JPH11333781A - Machining tool for workpiece including polyethylene naphthalene-made base material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform high-quality and high-accuracy machining work without causing poor machining to a polyethylene naphthalene-made base plate by setting the cutting edge angle to the angle in the specified range and also setting the shear angle in the specified angle. SOLUTION: A machining tool 10 is provided with a lower blade 12 and an upper blade 14 and cuts a work piece 16 including a polyethylene naphthalene-made base material along a cutting estimated line 18. In the upper blade 14, the blade angle α deg. to be projected to the surface perpendicular to the cutting estimated line 18 is the cutting edge angle, and the angle β deg. in which the work piece 16 is pinched between the upper blade 14 and the lower blade 12 is a shear angle. The cutting edge angle is set in the range of 60 deg. to 90 deg., and the shear angle is set in the range of 25 deg. to 55 deg.. When the cutting edge angle is less than 60 deg., the base burrs are generated on the work piece, while, when the cutting edge angle is not less than 90 deg., emulsion chips and base whiskers are generated. Moreover, when the shear angle is less than 25 deg., the emulsion separation and base whiskers are generated, while, the shear angle is less than 55 deg., base burrs are generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lower blade and an upper blade,
The present invention relates to a processing tool for performing processing on a workpiece including a substrate made of polyethylene naphthalate.

[0002]

2. Description of the Related Art In the processing of a workpiece such as a photographic film, there are various processing steps such as perforation, cutting, cutting, trimming and notching. The tools used for this type of machining require a sharp edge and a shear angle in order to obtain a good cut surface.
gle) must be set to an appropriate angle condition.

In this case, triacetylcellulose (TA) which is usually used as a base material of a photographic film is used.
C) and polyethylene terephthalate (PET) have a wide range of cutting angle conditions at which a good cut surface can be obtained. For this reason, the bevel angle and shear angle are set in consideration of the moldability and abradability of the blade, the handling of the photographic film at the time of cutting, and the like.
At 0 °, the shear angle was set at approximately 0 °.

Recently, polyethylene naphthalate (PEN) has come to be used as various base materials. For example, a base material made of polyethylene naphthalate (hereinafter, also referred to as PEN base) is widely used for APS film. ing.

[0005]

However, in the above-mentioned PEN base, if processing is performed based on the conventional angle conditions, a base mustache, edge dripping, base cracking, base burr, emulsion debris and emulsion peeling, etc., will occur on the cut surface. It is pointed out that the problem occurs.

When a base mustache is generated on the cut surface, the base mustache may fall off the cut surface and contaminate the inside of a camera, a cartridge, a developing machine, or other equipment or a process of a production facility. In addition, the dropped base mustaches reattach to the photographic film and significantly degrade the photographic quality, and the IX which is a feature of the APS system.
There is a defect that impairs the performance (magnetic recording function of photographic information). Moreover, the presence of the base mustache results in APS
The function of feeding the film from the cartridge a plurality of times, which is a feature of the film, is impaired. In addition, when the base mustache is present on the cut surface, the cutting blade is significantly worn, and there is a problem that an efficient machining process cannot be performed.

Further, it has been pointed out that when a base crack occurs, a developing solution easily penetrates into the cracked portion, and the portion where the developing solution penetrates becomes cloudy after drying. Moreover, similarly to the base mustache, there is a problem that the progress of wear of the cutting blade is accelerated.

Further, when base burr occurs,
The burrs become projections projecting from the cut end surface. For this reason, for example, when the photographic film is wound around the axis of the cartridge and wrapped around the burrs, the burrs are pressed against the photosensitive surface or the base of the photographic film, so that pressing marks and scratches are apt to be generated, causing deterioration in photographic quality. Furthermore, the thickness increases in accordance with the burr, and when a long product is made into a single wound body, the winding state is biased, which is a major problem in the production process. Would. Further, when the edge bulge occurs, similarly to the base burr, pressing marks and scratches are formed at the time of winding, and a defect occurs in the wound state.

[0009] On the other hand, if emulsion chips are generated on the cut surface, the emulsion chips may fall off the cut surface as in the case of the base mustache, causing contamination inside various devices. In addition, photographic quality is degraded due to the reattachment of the emulsion dust to the photographic film. Further, it is pointed out that the developer easily penetrates into the emulsion-peeled portion, and a opaque portion is formed on the photographic film after drying.

The present invention solves this kind of problem, and has a very simple structure, does not cause any defects on the processing surface, and can easily perform high-quality processing. An object of the present invention is to provide a processing tool for a workpiece including a base material.

[0011]

According to the present invention, there is provided a tool for processing a workpiece including a substrate made of polyethylene naphthalate according to the present invention.
It has a lower blade and an upper blade, and the included angle is 60 ° or more.
The angle is set within a range of less than 0 ° and the shear angle is set within a range of 25 ° or more and less than 55 °.

If the edge angle is less than 60 °, base burrs and edge bulges are generated on the workpiece including the polyethylene naphthalate base material, while if the edge angle is 90 ° or more, the emulsion is not polished. Debris, emulsion peeling, base mustache, etc. occur. Further, if the shear angle is less than 25 °, emulsion peeling and base whiskers occur, and if the shear angle is 55 ° or more, base burrs are generated.

Therefore, by setting the cutting edge angle and the shear angle within the above ranges, it is possible to reliably obtain a good machined surface. In addition, it is only necessary to set the cutting edge angle and the shear angle, and it is possible to effectively prevent the manufacturing cost of the entire machining tool from rising.

The upper blade is a punch for punching, trimming or notching, or a rotary round blade for cutting or the like. Therefore, for photographic films based on polyethylene naphthalate,
Various processing can be performed efficiently and with high accuracy.

[0015]

FIG. 1 is a perspective view of a main part of a working tool 10 according to a first embodiment of the present invention. The processing tool 10 includes a lower blade 12 and an upper blade 14, and cuts an APS film (workpiece) 16 including a base material made of polyethylene naphthalate along a cutting line 18. The APS film 16 is configured by laminating an emulsion layer 16b on a PEN base 16a.

In the upper blade 14, a blade angle α ° projected on a plane orthogonal to the planned cutting line 18 is called a blade tip angle, and an angle β between which the upper blade 14 and the lower blade 12 sandwich the APS film 16.
° is called the shear angle. The included angle of the lower blade 12 is set to approximately 90 °.

When the APS film 16 is cut along the planned cutting line 18 by the lower blade 12 and the upper blade 14 in the working tool 10 having the above-described configuration, the cutting of the APS film 16 is performed as shown in FIG. In the portion, a lower blade side cut surface 20 and an upper blade side cut surface 22 are formed.

Table 1 shows the characteristics of the cutting state of the lower cutting surface 20 by the combination of the cutting edge angle and the shear angle.

[0019]

[Table 1]

On the other hand, the characteristics of the cutting state on the upper blade side cutting surface 22 by the combination of the cutting edge angle and the shear angle are shown in Table 2.
Is shown in On the upper blade side cut surface 22, there is no problem regarding emulsion debris or emulsion peeling, but plastic flow of the member occurs only near the emulsion edge (base edge), and an edge bulge may be formed.

[0021]

[Table 2]

Next, in the lower blade side cut surface 20, Table 3
As shown in the figure, the combination of the edge angle and the shear angle
To the region H, and the cutting plane state of the APS film 16 in each of the regions A to H and the generation mechanism thereof will be described.

[0023]

[Table 3]

First, when the tip angle and shear angle belong to the region E, as shown in FIG. 3, when the APS film 16 is cut by the lower blade 12 and the upper blade 14, the PEN base 16a
In the cross section, a cut pattern is observed not only in the thickness direction but also in the cutting direction. This is because a relatively sharp edge angle is set, so that a crack propagates in the thickness direction from the upper blade 14 into the APS film 16, while a shear force in the advancing direction increases due to the action of the shear angle, PEN Base 1
This is because the tearing property of 6a itself is added, and the cracks are favorably developed in the cutting direction.

Accordingly, the APS film 16 can minimize the force acting in the thickness direction, and can reliably avoid the generation and the like of the emulsion layer 16b laminated on the surface. Become. Moreover, in the PEN base 16a, since the shear angle is in an appropriate angle range, the cracks generated from both sides of the upper blade 14 and the lower blade 12 coincide with each other, and the generation of the base mustache is effectively prevented (FIG. 4).

In the region B, the edge angle is smaller than that in the region E, so that cracks from the upper blade 14 into the APS film 16 hardly occur (see FIGS. 5 and 6). For this reason, in the APS film 16, the deformation shown by the arrow in FIG. 5 occurs on the upper blade 14 side, and the emulsion layer 16 b on the upper layer is rubbed against the side surface of the upper blade 14 to generate emulsion debris. I will. In addition, the deformation force easily acts beyond the adhesion limit between the emulsion layer 16b and the PEN base 16a, and there is a possibility that the emulsion peels off.

In the region D, since the shear angle is insufficient, A
The cutting of the PS film 16 proceeds mainly by a force acting in the thickness direction. Therefore, as in the case of the region B, emulsion dust or emulsion peeling occurs. Further, as the cutting progresses, cracks are generated from the upper blade 14 and the lower blade 12, but in many cases, the shear angles do not exactly match due to an insufficient shear angle, and a base mustache is generated (FIG. 7 and FIG. 8).

Further, in the regions F and H, since the edge angle or shear angle is set sufficiently, the upper blade 14
Cutting from the side or cutting in the cutting direction is preferentially performed (see FIG. 9). In either case, no cracks are generated from the lower blade 12 side, and the PEN base 16a slips (deforms) to the edge on the lower blade 12 side, causing burrs (see FIG. 10). . In particular, in the region H (G), since the edge of the upper blade 14 cuts into a wedge shape, a desired flow is caused near the edge, and a local bulge is formed.

Therefore, by setting the cutting edge angle in the range of 60 ° or more and less than 90 ° and the shear angle in the range of 25 ° or more and less than 55 °, the base mustache, base burr, emulsion debris, and emulsion peeling Is reliably avoided. Thus, an effect is obtained in which a high-quality lower blade side cut surface 20 and an upper blade side cut surface 22 can be efficiently obtained with a simple configuration.

FIGS. 11 and 12 are schematic perspective explanatory views of a working tool 30 according to a second embodiment of the present invention. The working tool 30 is used for perforating a rectangular perforation 34 in the APS film 16.

As shown in FIGS. 11 to 14, the machining tool 30 includes first and second blade tips 36 provided at four corners of a perforated shape (rectangular shape) at diagonal positions.
38 and the four corners of the perforated shape, the first and second
Third and fourth blade tips 40, 42 provided corresponding to diagonal positions different from the blade tips 36, 38;
And a first diagonal ridge portion 44 connected to the second blade tip portions 36 and 38 and a second diagonal ridge portion 46 connected to the third and fourth blade tip portions 40 and 42. And a bevel angle setting point 48 for bending the first and second diagonal ridge portions 44 and 46 to set the edge angles of the first to fourth blade tip portions 36, 38, 40 and 42.

The first and second blade tips 36, 38
The third and fourth blade tips 40 and 42 protrude toward the PS film 16 and are connected to the first and second blade tips 3.
It is set at a height position apart from the APS film 16 from the positions 6 and 38. On four sides of the processing tool 30, a first ridge line portion 50 continuing to the first and third blade tip portions 36 and 40;
A second ridge line portion 52 connected to the third and second blade tip portions 40 and 38, a third ridge line portion 54 connected to the second and fourth blade tip portions 38 and 42, and a fourth and first blade tip portion 42; And a fourth ridge line portion 56 that continues to 36.

By setting the height positions of the third and fourth blade tips 40 and 42 in accordance with the positions of the first and second blade tips 36 and 38, the first to fourth ridge lines 50 and 5
The shear angles (β ゜) of 2, 54 and 56 are set to predetermined angles (see FIG. 13). The cutting edge angle set point 48 is the first
The height positions are set corresponding to the height positions of the first to fourth blade tip portions 36, 38, 40 and 42 (see FIG. 14), whereby the first to fourth ridge portions 50, 52, 5
The cutting edge angles (α （) of 4 and 56 are set. Specifically, the cutting edge angle is set in a range of 60 ° or more and less than 90 °, and the shear angle is set in a range of 25 ° or more and less than 55 °.

In the working tool 30 according to the second embodiment configured as described above, when the working tool 30 moves downward with respect to the APS film 16, first, the first and second blade tips 36, 38 reaches the APS film 16.

When the working tool 30 is further lowered, the first and second blade tips 36, 38 are cut into the APS film 16 corresponding to the diagonal positions of the perforations 34, and the first to fourth ridges 50 are formed. , 52, 54 and 56 process (cut) the APS film 16 corresponding to each side of the perforation 34. And
The third and fourth blade tips 40, 42 are made of APS film 1
6, the APS film 16 includes:
A perforation 34 will be formed.

In this case, in the machining tool 30 according to the second embodiment, the edge angles and the shear angles of the first to fourth ridge portions 50, 52, 54 and 56 are set within a predetermined angle range. Film 1 including PEN base 16a
6 has an effect that a desired perforation 34 can be efficiently and accurately drilled.
In particular, when used for perforating the APS film 16, it is possible to reliably perform perforation processing on all four sides of the perforation 34 in a good state without generating any emulsion debris, emulsion peeling, or base mustache.

FIG. 15 is a schematic structural explanatory view of a working tool 60 according to a third embodiment of the present invention. This machining tool 6
0 is for cutting the APS film 16;
A lower rotating round blade 62 and an upper rotating round blade 64 are provided.

By grinding the cutting edge of the upper rotary round blade 64, the cutting edge angle is set within a predetermined angle range. on the other hand,
The shear angle is determined by setting the diameter of the upper rotating round blade 64 and / or the lower rotating round blade 62 and the engagement depth L between the upper rotating round blade 64 and the lower rotating round blade 62. Is suitably set within the angle range of.

For example, when the diameter of the upper rotary blade 64 and the lower rotary blade 62 is 100 mm, if the engagement depth L is set to 1 mm, the shear angle becomes 16.2.
It becomes ゜. Therefore, by appropriately setting the engagement depth L, the shear angle can be set within a range of 25 ° or more and less than 55 °. The shear angle can be easily set by changing the diameter of the upper rotary blade 64 and the lower rotary blade 62 in addition to the change of the engagement depth L.

Thus, in the working tool 60 according to the third embodiment, the cutting edge angle and the shear angle can be set within desired angle ranges, respectively.
The same effects as those of the first and second embodiments can be obtained, such as that the cutting work of the APS film 16 including 6a is performed with high accuracy and smoothly.

[0041]

According to the working tool of the present invention containing a substrate made of polyethylene naphthalate according to the present invention, the cutting edge angle is in the range of 60 ° or more and less than 90 °, and the shear angle is 25 ° or more and less than 55 °. Because it is set in the range, without causing processing defects in the polyethylene naphthalate base material,
High-quality and high-precision machining operations can be reliably performed with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view of a main part of a working tool according to a first embodiment of the present invention.

FIG. 2 is an explanatory view of a cutting state by the working tool.

FIG. 3 is an explanatory diagram of a cutting state of the working tool belonging to an area E;

FIG. 4 is an enlarged explanatory view of a cross section of the area E.

FIG. 5 is an explanatory diagram of a cutting state of the working tool belonging to a region B;

FIG. 6 is an enlarged explanatory view of a cross section of the area B.

FIG. 7 is an explanatory diagram of a cutting state of a machining tool belonging to a region D;

FIG. 8 is an enlarged explanatory view of a cross section of the area D.

FIG. 9 is an explanatory diagram of a cutting state of the working tool belonging to regions F and H.

FIG. 10 is an enlarged explanatory view of a cut surface of the regions F and H.

FIG. 11 is an explanatory perspective view of a working tool according to a second embodiment of the present invention.

FIG. 12 is an explanatory perspective view of the working tool from the other side.

FIG. 13 is an explanatory diagram of a shear angle of the working tool.

FIG. 14 is an explanatory diagram of a cutting edge angle of the working tool.

FIG. 15 is a schematic configuration explanatory view of a working tool according to a third embodiment of the present invention.

[Explanation of symbols]

10, 30, 60: Processing tool 12: Lower blade 14: Upper blade 16: APS film 16a: PEN base 16b: Emulsion layer 18: Cut line 20: Lower blade side cut surface 22: Upper blade side cut surface 34: Perforation 36, 38, 40, 42: Blade tip 48: Blade tip angle set point 62, 64: Rotating round blade

Claims (4)

[Claims] 1. A processing tool for processing a workpiece including a base material made of polyethylene naphthalate with a lower blade and an upper blade, wherein a cutting edge angle is in a range of 60 ° or more and less than 90 °. Yes, and
A processing tool for a workpiece including a base material made of polyethylene naphthalate, wherein the shear angle is in a range of 25 ° or more and less than 55 °. 2. The work tool according to claim 1, wherein the upper blade is a punch for performing a punching process or the like on the work material. Machining tools. 3. The processing tool according to claim 1, wherein the upper blade is a rotary round blade for performing a cutting process or the like on the workpiece. Processing tools for processing materials. 4. The processing tool according to claim 1, wherein
The tool for processing a workpiece including a polyethylene naphthalate substrate, wherein the workpiece is a photographic film having the polyethylene naphthalate as a substrate.