JP2012035360A - Cutting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control generation and scattering of metallic powder during cutting operation, and remove the metallic powder adhered to a metallic material after being cut, in a cutting apparatus for cutting the metallic sheet material.SOLUTION: The cutting apparatus 100 includes: a cutting part 10 having upper and lower rotary cutters 12, 14; a first scraper 12s1 for application of a lubricant, which is provided so as to come into contact with a blade surface of the upper rotary cutter 12; a second scraper 12s2 for collecting metallic powder, which is provided so as to come into contact with the blade surface of the upper rotary cutter 12; and a suction part 20 provided downstream of the cutting part 10 and suctioning the metallic powder generated in cutting an electrode material Es and then scattered and the metallic powder adhered to electrode materials Es1, Es2 after being cut.

Description

  The present invention relates to a cutting device for cutting a sheet-like metal material.

  A battery such as a lithium ion battery generally uses a strip-shaped electrode material produced by cutting (shearing) a sheet-shaped electrode material to a desired width. For the production of such a strip-shaped electrode material, a cutting device called a slitter is often used.

  By the way, when a sheet-like electrode material is cut by a slitter, a metal powder having a size of several tens to several hundreds of microns is naturally generated, and this metal powder adheres to the electrode material surface or a cut edge portion. It has been known. Such generation of metal powder is particularly remarkable in an electrode material having a multilayer structure. When a battery is manufactured using the electrode material with the metal powder adhered, the metal powder may penetrate the separator constituting the battery to cause an internal short circuit or a self-discharge failure may occur. As a result, the reliability of the battery may be significantly reduced. For this reason, conventionally, various techniques for removing metal powder adhering to the electrode material during the production of the strip-shaped electrode material have been proposed. For example, according to the technique described in the following patent document, it is possible to remove the metal powder adhering to the strip-shaped electrode material.

JP 2004-195399 A JP 2002-352798 A JP 2004-171836 A Japanese Patent Laid-Open No. 7-136978 JP 2003-25136 A

  However, in the technique described in the above patent document, the scattering of the metal powder generated at the time of manufacturing the strip-shaped electrode material, that is, at the time of cutting the sheet-shaped electrode material has not been considered. For this reason, there is a possibility that the metal powder generated and scattered when the sheet-shaped electrode material is cut may be reattached to the band-shaped electrode material after the metal powder is removed or mixed into the battery.

  The present invention has been made to solve the above-described problems, and in a cutting apparatus that cuts a sheet-like metal material, the generation of metal powder at the time of cutting and scattering are suppressed, and the metal after cutting. The purpose is to remove metal powder adhering to the material.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A cutting device for cutting a sheet-like metal material,
A cutting section that has a first rotating cutter and a second rotating cutter that rubs against the first rotating cutter, and continuously cuts the metal material that has been transported along the transport direction;
A lubricant application part that is provided so as to contact a blade surface in at least one of the first rotary cutter and the second rotary cutter, and that applies a lubricant to the contacted blade surface;
The blade surface that is provided so as to come into contact with at least one of the first rotary cutter and the second rotary cutter on which one of the lubricant application portions is provided, and is generated when the metal material is cut. A dust collecting part for collecting the metal powder adhering to the lubricant together with the lubricant;
Provided on the downstream side of the cutting portion in the transport direction, generated when the metal material is cut and scattered, and a suction portion for sucking the metal powder attached to the metal material after cutting,
A cutting device comprising:

  In the cutting device of Application Example 1, by providing the lubricant application unit, friction between the first and second rotary cutters and the sheet-like metal material at the time of cutting the sheet-like metal material is reduced, Generation of metal powder can be suppressed. Therefore, the adhesion of the metal powder to the rotary cutter (blade surface) and the adhesion to the cut metal material can be suppressed. Furthermore, by providing the dust collection part, the metal powder adhering to the rotary cutter (blade surface) can be collected (removed) together with the lubricant. Furthermore, by providing the suction part, it is possible to suppress scattering of the metal powder generated at the time of cutting the sheet-like metal material. Moreover, by providing the said suction part, the metal powder adhering to the metal material after a cutting | disconnection can be removed non-contactingly. Therefore, when removing the metal powder adhering to the metal material after cutting, the surface of the metal material is not damaged. That is, the cutting device of Application Example 1 can suppress generation and scattering of metal powder when cutting a sheet-like metal material, and remove metal powder attached to the metal material after cutting.

  The lubricant application part and the dust collecting part may be formed separately or may be formed integrally. Moreover, the number of lubricant application parts and the number of dust collecting parts can be set arbitrarily.

[Application Example 2]
A cutting device according to Application Example 1,
The suction part is arranged at a position within 100 (mm) on the downstream side of the cutting part in the transport direction.
Cutting device.

  With the cutting device of Application Example 2, metal powder generated when cutting a sheet-like metal material can be effectively sucked, and scattering of the metal powder can be effectively suppressed. In addition, when the suction unit is arranged at a position separated from the downstream side 100 (mm) of the cutting unit in the transport direction, the suction unit is downstream of the cutting unit in the transport direction. It has been experimentally confirmed that the effect of suppressing the scattering of the metal powder is remarkably reduced as compared with the case where it is disposed at a position within 100 (mm).

[Application Example 3]
The cutting apparatus according to Application Example 1 or 2,
The suction part has a width of 20 (mm) or more in the width direction of the metal material with a cutting position in the metal material as a center, and a suction port provided to face the metal material after the cutting. Prepare
Cutting device.

  With the cutting device of Application Example 3, scattering of metal powder generated when cutting a sheet-like metal material can be more effectively suppressed. In addition, when the width of the suction port in the suction part is less than 20 (mm), the scattering of the metal powder is suppressed as compared with the case where the width of the suction port in the suction part is 20 (mm) or more. It has been experimentally confirmed that the effect of reducing significantly.

[Application Example 4]
The cutting device according to any one of Application Examples 1 to 3,
The suction differential pressure by the suction part is 1.0 (MPa) or more.
Cutting device.

  With the cutting device of Application Example 4, scattering of the metal powder generated when cutting the sheet-like metal material can be more effectively suppressed. In addition, when the suction differential pressure by the said suction part is less than 1 (MPa), the effect which suppresses scattering of metal powder compared with the case where the suction differential pressure by the said suction part is 1 (MPa) or more. Has been experimentally confirmed to decrease significantly.

[Application Example 5]
The cutting device according to any one of Application Examples 1 to 4,
The suction part is disposed at a position where a distance between the metal material transported to the downstream side of the cutting part in the transport direction and the suction port is 10 (mm) or less.
Cutting device.

  With the cutting device of Application Example 5, scattering of metal powder generated when cutting a sheet-like metal material can be further effectively suppressed. When the suction part is arranged at a position where the distance between the metal material and the suction port in the suction part is larger than 10 (mm), the suction part is sucked in the metal material and the suction part. It has been experimentally confirmed that the effect of suppressing the scattering of the metal powder is remarkably reduced as compared with the case where the distance from the mouth is 10 (mm) or less.

[Application Example 6]
The cutting device according to any one of Application Examples 1 to 5,
A distribution unit that distributes the metal material cut by the cutting unit in two directions substantially parallel to a cut surface of the metal material;
The angle formed by the two directions is set to 45 degrees or less.
Cutting device.

  With the cutting device of Application Example 6, scattering of the metal powder generated when cutting the sheet-like metal material can be more effectively suppressed. In addition, when the angle formed by the two directions is larger than 45 degrees, the distance between the metal materials after cutting becomes longer than when the angle formed by the two directions is 45 degrees or less. It has been experimentally confirmed that the effect of suppressing scattering is significantly reduced.

[Application Example 7]
The cutting device according to any one of Application Examples 1 to 6,
The lubricant application part is composed of a porous member,
The lubricant is applied in a state of impregnating the lubricant in an amount of 40 to 90 (%) with respect to the maximum amount of the lubricant that can be impregnated in the porous member.
Cutting device.

  With the cutting device of Application Example 7, the lubricant can be effectively applied to the blade surface of the rotary cutter. As the porous member, for example, felt, foamable rubber, or the like can be applied. It has been experimentally confirmed that when the amount of lubricant impregnated in the porous member is less than 40% of the maximum amount, the effect of the lubricant is remarkably reduced. Further, if the amount of lubricant impregnated in the porous member is larger than 90% of the maximum amount, the amount of lubricant adhering to the rotary cutter becomes excessive, and a large amount is applied to the cut surface of the metal material. It was experimentally confirmed that the lubricant adheres and the metal powder is adsorbed on the lubricant and is difficult to remove.

[Application Example 8]
The cutting device according to any one of Application Examples 1 to 7,
The dust collecting portion is made of a porous member.
Cutting device.

  With the cutting device of Application Example 8, the metal powder attached to the blade surface of the rotary cutter can be effectively collected in the pores of the porous member. As the porous member, for example, felt, foamable rubber, or the like can be applied.

[Application Example 9]
The cutting apparatus according to any one of Application Examples 1 to 8, further comprising:
Provided on the downstream side of the suction unit with respect to the transport direction, provided with a non-contact type ultrasonic cleaner for removing the metal powder remaining on the cut metal material in a non-contact manner,
Cutting device.

  With the cutting device of Application Example 9, the metal powder remaining on the metal material after cutting can be removed without being completely removed by the suction part. Further, since the metal powder is removed in a non-contact manner, the surface of the metal material is not damaged when the metal powder remaining on the metal material after cutting is removed.

It is explanatory drawing which shows schematic structure of the cutting device 100 as one Example of this invention. It is explanatory drawing which shows the structure of the cutting part 10 in the cutting device 100 and the suction part 20 vicinity in detail. FIG. 10 is an explanatory diagram showing an experimental result of Experiment A. FIG. 10 is an explanatory diagram showing an experimental result of Experiment B. 10 is an explanatory diagram showing an experimental result of Experiment C. FIG. FIG. 10 is an explanatory diagram showing an experimental result of Experiment D. FIG. 10 is an explanatory diagram showing an experimental result of Experiment E. It is explanatory drawing which shows the experimental result of the experiment F. FIG. It is explanatory drawing which shows the experimental result of the experiment G. FIG.

Hereinafter, embodiments of the present invention will be described based on examples.
A. Example:
FIG. 1 is an explanatory diagram showing a schematic configuration of a cutting apparatus 100 as an embodiment of the present invention. In FIG. 1, the side view of the cutting device 100 was shown. The cutting apparatus 100 is an apparatus that manufactures strip-shaped electrode materials Es1 and Es2 used for a lithium ion battery by cutting (shearing) the sheet-shaped electrode material Es to a predetermined width while conveying the sheet-shaped electrode material Es. The electrode material Es corresponds to the metal material in [Means for Solving the Problems].

  As illustrated, the cutting device 100 includes a cutting unit 10, a suction unit 20, a plurality of rollers 30, 32, 34, 36, 38, a winding unit 50, and a control unit 60.

  The cutting part 10 has an upper rotary cutter 12 and a lower rotary cutter 14. The upper rotary cutter 12 and the lower rotary cutter 14 are partially disposed so as to rub against each other, and continuously cut the conveyed electrode material Es along the conveyance direction. The upper rotary cutter 12 is provided with a first scraper 12s1 and a second scraper 12s2 so as to contact the blade surface. The first scraper 12s1 and the second scraper 12s2 will be described later. The upper rotary cutter 12 and the lower rotary cutter 14 respectively correspond to the first rotary cutter and the second rotary cutter in [Means for Solving the Problems].

  The suction part 20 is provided on the downstream side of the cutting part 10 in the conveying direction of the electrode material Es. The suction part 20 includes a suction port 22 to be described later, and is generated when the electrode material Es is cut into the electrode material Es1 and the electrode material Es2 by the cutting part 10, and the scattered metal powder and after cutting The metal powder adhering to the electrode materials Es1, Es2 is sucked and removed. The metal powder sucked by the suction unit 20 is discharged to the outside through a duct or the like (not shown) and collected so as not to scatter around.

  The electrode materials Es1 and Es2 cut by the cutting unit 10 are distributed by the rollers 30 and 32 in two directions substantially parallel to the cut surface. The rollers 30 and 32 correspond to a sorting unit in [Means for Solving the Problems].

  The electrode materials Es1 and Es2 distributed in two directions by the rollers 30 and 32 are conveyed in the order of the roller 34, the roller 36, and the roller 38, and are taken up by the take-up unit 50. In the present embodiment, a non-contact ultrasonic cleaner 40 (UVU type, manufactured by Shinko Co., Ltd.) is disposed in the vicinity of the upper portion of the roller 34. Therefore, the ultrasonic cleaner 40 can remove the metal powder remaining on the surfaces and edge portions of the electrode materials Es1 and Es2 without being completely removed by the suction portion 20. A non-contact type ultrasonic cleaner 42 (UVU type, manufactured by Shinko Co., Ltd.) is also disposed near the lower portion of the roller 36. Therefore, the ultrasonic cleaner 42 can remove the metal powder remaining on the back surface and the edge portion of Es1 and Es2 without being completely removed by the suction portion 20. Furthermore, since the ultrasonic cleaners 40 and 42 are non-contact ultrasonic cleaners, the surface of the electrode materials Es1 and Es2 may be damaged when the metal powder remaining on the electrode materials Es1 and Es2 is removed. Absent.

  The control unit 60 is configured as a microcomputer including a CPU, a memory, and the like inside. For example, the control unit 60 operates the cutting unit 10, the suction unit 20, the ultrasonic cleaners 40 and 42, the winding unit 50, and the like. Control.

  Hereinafter, the configuration in the vicinity of the cutting unit 10 and the suction unit 20 which are part of the features of the cutting apparatus 100 of the present embodiment will be described in detail.

  FIG. 2 is an explanatory diagram showing in detail the configuration in the vicinity of the cutting unit 10 and the suction unit 20 in the cutting apparatus 100. FIG. 2A is a side view showing the configuration in the vicinity of the cutting unit 10 and the suction unit 20 in the cutting apparatus 100. FIG. 2B shows a state when the suction part 20 is viewed from the upper side, that is, from a direction perpendicular to the electrode material Es.

  As described above, the upper rotary cutter 12 is provided with the first scraper 12s1 and the second scraper 12s2 so as to contact the blade surface (FIG. 2A). The first scraper 12s1 and the second scraper 12s2 are each made of a porous member. In this embodiment, felt is used as the first scraper 12s1 and the second scraper 12s2. As the first scraper 12s1 and the second scraper 12s2, other porous members such as foamable rubber may be used instead of felt.

  The first scraper 12s1 is impregnated with a lubricant dropped by a dropping device (not shown), and has a function of applying the lubricant to the blade surface of the upper rotary cutter 12. In this embodiment, a hydrocarbon solvent is used as the lubricant. As the lubricant, for example, alcohols that do not adversely affect the battery performance of the lithium ion battery, carbitol, ethers, or the like may be used instead of the hydrocarbon solvent. By providing the first scraper 12s1 in the upper rotary cutter 12, the friction between the upper rotary cutter 12 and the lower rotary cutter 14 and the electrode material Es when the electrode material Es is cut is reduced, and the generation of metal powder is suppressed. Can do. Therefore, adhesion of metal powder to the blade surfaces of the upper rotary cutter 12 and the lower rotary cutter 14 and adhesion to the cut electrode materials Es1, Es2 can be suppressed.

  In addition, the dropping device is configured so that the first scraper 12s1 is always impregnated with 40 to 90 (%) of lubricant with respect to the maximum amount of lubricant that can be impregnated with the first scraper 12s1. 60. The reason why the amount of lubricant impregnated in the first scraper 12s1 is 40% or more of the maximum amount that can be impregnated in the first scraper 12s1 is that the maximum amount that can be impregnated in the first scraper 12s1 as shown later. This is because the effect of the lubricant is remarkably reduced and the adhesion and adhesion of the metal powder to the blade surface of the upper rotary cutter 12 has been experimentally confirmed (Experiment A). The amount of lubricant impregnated in the first scraper 12s1 is 90% or less of the maximum amount that can be impregnated in the first scraper 12s1, as will be described later, the first scraper 12s1 can be impregnated. If it exceeds 90 (%) of the maximum amount, the amount of lubricant adhering to the upper rotary cutter 12 becomes excessive, and a large amount of lubricant adheres to the cut surfaces of the electrode materials Es1, Es2, and the lubricant This is because it has been experimentally confirmed that metal powder is adsorbed and difficult to remove (Experiment A). The first scraper 12s1 corresponds to the lubricant application section in [Means for Solving the Problems].

  FIG. 3 is an explanatory diagram showing an experimental result of Experiment A. In this experiment A, the amount of lubricant impregnated in the first scraper 12s1 provided in the upper rotary cutter 12 was changed, and (i) metal generated on the blade surface of the upper rotary cutter 12 when the electrode material Es was cut. Whether or not the powder has adhered, and (ii) whether or not the metal powder adheres to the electrode materials Es1 and Es2 wound around the winding portion 50 is measured by a microscope (manufactured by Keyence Corporation). Observed.

The experimental conditions are as follows.
A-1: The first scraper 12s1 is not impregnated with the lubricant.
A-2: The first scraper 12s1 is impregnated with an amount of lubricant of 20% with respect to the maximum amount of lubricant that can be impregnated.
A-3: The first scraper 12s1 is impregnated with a lubricant in an amount of 40% with respect to the maximum amount of lubricant that can be impregnated.
A-4: The first scraper 12s1 is impregnated with 60% of the lubricant with respect to the maximum amount of lubricant that can be impregnated.
A-5: The first scraper 12s1 is impregnated with a lubricant in an amount of 80% with respect to the maximum amount of lubricant that can be impregnated.
A-6: The first scraper 12s1 is impregnated with an amount of 90% of the lubricant with respect to the maximum amount of lubricant that can be impregnated.
A-7: The first scraper 12s1 is impregnated with 100% (%) of lubricant with respect to the maximum amount of lubricant that can be impregnated.

  As shown in the drawing, in the experimental conditions A-3 to A-7 in which the amount of lubricant impregnated in the first scraper 12s1 is 40% or more with respect to the maximum impregnable amount, the upper rotary cutter 12 is used. The adhesion of the metal powder to the blade surface was observed only in an acceptable range. On the other hand, in the experimental conditions A-1 and A-2, the amount of lubricant impregnated in the first scraper 12s1 is less than 40% with respect to the maximum amount that can be impregnated. Adhesion of metal powder to 12 blade surfaces was observed.

  Further, under the experimental conditions A-1 to A-6 in which the amount of lubricant impregnated in the first scraper 12s1 is 90% or less with respect to the maximum amount that can be impregnated, the winding unit 50 winds up. The adhesion of the metal powder to the obtained electrode materials Es1, Es2 was observed only in an acceptable range. On the other hand, in the experimental condition A-7 in which the amount of lubricant impregnated in the first scraper 12s1 is larger than 90 (%) with respect to the maximum amount that can be impregnated, the electrode wound around the winding portion 50 The adhesion of metal powder exceeding the allowable range to the materials Es1 and Es2 was observed.

  From the above experimental results, in the cutting apparatus 100 of the present embodiment, the first scraper 12s1 is impregnated with the lubricant in an amount of 40 to 90 (%) with respect to the maximum amount of lubricant that can be impregnated in the first scraper 12s1. It was made to be.

  The second scraper 12s2 has a function of collecting (removing) the metal powder generated when the electrode material Es is cut and attached to the blade surface of the upper rotary cutter 12. Since the second scraper 12s2 is made of a porous member (felt), the metal powder adhering to the blade surface of the upper rotary cutter 12 can be effectively collected in the pores.

  Here, the reason why the first scraper 12s1 is used for applying lubricant and the second scraper 12s2 is used for collecting dust in the cutting apparatus 100 of the present embodiment will be described.

  FIG. 4 is an explanatory diagram showing the experimental results of Experiment B. In this experiment B, when the first scraper 12s1 and the second scraper 12s2 provided on the upper rotary cutter 12 are used for applying lubricant or collecting dust, respectively, (i) the upper rotary cutter Whether or not the metal powder generated when the electrode material Es is cut adheres to the blade surface of 12, and (ii) the metal powder adheres to the electrode materials Es1 and Es2 wound around the winding portion 50. Whether or not there was was observed with a microscope (manufactured by Keyence Co., Ltd.).

The experimental conditions are as follows.
B-1: Both the first scraper 12s1 and the second scraper 12s2 are for dust collection.
B-2: Both the first scraper 12s1 and the second scraper 12s2 are used for lubricant application.
B-3: The first scraper 12s1 is used for collecting dust, and the second scraper 12s2 is used for applying lubricant.
B-4: The first scraper 12s1 is used for lubricant application, and the second scraper 12s2 is used for dust collection.
B-5: The first scraper 12s1 is used for lubricant application, and the second scraper 12s2 is not provided on the upper rotary cutter 12.
B-6: The first scraper 12s1 is used for collecting dust, and the second scraper 12s2 is not provided on the upper rotary cutter 12.
The scraper used for applying the lubricant was always impregnated with 75% of the lubricant with respect to the maximum amount of lubricant that can be impregnated with the scraper.

  As shown in the drawing, at least one of the first scraper 12s1 and the second scraper 12s2 is for lubricant application, and under the experimental conditions B-2, B-3, B-4, and B-5, the upper rotation No adhesion of metal powder to the blade surface of the cutter 12 was observed. On the other hand, adhesion of metal powder to the blade surface of the upper rotary cutter 12 was observed in the experimental conditions B-1 and B-6 in which the upper rotary cutter 12 was not provided with a scraper for applying lubricant. .

  Further, in the experimental conditions B-1 and B-4, the adhesion of the metal powder to the electrode materials Es1, Es2 wound around the winding portion 50 was not observed. On the other hand, in the experimental conditions B-2, B-3, B-5, and B-6, adhesion of metal powder to the electrode materials Es1 and Es2 wound around the winding portion 50 was observed.

  From the above experimental results, in the cutting apparatus 100 of the present example, the first scraper 12s1 was used for lubricant application, and the second scraper 12s2 was used for dust collection.

  Moreover, in the cutting device 100 of the present embodiment, the suction unit 20, that is, the suction port 22 included in the suction unit 20 is disposed at a position within 100 (mm) on the downstream side of the cutting unit 10 in the transport direction of the electrode material Es. (D ≦ 100 (mm)). By carrying out like this, the metal powder generate | occur | produced at the time of cutting | disconnection of electrode material Es can be attracted | sucked effectively, and scattering of metal powder can be suppressed effectively. Note that the suction unit 20 is disposed at a position within 100 (mm) on the downstream side of the cutting unit 10 in the transport direction of the electrode material Es because the suction unit 20 is cut in the transport direction of the electrode material Es. In the case where the suction part 20 is arranged at a position farther from the downstream side 100 (mm) than the case where the suction part 20 is arranged at a position within the downstream side 100 (mm) of the cutting part 10 in the transport direction of the electrode material Es. It is because it was experimentally confirmed that the effect which suppresses scattering of metal powder falls remarkably (experiment C).

  FIG. 5 is an explanatory diagram showing the experimental results of Experiment C. In this experiment C, the electrode material Es in the vicinity of the cutting unit 10 and the suction unit 20 shown in FIG. 2A is changed by changing the distance (suction distance) from the cutting unit 10 to the suction port 22 of the suction unit 20. The scattering state of the metal powder generated during cutting was observed with a fine particle visualization system (manufactured by Shin Nippon Air Conditioning Co., Ltd.).

The experimental conditions are as follows.
C-1: The distance from the cutting part 10 to the suction port 22 provided in the suction part 20 is 10 (mm).
C-2: The distance from the cutting part 10 to the suction port 22 provided in the suction part 20 is 40 (mm).
C-3: The distance from the cutting part 10 to the suction port 22 included in the suction part 20 is set to 70 (mm).
C-4: The distance from the cutting part 10 to the suction port 22 provided in the suction part 20 is 100 (mm).
C-5: The distance from the cutting part 10 to the suction port 22 provided in the suction part 20 is 130 (mm).
As shown in the figure, under each experimental condition of Experiment C, the width of the suction port 22 (suction port width), the suction differential pressure by the suction unit 20, and the distance between the electrode material Es1 and the suction port 22 (electrode / suction) The distance between the mouths) and the distribution angles of the electrode material Es1 and the electrode material Es2 are all the same.

  As shown in the drawing, in the experimental conditions C-1 to C-4 in which the distance from the cutting unit 10 to the suction port 22 provided in the suction unit 20 is 100 (mm) or less, the metal generated when the electrode material Es is cut. Powder scattering was observed only within an acceptable range. On the other hand, in the experimental condition C-5 in which the distance from the cutting unit 10 to the suction port 22 included in the suction unit 20 is larger than 100 (mm), the allowable range of the metal powder generated when the electrode material Es is cut. Spattering exceeding

  From the above experimental results, in the cutting device 100 of the present embodiment, the suction unit 20 is disposed at a position within 100 (mm) on the downstream side of the cutting unit 10 in the transport direction of the electrode material Es.

  Moreover, in the cutting device 100 of the present embodiment, the suction port 22 in the suction unit 20 is 20 (in the width direction of the electrode material Es with the cutting position in the electrode material Es as the center, as shown in FIG. 2B). mm) or more width w (10 mm or more on one side). And in the suction part 20, the suction port 22 is provided so that electrode material Es1, Es2 may be opposed. By carrying out like this, scattering of the metal powder which generate | occur | produced at the time of cutting | disconnection of electrode material Es can be suppressed further effectively. Note that the width w of the suction port 22 in the suction unit 20 is set to 20 (mm) or more with the cutting position in the electrode material Es as the center. The width w of the suction port 22 in the suction unit 20 is 20 (mm). It was experimentally confirmed that the effect of suppressing the scattering of the metal powder is significantly reduced when the width is less than that when the width w of the suction port 22 in the suction portion 20 is 20 (mm) or more. (Experiment D).

  FIG. 6 is an explanatory diagram showing the experimental results of Experiment D. In this experiment D, the width of the suction port 22 (suction port width) provided in the suction unit 20 is changed, and this occurs when the electrode material Es is cut in the vicinity of the cutting unit 10 and the suction unit 20 shown in FIG. The state of scattering of the metal powder to be observed was observed with a fine particle visualization system (manufactured by Nippon Air Conditioning Co., Ltd.).

The experimental conditions are as follows.
D-1: The width of the suction port 22 is 10 (mm).
D-2: The width of the suction port 22 is set to 15 (mm).
D-3: The width of the suction port 22 is 20 (mm).
D-4: The width of the suction port 22 is set to 25 (mm).
As illustrated, in each experimental condition of Experiment D, the distance (suction distance) from the cutting unit 10 to the suction port 22 provided in the suction unit 20, the suction differential pressure by the suction unit 20, the electrode material Es1 and the suction The distance to the port 22 (electrode / suction port distance) and the distribution angles of the electrode material Es1 and the electrode material Es2 are all the same.

  As shown in the drawing, in the experimental conditions D-3 and D-4 where the width of the suction port 22 is 20 (mm) or more, the scattering of the metal powder generated when the electrode material Es is cut is within an allowable range. Was only observed. On the other hand, in the experimental conditions D-1 and D-2 where the width of the suction port 22 was less than 20 (mm), scattering exceeding the allowable range of the metal powder generated when the electrode material Es was cut was observed. .

  From the above experimental results, in the cutting device 100 of the present embodiment, the width of the suction port 22 provided in the suction unit 20 is set to 20 (mm) or more.

  In the cutting device 100 of the present embodiment, the suction differential pressure Ps by the suction unit 20 is 1.0 (MPa) or more. By carrying out like this, scattering of the metal powder which generate | occur | produced at the time of cutting | disconnection of electrode material Es can be suppressed further effectively. The suction differential pressure Ps by the suction unit 20 is set to 1.0 (MPa) or more when the suction differential pressure Ps by the suction unit 20 is less than 1.0 (MPa). This is because it has been experimentally confirmed that the effect of suppressing the scattering of the metal powder is significantly reduced as compared with the case where the suction differential pressure Ps is set to 1.0 (MPa) or more (Experiment E).

  FIG. 7 is an explanatory diagram showing the experimental results of Experiment E. In this experiment E, by changing the suction differential pressure by the suction part 20, the scattering state of the metal powder generated at the time of cutting the electrode material Es in the vicinity of the cutting part 10 and the suction part 20 shown in FIG. The observation was made with a fine particle visualization system (manufactured by Shin Nippon Air Conditioning Co., Ltd.).

The experimental conditions are as follows.
E-1: The suction differential pressure by the suction unit 20 is set to 0.1 (MPa).
E-2: The suction differential pressure by the suction unit 20 is set to 0.3 (MPa).
E-3: The suction differential pressure by the suction unit 20 is set to 0.5 (MPa).
E-4: The suction differential pressure by the suction unit 20 is set to 0.7 (MPa).
E-5: The suction differential pressure by the suction part 20 is set to 0.9 (MPa).
E-6: The suction differential pressure by the suction part 20 is set to 1.0 (MPa).
E-7: The suction differential pressure by the suction part 20 is set to 1.2 (MPa).
As shown in the drawing, in each experimental condition of Experiment E, the distance (suction distance) from the cutting unit 10 to the suction port 22 included in the suction unit 20, the width of the suction port 22 (suction port width), and the electrode material The distance between Es1 and suction port 22 (electrode / suction port distance) and the distribution angle between electrode material Es1 and electrode material Es2 are all the same.

  As shown in the drawing, in the experimental conditions E-6 and E7 in which the suction differential pressure by the suction unit 20 is 1.0 (MPa) or more, the scattering of the metal powder generated when the electrode material Es is cut is allowable. It was only observed within the range. On the other hand, in the experimental conditions E-1 to E-5 in which the suction differential pressure by the suction unit 20 is less than 1.0 (MPa), the metal powder generated when the electrode material Es is cut exceeds the allowable range. Was observed.

  From the above experimental results, in the cutting device 100 of this example, the suction differential pressure by the suction unit 20 was set to 0.1 (MPa) or more.

  Moreover, in the cutting device 100 of the present embodiment, the suction port 22 provided in the suction unit 20 has a distance between the suction port 22 and the electrode material Es1 transported to the downstream side of the cutting unit 10 in the transport direction of the electrode material Es. It shall be arrange | positioned in the position used as 10 (mm) or less (h <= 10 (mm)). By carrying out like this, scattering of the metal powder which generate | occur | produced at the time of cutting | disconnection of electrode material Es can be suppressed further effectively. The suction part 20 is arranged at a position where the distance between the electrode material Es1 and the suction port 22 is 10 (mm) or less, because the distance between the electrode material Es1 and the suction port 22 is 10 ( mm), the suction part 20 is less scattered than when the distance between the electrode material Es1 and the suction port 22 is 10 mm or less. This is because it has been experimentally confirmed that the effect of this is significantly reduced (Experiment F).

  FIG. 8 is an explanatory diagram showing the experimental results of Experiment F. In this experiment F, the distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 (distance between the electrodes / suction port) is changed, and in the vicinity of the cutting unit 10 and the suction unit 20 shown in FIG. The scattering state of the metal powder generated during the cutting of the electrode material Es was observed with a fine particle visualization system (manufactured by Shin Nippon Air Conditioning Co., Ltd.).

The experimental conditions are as follows.
F-1: The distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is set to 5 (mm).
F-2: The distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is set to 7 (mm).
F-3: The distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is 10 (mm).
F-4: The distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is set to 12 (mm).
F-5: The distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is set to 15 (mm).
As illustrated, in each experimental condition of Experiment F, the distance (suction distance) from the cutting unit 10 to the suction port 22 included in the suction unit 20, the width of the suction port 22 (suction port width), and the suction unit The suction differential pressure by 20 and the distribution angles of the electrode material Es1 and the electrode material Es2 are all the same.

  As shown in the drawing, in the experimental conditions F-1 to F-3 in which the distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is 10 (mm) or less, the metal generated when the electrode material Es is cut. Powder scattering was observed only within an acceptable range. On the other hand, in the experimental conditions F-4 and F-5 in which the distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 is greater than 10 (mm), the metal powder generated when the electrode material Es is cut Spattering beyond an acceptable range was observed.

  From the above experimental results, in the cutting device 100 of the present example, the distance between the electrode material Es1 and the suction port 22 included in the suction unit 20 was set to 10 (mm) or less.

  In the cutting apparatus 100 of the present embodiment, the distribution angle θ between the electrode material Es1 and the electrode material Es2 is set to θ ≦ 45 (°). By carrying out like this, scattering of the metal powder which generate | occur | produced at the time of cutting | disconnection of electrode material Es can be suppressed further effectively. The distribution angle θ between the electrode material Es1 and the electrode material Es2 is set to 45 degrees or less when the distribution angle θ between the electrode material Es1 and the electrode material Es2 is larger than 45 degrees. Experimentally confirmed that the distance between the electrode material Es1 and the electrode material Es2 is longer and the effect of suppressing the scattering of the metal powder is remarkably lower than when the distribution angle θ with the electrode material Es2 is 45 degrees or less. (Experiment G).

  FIG. 9 is an explanatory diagram showing the experimental results of Experiment G. In this experiment G, the distribution angle between the electrode material Es1 and the electrode material Es2 is changed, and the metal powder generated when the electrode material Es is cut in the vicinity of the cutting portion 10 and the suction portion 20 shown in FIG. The scattering state was observed with a fine particle visualization system (manufactured by Shin Nippon Air Conditioning Co., Ltd.).

The experimental conditions are as follows.
G-1: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 10 (°).
G-2: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 20 (°).
G-3: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 30 (°).
G-4: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 40 (°).
G-5: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 45 (°).
G-6: The distribution angle between the electrode material Es1 and the electrode material Es2 is set to 50 (°).
As shown in the figure, in each experimental condition of Experiment G, the distance (suction distance) from the cutting unit 10 to the suction port 22 included in the suction unit 20, the width of the suction port 22 (suction port width), and the suction unit The suction differential pressure by 20 and the distance between the electrode material Es1 and the suction port 22 provided in the suction unit 20 (distance between the electrodes / suction port) are all the same.

  As shown in the figure, in the experimental conditions G-1 to G-5 in which the distribution angle between the electrode material Es1 and the electrode material Es2 is 45 (°) or less, the scattering of the metal powder generated when the electrode material Es is cut is It was observed only within an acceptable range. On the other hand, in the experimental condition G-6 in which the distribution angle between the electrode material Es1 and the electrode material Es2 is larger than 45 (°), the metal powder generated at the time of cutting the electrode material Es exceeds the allowable range. Observed.

  From the above experimental results, in the cutting device 100 of the present embodiment, the distribution angle between the electrode material Es1 and the electrode material Es2 is set to 45 (°) or less.

  According to the cutting apparatus 100 of the present embodiment described above, the upper rotary cutter 12 is provided with 12s1 as a lubricant application part, so that the upper rotary cutter 12 and the lower rotary cutter 14 and the electrode when the electrode material Es is cut are provided. Friction with the material Es can be reduced and generation of metal powder can be suppressed. Therefore, the adhesion of the metal powder to the blade surface of the upper rotary cutter 12 and the adhesion to the cut electrode materials Es1, Es2 can be suppressed. Furthermore, by providing the upper rotary cutter 12 with the second scraper 12s2 as a dust collecting portion, the metal powder adhering to the blade surface of the upper rotary cutter 12 can be collected (removed) together with the lubricant. Furthermore, by providing the suction part 20, it is possible to suppress the scattering of the metal powder generated when the electrode material Es is cut. Moreover, by providing the suction part 20, the metal powder adhering to the electrode materials Es1 and Es2 after cutting can be removed without contact. Therefore, when removing the metal powder adhering to Es1 and Es2 after cutting, the surfaces of the electrode materials Es1 and Es2 are not damaged. That is, the cutting device 100 of the present embodiment can suppress the generation and scattering of the metal powder at the time of cutting the electrode material Es, and remove the metal powder attached to the electrode materials Es1 and Es2 after cutting. .

B. Variations:
Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and can be implemented in various modes without departing from the scope of the present invention. For example, the following modifications are possible.

B1. Modification 1:
In the said Example, although the cutting device 100 shall be an apparatus which manufactures the electrode material used for a lithium ion battery, this invention is not limited to this. The present invention is generally applicable to a cutting device that cuts a sheet-like metal material.

B2. Modification 2:
In the said Example, although the 1st scraper 12s1 as a lubricant application part and the 2nd scraper 12s2 as a dust collecting part were provided in the upper side rotary cutter 12, this invention is not limited to this. The cutting device of the present invention is generally provided so as to be in contact with the blade surface of at least one of the first rotary cutter and the second rotary cutter of the cutting unit, and lubrication is performed by applying a lubricant to the contacted blade surface. Blade surface that is provided to come into contact with the blade surface of at least one of the first and second rotary cutters provided with the agent coating portion and the lubricant coating portion, and is generated when the metal material is cut. And a dust collecting part for collecting the metal powder adhered to the substrate. Therefore, for example, the first scraper 12s1 as the lubricant application part and the second scraper 12s2 as the dust collecting part may be provided in the lower rotary cutter 14.

B3. Modification 3:
In the above embodiment, the first scraper 12s1 as the lubricant application part and the second scraper 12s2 as the dust collecting part are separate, but they may be integrally formed. Further, the number of scrapers as the lubricant application part and the number of scrapers as the dust collecting part can be arbitrarily set.

B4. Modification 4:
In the above embodiment, the first scraper 12s1 and the second scraper 12s2 are made of porous members, but the present invention is not limited to this. The first scraper 12s1 and the second scraper 12s2 may be made of other members that can function as a lubricant application unit and a dust collection unit.

B5. Modification 5:
In the above embodiment, the cutting apparatus 100 includes the ultrasonic cleaners 40 and 42, but these may be omitted. However, by providing the ultrasonic cleaners 40 and 42, the adhesion of the metal powder to the electrode material Es1 and the electrode material Es2 can be more effectively suppressed. Further, the number and arrangement of the ultrasonic cleaners can be arbitrarily changed.

B6. Modification 6:
In the above embodiment, the distance d between the cutting unit 10 and the suction unit 20 (suction port 22) shown in FIG. 2, the width w of the suction port 22, the suction differential pressure Ps by the suction unit 20, and the suction unit 20 (suction port 22). ) And the electrode material Es1 and the distance h, and the value of the distribution angle θ between the electrode material Es1 and the electrode material Es2, for example, the material and structure of the electrode material Es, the conveying speed of the electrode material Es, the upper rotary cutter 12 and the lower rotation Depending on the specifications of the cutter 14 and the like, it can be appropriately changed.

DESCRIPTION OF SYMBOLS 100 ... Cutting device 10 ... Cutting part 12 ... Upper side rotation cutter 12s1 ... 1st scraper 12s2 ... 2nd scraper 14 ... Lower side rotation cutter 20 ... Suction part 22 ... Suction port 30, 32, 34, 36, 38 ... Roller 40, 42 ... Ultrasonic cleaner 50 ... Winding unit 60 ... Control unit Es, Es1, Es2 ... Electrode material

Claims (9)

A cutting device for cutting a sheet-like metal material,
A cutting section that has a first rotating cutter and a second rotating cutter that rubs against the first rotating cutter, and continuously cuts the metal material that has been transported along the transport direction;
A lubricant application part that is provided so as to contact a blade surface in at least one of the first rotary cutter and the second rotary cutter, and that applies a lubricant to the contacted blade surface;
The blade surface that is provided so as to come into contact with at least one of the first rotary cutter and the second rotary cutter on which one of the lubricant application portions is provided, and is generated when the metal material is cut. A dust collecting part for collecting the metal powder adhering to the lubricant together with the lubricant;
Provided on the downstream side of the cutting portion in the transport direction, generated when the metal material is cut and scattered, and a suction portion for sucking the metal powder attached to the metal material after cutting,
A cutting device comprising: The cutting device according to claim 1,
The suction part is arranged at a position within 100 (mm) on the downstream side of the cutting part in the transport direction.
Cutting device. The cutting device according to claim 1 or 2,
The suction part has a width of 20 (mm) or more in the width direction of the metal material with a cutting position in the metal material as a center, and a suction port provided to face the metal material after the cutting. Prepare
Cutting device. The cutting device according to any one of claims 1 to 3,
The suction differential pressure by the suction part is 1.0 (MPa) or more.
Cutting device. The cutting device according to any one of claims 1 to 4,
The suction part is disposed at a position where a distance between the metal material transported to the downstream side of the cutting part in the transport direction and the suction port is 10 (mm) or less.
Cutting device. The cutting device according to any one of claims 1 to 5, further comprising:
A distribution unit that distributes the metal material cut by the cutting unit in two directions substantially parallel to a cut surface of the metal material;
The angle formed by the two directions is set to 45 degrees or less.
Cutting device. The cutting device according to any one of claims 1 to 6,
The lubricant application part is composed of a porous member,
The lubricant is applied in a state of impregnating the lubricant in an amount of 40 to 90 (%) with respect to the maximum amount of the lubricant that can be impregnated in the porous member.
Cutting device. The cutting device according to any one of claims 1 to 7,
The dust collecting portion is made of a porous member.
Cutting device. The cutting device according to any one of claims 1 to 8, further comprising:
Provided on the downstream side of the suction unit with respect to the transport direction, provided with a non-contact type ultrasonic cleaner for removing the metal powder remaining on the cut metal material in a non-contact manner,
Cutting device.

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