

Therefore, the present applicant previously disclosed in Japanese Patent Application No. 1-190318, after inserting a blade receiving portion having a lower hardness than the cutting blade inside the cut portion of the core cut along with the thin film by the cutting blade,
By cutting, even if the rotation speed is low, a technique capable of cutting without crushing the core has been proposed.

The present applicant has further researched on the above-mentioned prior art. In the case where the thin film roll to be cut is hardly wound (so-called hard winding) or has a large diameter (so-called thick winding) It is necessary to use a high-strength blade with a large blade thickness for cutting, but when a thin or thick roll of thin-film material is cut by a thick blade, the blade easily escapes, and the cutting section It has been found that the end face may be tapered or ring-shaped.

[Object of the Invention] Accordingly, an object of the present invention is to provide a thin film roll that can be cut into a plurality of thin films having a desired width without breaking the shape of the cut portion even if the thin film roll has a hard roll and / or a thick roll. It is to provide a cutting method.

[Means for Solving the Problems] The present inventors have conducted intensive studies in order to achieve the above object, and as a result, have reached the present invention.

That is, the method for cutting a thin film roll according to the present invention is a thin film that cuts a thin film roll wound around a cylindrical core into a plurality of pieces having a desired width by pressing a cutting blade in a rotated state. In the method of cutting the body roll, a blade receiving portion having a lower hardness than the cutting blade is inserted inside the core of the rotating thin film body roll so as to be in contact with an inner peripheral surface of a portion to be cut together with the thin film body. The cutting blade comprises a first cutting blade comprising a saw blade for roughly cutting the thin film roll, and a second cutting blade comprising a cutting blade for finish cutting the thin film body end face roughly cut by the first cutting blade. And characterized in that:

In a preferred embodiment of the method for cutting a thin film roll according to the present invention, the saw blade of the first cutting blade is a rotary saw, and the rotation speed of the saw blade of the first cutting blade is a rotary saw. Is that the rotation speed of the thin film roll is substantially the same as that of the thin film roll, and the cutting direction of the saw blade of the first cutting blade is forward with respect to the rotation direction of the thin film roll.

[Operation] According to the present invention, first, the thin film roll is roughly cut by the first cutting blade composed of a saw blade, and then the cut portion end face of the thin film roll that is roughly cut and the saw blade remains remains from the cutting tool. Finish cutting is performed by the second cutting blade.

The saw blade cuts the blade without escaping even if the thin film roll is hard or thick, and in addition to the function of simply cutting, it also removes cutting waste generated by cutting when rough cutting the thin film. Since it also has a function of removing cutting debris that is discharged from the outside, a gap slightly wider than the thickness of the saw blade is formed in the cutting portion. Therefore, the second consisting of a bite blade
At the time of the finish cutting by the cutting blade, the finish cutting is performed while entering the gap of the cutting portion without being hindered by cutting waste caused by the cutting of the first cutting blade. The second cutting blade is a bite blade, but the cutting by the bite blade is a cutting that cuts the saw blade mark on the end surface of the cutting portion and finishes the end surface. The blade does not escape even in the case of hard or thick winding.

Since the second cutting blade is a bite blade, it does not have a cutting waste removing function like the saw blade which is the first cutting blade.
The cutting waste on the end surface of the thin film body caused by cutting the cutting blade is
As described above, the first cutting blade escapes into the gap formed in the cutting portion as described above, and is discharged out of the cutting portion.
Also at the time of finish cutting by the cutting blade, finish cutting is performed without being hindered by cutting waste.

Further, since the thin film roll is supported from the inner peripheral surface of the core by the blade receiving portion, cutting at a low speed is possible. Further, since the blade receiving portion has a lower hardness than the cutting blade, the cutting blade does not wear even when the cutting proceeds and the cutting blade that has cut the core contacts the blade receiving portion.

In addition, in Japanese Utility Model Laid-Open No. 57-73098, immediately after making a cut in the thin film with a V-shaped cutting blade, the cut portion is scraped off with a saw blade and removed from the cut portion, and a plurality of thin film rolls are formed. Although the technique for cutting is described in a book, in this technique, the core is cut neatly or in a state where both ends protrude from the end surface of the thin film body in any of the surface drive method and the center drive method. It is difficult. This is because in the former case, the core is crushed by the pressing of the V-shaped cutting blade, and in the latter case, the cutting blade comes into contact with the spindle shaft and the blade is easily damaged. It is.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic plan view showing an example of a cutting apparatus preferably used in the manufacturing method of the present invention, FIG. 2 is a schematic side view thereof, and FIG. 3 is a partially cutaway plane showing an example of a support state of a thin film roll. FIG. 4 is an explanatory view showing an example of a cutting state by a first cutting blade, and FIG. 5 is an explanatory view showing an example of a cutting state by a second cutting blade.

In the figure, reference numeral 10 denotes a cutting device preferably used in the manufacturing method of the present invention, which is mainly composed of a support rotating means 20 for supporting and rotating the thin film roll 1 and a cutting means 30 for cutting.

The thin film roll 1 is a cylindrical core 2 made of kraft paper or the like.
It is wound on, for example, agricultural vinyl, an adhesive tape, a synthetic resin thin film represented by a masking tape, or a raw roll such as a paper thin film, and usually has a width of 1 to 7 m. The diameter is about 50-500mm. The diameter is 200
Thickness of about mm or more is called a thick roll.

The thin film roll 1 is supported by the below-described support rotating means 20 of the cutting device 10 and is cut into a plurality of pieces having a desired width by cutting means 30 described later while being rotated by the driving means.

First, the supporting and rotating means of the thin film roll 1 by the supporting and rotating means 20 will be described.

The thin film roll 1 is supported by inserting the spindle shaft 21 through the winding core 2 and is rotated (center drive system) by a drive source such as a motor (not shown) using the spindle shaft 21 as a drive shaft. It goes without saying that the thin film roll 1 may be supported and rotated by a surface drive method using the support roll as a drive source. The rotation speed of the thin film roll 1 is 5 to 1000
m / min.

A pressing portion 22 is provided on the spindle shaft 21 of the support rotating means 20 as shown in FIG. 3, and after the spindle shaft 21 is inserted into the core 2, the pressing portion 22 is moved by air pressure, hydraulic pressure, or the like. The thin film roll 1 is fixed to the spindle shaft 21 by pressing the inner peripheral surface of the core 2. The spindle shaft 21 is not limited to a single shaft, but may be of two known types, such as two shafts inserted from both sides of the core 2 or fixed by a tapered chuck mechanism. Can be.

Further, a blade receiving portion 23 having a lower hardness than a first cutting blade 31 and a second cutting blade 32 constituting a cutting means 30 described later is detachably attached to the spindle shaft 21. The hardness of the blade receiving portion 23 is preferably in the range of 50 to 95 mm, more preferably in the range of 60 to 90 mm, of rubber hardness (JIS K6301 A). As a specific material, urethane resin (rubber hardness of 87 mm) is used. ), Synthetic rubber (eg, NBR (nitrile butadiene rubber), SBR
(Styrene butadiene rubber), EPR (ethylene propylene rubber) and the like), synthetic resin such as NC nylon, polyethylene, and Teflon, and wood, and the most preferable is urethane resin.

The blade receiving portion 23 is provided inside the cut portion of the core 2 cut along with the thin film body, that is, at a position corresponding to a portion cut by the cutting means 30 and in contact with the inner peripheral surface of the core 2. It is arranged. The width of the blade receiving portion 23 may be any width that can support the inner peripheral surface of the core 2 against the pressing of the first cutting blade 31 and the second cutting blade 32 when cut by the cutting means 30.

Next, cutting of the thin film roll 1 by the cutting means 30 will be described.

The cutting means 30 mainly performs two types of cutting blades, that is, a first cutting blade 31 composed of a saw blade for roughly cutting the thin film roll, and finish-cuts the end face of the thin film roughly cut by the first cutting blade 31. And a second cutting blade 32 formed of a cutting tool blade. The first cutting blade is capable of moving in the axial direction of the thin film roll 1 in order to cut the thin film roll 1 into a plurality of desired pieces. At the time of cutting by the 31 and the second cutting blade 32, the first cutting blade 31 and the second cutting blade 32 can be fixed so as to be located at desired cutting positions. Further, the first cutting blade 31 and the second cutting blade 32 can move in the direction orthogonal to the thin film roll 1, respectively. When cutting, the first cutting blade 31 moves leftward on the drawing in FIG. The two cutting blades 32 also move rightward to cut the thin film roll 1.

The first cutting blade 31 is composed of a saw blade and first roughly cuts the thin film of the thin film roll 1. At this time, as shown in FIG. 4, the saw blade serving as the first cutting blade 31 discharges cutting waste 1A generated by cutting when the thin film body is roughly cut out from the cutting portion, in addition to the function of simply cutting. Since it also has a cutting waste removal function, it cuts while forming a gap slightly wider than the thickness of the saw blade at the cutting portion. Due to the presence of this gap, the second cutting blade 32 made of a cutting tool blade is used during finish cutting.
The finish cutting can be performed while entering the gap of the cutting portion without being hindered by the cutting waste 1A due to the cutting of the first cutting blade 31. Accordingly, the thickness of the first cutting blade 31 is 5 to 5 so that the second cutting blade 32 can easily enter the gap during the finish cutting.
It is about 50 mm, preferably about 10 to 30 mm.

In this embodiment, a circular saw is used as the first cutting blade 31 as shown in FIG. 2, but the present invention is not limited to a circular saw, and other rotary saws such as a band saw and a chain saw are used. A reciprocating saw can also be used. When the first cutting blade 31 is a rotary saw, the rotation speed of the rotary saw is preferably substantially the same as the rotation speed of the thin film roll 1, and more preferably the cutting direction is the thin film roll 1. Is in the forward direction with respect to the turning direction of. The turning speed of the thin film roll 1 at the time of rough cutting by the first cutting blade 31 is preferably 5 to 10
0 m / min, more preferably 10 to 70 m / min.

Since the core 2 is generally made of kraft paper, it is wise to avoid cutting with the first cutting blade 31 composed of a saw blade, for example, by setting a limit switch on the surface of the core 2. It is preferable that the first cutting blade 31 cuts only the thin film, and the core 2 is cut by the second cutting blade 32 described below.

After the rough cutting by the first cutting blade 31 is completed, the finishing cutting of the saw blade mark on the end face of the cutting portion is performed by the second cutting blade 32 composed of a bite blade. In this embodiment, as shown in FIG.
Since a single-edged blade is used as the second cutting blade 32, the cut end faces formed on one side of the cut portion are finish-cut one by one. FIG. 5 shows a state in which the right cut end face is finish-cut, and when the left cut end face is finish-cut, the second cutting blade 32 is rotated halfway in the arrow X direction and turned in the opposite direction. It is performed with one blade, but one blade may be turned upside down and the blade may be turned in the opposite direction, or two blades may be arranged in parallel and finish cut simultaneously on two surfaces. Is also good.

Since the second cutting blade 32 is a bite blade, it does not have a cutting waste removal function like a saw blade as the first cutting blade 31,
As shown in FIG. 5, the cutting waste 1B of the thin film body end surface generated by cutting the second cutting blade 32 escapes to the gap 1C formed in the cutting portion as described above by cutting the first cutting blade 31.
The finish cutting by the second cutting blade 32 can be performed without being hindered by the cutting waste 1B.

The second cutting blade 32 performs not only the finish cutting of the thin film portion of the thin film roll 1 but also the cutting of the core 2. The core 2
If it is desired to make both ends protrude from the end surface of the thin film body (so-called a state in which an appearance is left), cut only the thin film body by setting a limit switch on the surface portion of the core 2 or the like. Then, the core 2 is cut by moving the second cutting blade 32 by an amount corresponding to the number of rolls.

The rotation speed of the thin film roll 1 at the time of finish cutting by the second cutting blade 32 is preferably faster than that at the time of rough cutting by the first cutting blade 31 for finishing accuracy, workability, and the like. 50
10001000 m / min, more preferably 100 to 800 m / min.

The finish cutting by the second cutting blade 32 may be performed after the rough cutting by the first cutting blade 31 is completed, or may be performed immediately after the first cutting blade 31. For example, referring to FIG. The part which has been roughly cut on the right side (on the drawing) of 1 may be finished and cut immediately on the left side which has been rotated half a turn.

At the time of cutting by the cutting means 30 having the above configuration, the thin film roll 1 rotated by the spindle shaft 21 is cut into a plurality of pieces having a desired width. Since it is supported from the inner peripheral surface inside the core 2 by the portion 23, it is possible to cut into a plurality of pieces having a desired width without breaking the shape of the cutting portion even at a low rotation speed. Further, since the blade receiving portion 23 has a lower hardness than the second cutting blade 32, the second cutting blade 32 that cuts the core 2 contacts the blade receiving portion 23 even when the cutting proceeds and the second cutting blade The blade 32 does not wear. When the blade receiving portion 23 is worn or damaged due to the contact of the second cutting blade 32, the blade receiving portion 23 is replaced with a new blade receiving portion 23.

[Effects of the Invention] According to the present invention, the thin film roll supported from the inner peripheral surface of the core by the blade receiving portion having a lower hardness than the cutting blade is firstly formed by the first cutting blade including the saw blade. It has a configuration in which the cut end of the thin film roll that has been roughly cut and then roughly cut is finish-cut by the second cutting blade composed of a cutting tool blade. Even if it is, it can be cut into a plurality of pieces of a desired width without breaking the shape of the cut portion.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an example of a cutting apparatus preferably used in the manufacturing method of the present invention, FIG. 2 is a schematic side view thereof, and FIG. 3 is a partially cutaway plane showing an example of a support state of a thin film roll. FIG. 4 is an explanatory view showing an example of a cutting state by a first cutting blade, and FIG. 5 is an explanatory view showing an example of a cutting state by a second cutting blade. 1: Thin film roll 1A, 1B: Cutting waste 1C: Gap 2: Core 10: Cutting device 20: Support rotating means 21: Spindle shaft 22: Pressing part 23: Blade receiving part 30: Cutting means 31: First cutting Blade 32: Second cutting blade

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26D 3/16 B26D 1/14

Claims (4)

(57) [Claims] 1. A thin film roll wound around a cylindrical core,
In a method of cutting a thin film roll for cutting into a plurality of pieces of a desired width by pressing a cutting blade in a rotated state,
Inside the core of the rotating thin film roll, a blade receiving portion having a lower hardness than the cutting blade is inserted so as to be in contact with the inner peripheral surface of a portion cut together with the thin film, and the cutting blade is A first cutting blade comprising a saw blade for roughly cutting the thin film roll;
A method for cutting a thin film roll, comprising: a second cutting blade comprising a bite blade for finish-cutting the thin film end face roughly cut by the first cutting blade. 2. The method for cutting a thin film roll according to claim 1, wherein the saw blade of the first cutting blade is a rotary saw. 3. The thin film roll according to claim 2, wherein the rotation speed of the saw blade of the first cutting blade, which is a rotary saw, is substantially the same as the rotation speed of the thin film roll. Cutting method. 4. The thin film roll according to claim 1, wherein the cutting direction of the saw blade of the first cutting blade is a forward direction with respect to the rotation direction of the thin film roll. Cutting method.