JP5682412B2 - Die cut roll of rotary die cutter - Google Patents

Description

  The present invention is a die-cut roll that constitutes a rotary die cutter together with an anvil roll, and a blade shape is formed on the outer peripheral surface of a cylindrical die roll body, and the blade shape and the anvil roll main body outer peripheral surface of the anvil roll , Relating to a die-cut roll of a rotary die cutter that applies a shearing process to a sheet-like workpiece inserted between the die roll main body and the anvil roll main body so that a workpiece as a product can be extracted from the workpiece. It is.

  In recent years, in lithium ion secondary batteries widely used for notebook computers and mobile phones, an electrode sheet in which an electrode material such as carbon or lithium manganate is applied to the surface of a metal foil made of aluminum or copper is used. It has been. Patent Documents 1 and 2 describe that a rotary die cutter including a die cut roll and an anvil roll is used to cut such an electrode sheet into a predetermined shape.

  Among these, in the rotary die cutter described in Patent Document 1, a resin film layer is formed on the outer peripheral surface of the anvil roll, and the blade mold formed on the die cut roll is cut into the resin film layer of the anvil roll. By cutting the electrode sheet having the metal foil into the blade shape without fail, and cutting the electrode sheet pieces crushed by the flat portion at the tip of the blade mold into the resin film layer, the electrode sheet is cut from the electrode sheet. By preventing this piece from adhering to the cut surface of the workpiece, which is a product, the generation of whiskers, burrs, and burrs is suppressed.

  However, when the workpiece is cut while forming the resin film layer on the outer peripheral surface of the anvil roll and cutting the die of the die-cut roll in this way, the resin film layer is cut and damaged while cutting continues. Therefore, the sharpness of the die shape of the die cut roll may be deteriorated. Further, if the electrode sheet piece is pushed into the resin film layer and left behind, the left piece may hit the blade mold and cause wear or chipping when the blade mold makes one round and cuts the next workpiece. .

  Therefore, recently, for example, a method of cutting a ceramic green sheet held on a carrier film as described in Patent Document 3 is used to attach an electrode sheet on a resin film and integrally die cut roll and anvil. Inserted between the roll and the die of the die cut roll penetrates the electrode sheet and cuts halfway through the thickness of the resin film, thereby cutting the workpiece that will be the product of the electrode sheet and peeling it from the resin film. On the other hand, a cutting method in which the end of the electrode sheet after the workpiece is peeled is collected as a trim together with the resin film has been adopted.

JP 2009-66676 A JP 2009-107047 A Japanese Patent Laid-Open No. 7-52099

  By the way, even when the electrode sheet is cut by such a cutting method, it is a matter of course that the occurrence of whiskers by leaving a piece at the time of cutting on the workpiece as the product of the electrode sheet may cause a short circuit of the electrode. Not. Further, slight fine burrs and burrs that do not cause a short circuit are allowed to some extent, but it is desirable that they are not generated from the viewpoint of processing quality.

  For this reason, it is desirable that the die shape of the die-cut roll is as sharp as possible due to the surface facing the workpiece. However, as described in Patent Document 1, the blade die has a flat portion and its center. If the shape is symmetrical with respect to the line, the workpiece may be cut on the trim side of the flat part even if the blade is sharp, and it cannot be cut reliably on the workpiece side that is the product. End up.

  On the other hand, for example, as described in Patent Documents 2 and 3, if the surface facing the workpiece is a surface perpendicular to the die axis that is the rotation axis of the die roll body of the die cut roll, the diameter relative to the die axis The crossing angle between the surface facing the work side and the flat part of the blade mold tip or the surface facing the trim side of the blade mold becomes small at the tip of the blade mold on the outer peripheral side in the direction. In this case, the blade shape is worn and the sharpness is deteriorated, and it is easy to cause whiskers, burrs, and burrs.

  The present invention has been made under such a background. As described above, the electrode sheet is attached on the resin film and is integrally inserted between the die-cut roll and the anvil roll, and the blade shape of the die-cut roll is determined. Even when the electrode sheet is cut by penetrating the electrode sheet to the middle of the thickness of the resin film, the electrode sheet can be surely cut on the workpiece side as a product, and thus It is an object of the present invention to provide a die cut roll of a rotary die cutter that generates not only burrs and burrs but also burrs and burrs as much as possible on a cut workpiece.

In order to solve the above-described problems and achieve such an object, the present invention projects from the outer peripheral surface of the cylindrical die roll body rotated around the die axis to extend on the outer peripheral surface. A blade mold is formed, and the die roll body and the outer peripheral surface of the cylindrical anvil roll body of the anvil roll rotated around the anvil axis parallel to the die axis line, the die roll body and the anvil roll body A die cut roll of a rotary die cutter that applies a shearing process to a sheet-like workpiece inserted between the workpieces so that a workpiece as a product can be extracted from the workpiece, wherein the blade die is the die roll body. On the outer peripheral surface of the die roll, the cross sections perpendicular to the direction in which the blade die extends approach each other toward the blade die center line perpendicular to the die axis line toward the outer peripheral side of the die roll body. A pair of inclined surfaces, and a chevron shape including a flat surface that is connected to the outer peripheral side of the pair of inclined surfaces and is orthogonal to the blade center line. In the cross section, the pair of inclined surfaces Is the workpiece-side angle of the workpiece-side inclined surface facing the workpiece side of the workpiece, and the workpiece is extracted from the workpiece opposite to the angle formed with respect to the blade center line. The trim side angle of the trim side inclined surface facing the trim side which is the rear end is made smaller, the workpiece side angle is in the range of 1 ° to 15 °, and the trim side angle is 10 ° to It is within a range of 45 °, and further, the intersection of the workpiece-side inclined surface and the flat surface, the intersection of the trim-side inclined surface and the flat surface, or extended lines of the trim-side inclined surface and the flat surface Hula between the intersection of The flat surface width is 5.0 mm or less, and the flat surface and the workpiece-side inclined surface intersect with each other at an angle, while the trim-side inclined surface and the flat surface intersect with each other. It is characterized by being a convex curve portion in contact with the trim side inclined surface and the flat surface .

  In the die cut roll configured as described above, the die shape of the die roll main body forms a mountain shape in a cross section perpendicular to the direction in which the blade die extends on the outer peripheral surface of the die roll main body, and the die rolls toward the outer peripheral side of the die roll main body. A pair of inclined surfaces inclined so as to approach each other toward the blade center line perpendicular to the axis, and a flat surface orthogonal to the blade center line connected to the outer peripheral side of these inclined surfaces, That is, since the surface of the blade mold facing the workpiece side is an inclined surface toward the blade mold center line side toward the outer peripheral side of the die roll body, the workpiece-side inclined surface facing the workpiece side and the flat surface of the blade mold tip It is possible to prevent the angle of crossing with and from being reduced, and to prevent sharpness deterioration due to early wear.

  And in the die cut roll of the above-mentioned composition, the work side angle which the work side inclined surface which faces the work side among these pair of inclined surfaces makes with respect to the blade center line is within the range of 1 ° to 15 °, The trim side angle of the trim side inclined surface facing the trim side is made smaller than the trim side angle, and the flat surface and the workpiece side inclined surface intersect with each other at an angle. The intersection angle between the flat surface and the workpiece-side inclined surface is smaller than the intersection angle at the intersection between the trim-side inclined surface and the flat surface or at the intersection between the trim-side inclined surface and the flat surface.

  For this reason, it is possible to give a sharp sharpness by using the intersecting ridge line between the workpiece side inclined surface and the flat surface as a cutting edge, and while pressing the workpiece between the flat surface and the trim side inclined surface, It becomes possible to cut the workpiece so as to be sharply cut by the edge. Therefore, even if the workpiece is an electrode sheet attached to the resin film as described above, the workpiece can be reliably cut on the workpiece side, and the cut of the workpiece thus cut is generated. Of course, the generation of burrs and burrs can be prevented as much as possible.

  Here, when the workpiece side angle exceeds 15 °, it becomes impossible to give such a sharp sharpness to the cutting edge. On the other hand, even if the workpiece side angle is less than 1 °, the cutting edge becomes worn early and the sharpness cannot be maintained, and none of the workpieces can be cut on the workpiece side. At the same time, beards, burrs and burrs are likely to occur.

  When the trim side angle is smaller than 10 °, the crossing angle between the trim side inclined surface and the flat surface becomes sharp, and the workpiece is cut even at the crossing ridge line portion. Furthermore, if the trim side angle exceeds 45 ° or the flat surface width exceeds 5.0 mm, the pressing by the flat surface or the trim side inclined surface becomes too strong, and the workpiece is In the case of an electrode sheet, it acts to stretch the metal foil, so that beard, burrs and burrs are likely to occur on the workpiece side.

  In addition, in order to prevent the occurrence of burrs and burrs due to insufficient pressing while reliably preventing the occurrence of whiskers, burrs and burrs due to excessive pressing of the workpiece, the flat surface width is 0.3 mm. It is desirable to be within a range of ˜3.0 mm.

On the other hand, as described above , the present invention prevents the workpiece from being cut even at the intersection ridge line portion between the trim side inclined surface and the flat surface, and more reliably cuts the workpiece on the workpiece side. In the above cross section, the intersecting ridge line portion between the trim side inclined surface and the flat surface is used as a convex curved portion in contact with the trim side inclined surface and the flat surface, so that the sharpness in the intersecting ridge line portion is dull .

  However, if the radius of curvature of this convex curve is too small, the sharpness cannot be dulled sufficiently, but if the radius of curvature is too large, the flat surface will not be pressed sufficiently and beards, burrs, and burrs will occur. Therefore, the radius of curvature of the convex curved portion is between the intersection of the workpiece-side inclined surface and the flat surface, and the intersection of the extension lines of the trim-side inclined surface and the flat surface. It is desirable that the flat surface width be less than or equal to 0.05 mm to 0.5 mm.

  As described above, according to the present invention, even if the workpiece is an electrode sheet attached to a resin film, the workpiece that is a product from such a workpiece can be reliably secured on the blade-type workpiece side. In addition to being able to cut, it is possible to prevent the occurrence of whiskers that cause a short circuit in the cut workpiece, and to suppress the occurrence of burrs and burrs as much as possible, and to achieve efficient and economical cutting with high product yield. Processing can be performed.

It is a perspective view explaining the rotary die cutter concerning one embodiment of the present invention. It is sectional drawing of the blade type | mold in one Embodiment of this invention. It is a side view of the rotary die cutter used for the Example of this invention.

  FIG. 1 is a perspective view of a rotary die cutter according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a blade die 2 of a die cut roll 1 according to an embodiment of the present invention in such a rotary die cutter. is there. That is, the rotary die cutter is composed of a die cut roll 1 and an anvil roll 11 each having a columnar shape, while rotating the die cut roll 1 and the anvil roll 11 in the rotational directions indicated by reference numerals R1 and R2 in the drawing. In the meantime, the sheet-like workpiece S is inserted and fed in the feed direction indicated by the symbol F in the drawing. At this time, the blade 2 formed on the outer peripheral surface of the die cut roll 1 is used to feed the workpiece S to the workpiece S. A shearing process is performed so that the workpiece W as a product can be extracted from the workpiece S.

  Here, the workpiece S to be processed by the die cut roll 1 of the present embodiment is a metal foil made of aluminum, copper, stainless steel or the like on a resin film A such as a fluororesin as shown in FIG. The electrode sheet B coated with an electrode material such as carbon or lithium manganate is attached to the surface of the sheet, and is inserted between the anvil roll 11 with the electrode sheet B facing the die cut roll 1 side. The blade mold 2 penetrates through the electrode sheet B and is cut halfway through the thickness of the resin film A, whereby the workpiece W of the electrode sheet B is sheared into the shape of the blade mold 2 and peeled from the resin film A. On the other hand, the remaining portion of the electrode sheet B after the workpiece W is extracted is regarded as an end of the workpiece S, and the trim T is formed with the resin film A. It is collected in.

  The die cut roll 1 includes a cylindrical die roll main body 3 centering on a die axis O1 serving as a rotation axis thereof, and a die roll main body 3 that is integrally projected at both ends of the die roll main body 3 so as to be coaxial. And a pair of rotation shafts 4 having a small diameter. These rotation shafts 4 are supported by a bearing box (not shown) and are also driven to rotate in the rotation direction R1 by a driving device (not shown). Note that at least the outer peripheral surface of the die roll body 3 of the die cut roll 1 is formed of a hard material such as cemented carbide.

  Further, at both ends of the die roll main body 3 of the die cut roll 1, a cylinder centering around a die axis O 1 having outer diameters equal to each other and slightly larger than the outer peripheral surface between the both ends. A band-shaped bearer portion 5 having a fixed width protruding so as to have a planar outer peripheral surface is formed, and these bearer portions 5 are brought into contact with the outer peripheral surface of the anvil roll main body 12 forming the columnar shape of the anvil roll 11. The die cut roll 1 is rotated while being rotated.

  The anvil roll 11 includes an anvil roll main body 12 having a columnar shape with the anvil axis O2 as a center, and a pair of small-diameter rotating shafts 13 integrally projecting from both ends thereof. These rotation shaft portions 13 are also supported by bearing boxes (not shown) so that the anvil axis O2 is parallel to the die axis O1, and the rotation direction R2 is opposite to the rotation direction R1 by a drive device (not shown). Is driven to rotate. Here, the outer peripheral surface of the anvil roll main body 12 is a cylindrical surface centering on the anvil axis O2, and the blade mold 2 and the bearer portion 5 like the die roll main body 3 of the die cut roll 1 are not formed.

  The blade die 2 of the die cut roll 1 is formed on the outer peripheral surface of the die roll body 3 between the bearer portions 5 so as to protrude from the outer peripheral surface of this portion and extend on the outer peripheral surface. The protrusion height of the mold 2 from the outer peripheral surface is such that when the blade mold 2 is cut into the workpiece S, the electrode sheet B penetrates and the resin film A does not penetrate to the middle of its thickness. As shown in the figure, the height of the resin film A is slightly smaller than the protruding height of the bearer portion 5.

  The blade mold 2 of the die cut roll 1 has a cross section orthogonal to the direction in which the blade mold 2 extends on the outer peripheral surface of the die roll main body 3 as shown in FIG. 2 on the outer peripheral side (lower side in FIG. 2). And a pair of inclined surfaces 2A, 2B inclined so as to approach each other toward a blade center line C perpendicular to the die axis O1 of the blade die 2 in the cross section, and outer peripheries of these inclined surfaces 2A, 2B It forms a mountain shape provided with a flat surface 2 </ b> C that is connected to the side and orthogonal to the blade center line C.

  In the same cross section, the angle formed by these inclined surfaces 2A, 2B with respect to the blade center line C is the workpiece-side angle α of the workpiece-side inclined surface 2A facing the workpiece W side of the workpiece S. Is set to be smaller than the trim side angle β of the trim side inclined surface 2B facing the trim T side in the opposite workpiece S, and the workpiece side angle α is in the range of 1 ° to 15 °. The side angle is in the range of 10 ° to 45 °.

  Further, between the intersection point P between the workpiece side inclined surface 2A and the flat surface 2C and the intersection point between the trim side inclined surface 2B and the flat surface 2C or the intersection point Q between the extended lines of the trim side inclined surface 2B and the flat surface 2C. The flat surface width D is 5.0 mm or less, preferably 0.3 mm to 3.0 mm. The flat surface 2C and the workpiece-side inclined surface 2A are formed so as to intersect at an angle.

  On the other hand, in the present embodiment, the intersecting ridge line portion between the flat surface 2C and the trim side inclined surface 2B is a convex curve-shaped portion 2D made of an arc in contact with the trim side inclined surface 2B and the flat surface 2C in the cross section. As described above, the flat surface width D is the width between the intersection point P and the intersection point Q between the extension lines of the trim side inclined surface 2B and the flat surface 2C shown by broken lines in FIG. In addition, the curvature radius r of this convex curve-shaped part 2D in the said cross section is below the said flat surface width D, and is in the range of 0.05 mm-0.5 mm.

  The blade center line C may be a straight line that passes through the center of the flat surface width D of the flat surface 2C as shown in FIG. However, since the blade center line C defines the workpiece side angle α and the trim side angle β, it is a straight line passing through the intersection P between the workpiece side inclined surface 2A and the flat surface 2C in the cross section, It is a straight line passing through the intersection of the trim side inclined surface 2B and the flat surface 2C, or the intersection Q of the extension line, or a straight line passing through the intersection of the extension line of the work side inclined surface 2A and the trim side inclined surface 2B. There may be.

  When the blade die 2 formed in this way is cut into the workpiece S as shown in FIG. 2, the trim side angle which is the inclination angle of the trim side inclined surface 2B facing the trim T side of the blade die 2. β is larger than the workpiece side angle α which is the inclination angle of the workpiece side inclined surface 2A facing the workpiece W side, and the trim side inclined surface 2B is the electrode sheet B of the workpiece S than the workpiece side inclined surface 2A. Since the contact area that comes into contact with the outer surface of the workpiece-side inclined surface 2A and the trim-side inclined surface 2B is increased, a flat surface 2C that is orthogonal to the blade center line C is formed. The resin film A is recessed so as to be pressed against the flat surface 2C and the trim side inclined surface 2B.

  On the contrary, the workpiece side inclined surface 2A facing the workpiece W side has a workpiece side angle α smaller than the trim side angle β and further intersects the flat surface 2C at an angle. Since the sharp edge of the cutting edge is formed at the intersection point P, the blade mold 2 is cut into the workpiece S and recessed into the resin film A as described above. As shown in FIG. 2, the electrode sheet B is sheared from the cutting edge so as to be torn.

  Therefore, according to the die-cut roll having such a configuration, the electrode sheet B can be reliably cut along the workpiece-side inclined surface 2A on the workpiece W side, which is a product of the blade mold 2, and at this time, the electrode sheet Even if the metal foil of B is deformed and a whiskers are generated, the whiskers are all generated on the trim T side of the electrode sheet B by pressing the electrode sheet B by the trim side inclined surface 2B or the flat surface 2C. Therefore, it does not remain in the workpiece W that is a product. For this reason, it is possible to prevent the occurrence of fatal defects due to whiskers in a lithium ion secondary battery using the electrode sheet B as the workpiece W, and to suppress the generation of burrs and burrs as much as possible. It is possible to cut the workpiece S efficiently and economically by improving the product yield.

  Further, in the die cut roll having the above-described configuration, the workpiece side angle is in the range of 1 ° to 15 ° and the trim side angle is in the range of 10 ° to 45 °. As a result, the electrode sheet B of the workpiece S can be more reliably cut on the workpiece W side. That is, when the workpiece-side angle α exceeds 15 °, it becomes impossible to ensure a sharp sharpness at the intersection P, which is the cutting edge as described above, and the electrode sheet B is reliably cut on the workpiece W side. There is a risk that it will not be possible. On the other hand, even if the workpiece side angle α is less than 1 °, even if the cutting process is sharp at the beginning, the cutting edge becomes worn early and becomes rounded. The workpiece S cannot be cut on the workpiece W side, and whiskers, burrs, and burrs are easily generated on the workpiece W side.

  Further, when the trim side angle β becomes smaller than 10 °, the crossing angle between the trim side inclined surface 2B and the flat surface 2C becomes small and the cross ridge line portion becomes sharp, and this cross ridge line portion also serves as a cutting edge. The electrode sheet B of the workpiece S may be cut even on the trim T side due to the action. On the other hand, when the trim side angle β is larger than 45 °, the contact area with the electrode sheet B when the blade mold 2 is cut into the workpiece S and recessed into the resin film A is increased. The action of pressing the electrode sheet B becomes too strong and the electrode sheet S made of the metal foil as described above is stretched, and there is a beard, a burr, or a burr on the workpiece W side to be cut. It tends to occur.

  This is the same for the flat surface width D of the flat surface 2C. That is, if the flat surface width D is too large, the flat surface 2C is also electroded when the blade mold 2 is recessed into the resin film A. The action of pressing down the sheet B becomes too strong, and beards and the like are likely to occur. For this reason, in the die cut roll having the above configuration, the flat surface width D is set to 5.0 mm or less, and is desirably 3.0 mm or less in order to reliably prevent burrs and burrs. Even if it becomes too small, the action of pressing the electrode sheet B is insufficient, and burrs and burrs are likely to occur. Therefore, it is desirable that the flat surface width D is 0.3 mm or more.

  On the other hand, in the present embodiment, a convex curved portion 2D such as a cross-sectional arc in contact with the flat surface 2C and the trim side inclined surface 2B is formed at the intersecting ridge line portion between the flat surface 2C and the trim side inclined surface 2B. Further, the sharpness of the intersecting ridge line portion is dulled to prevent it from acting as a cutting edge, and the electrode sheet B can be more reliably cut on the workpiece W side.

  However, when the convex curved portion 2D is formed at the intersecting ridge line portion between the flat surface 2C and the trim side inclined surface 2B in this way, such an effect cannot be obtained if the curvature radius r is too small. On the other hand, if the radius of curvature r is too large, the portion occupied by the convex curved portion 2D becomes too large in the flat surface 2C in which the flat surface width D is 5.0 mm or less as described above, and the flat surface 2C Since the pressing of the electrode sheet B may be insufficient, the curvature radius r in the cross section of the convex curved portion 2D is equal to or less than the flat surface width D and in the range of 0.05 mm to 0.5 mm. It is desirable that

  Next, the effects of the present invention will be demonstrated with examples. In this embodiment, as an experimental die-cut roll, first, a blade die 2 as shown in FIG. 3 extends in a rectangular manner in the direction of the die axis O1 with a constant period and amplitude toward the circumferential direction of the die roll body 3. A plurality of types of die cut rolls 1 are prepared. In these die cut rolls 1, the workpiece side angle α of the blade mold 2 is in the range of 1 ° to 20 °, and the trim side angle β is in the range of 1 ° to 50 °. In this way, the test piece of the workpiece S is cut as described above while being changed variously, and the workpiece W cut at that time is cut using the intersection P of the blade mold 2 as the cutting edge. It was confirmed and evaluated whether it was what was cut | disconnected by the intersection ridgeline part of the trim side inclined surface 2B and the flat surface 2C other than that.

  Here, the period X of the rectangular unevenness formed on the workpiece W by the blade mold 2 shown in FIG. 3 is 20 mm, and the length Y of the convex portion of this period X is 12 mm and the height Z is 13 mm. The blade portion 2 is formed so that 25 irregularities are formed on the workpiece W while the 3 rotates once. The test pieces are three types of 70 μm thick fluororesin film with 20 μm thick Al foil, Cu foil, and stainless steel foil, each of which is fed at a feed rate of 10 m / min. Cutting was performed so as to be inserted between the die cut roll 1 and the anvil roll 11.

  Further, a flat surface 2C having a flat surface width D of 0.3 mm is formed at the outer peripheral end of the blade portion 2, and a radius of curvature r is 0 at the intersecting ridge line portion between the flat surface 2C and the trim side inclined surface 2B. A convex curved portion 2D having a thickness of 0.05 mm was formed, and the flat portion 2C was positioned on the inner peripheral side of 45 μm in the radial direction with respect to the die axis O1 with respect to the bearer portion 5.

  In addition, the evaluation method observed the workpiece | work W which performed the cutting process with the CCD camera about the full length (form length) along the said unevenness | corrugation for one round of the die roll main body 3, and the workpiece | work W is a workpiece side inclined surface in this full length Only when it is confirmed that the crossing point P between 2A and the flat surface 2C has been cut as a cutting edge, it is marked with a circle, and other than that, the intersecting ridgeline between the trim side inclined surface 2B and the flat surface 2C. Those that had a part cut on the part side, a part that was not cut, and a part that had a beard were marked with a cross. The results are shown in the following Table 1 as a list in which the workpiece side angle α (°) is horizontal and the trim side angle β (°) is vertical.

  From the results of Table 1, when the workpiece side angle α is in the range of 1 ° to 15 °, the trim side angle β is in the range of 10 ° to 45 °, and α <β, the evaluation is all round. Of course, the whiskers were not generated, and the workpiece W was cut over the entire length (form length) with the intersection P between the workpiece side inclined surface 2A and the flat surface 2C as the cutting edge. It was confirmed that

  On the other hand, if at least one of the workpiece side angle α and the trim side angle β is out of the above range, or even within the range, α ≧ β, part or all of the foam length is inclined on the trim side It was confirmed that the surface 2B and the flat surface 2C were cut on the side of the intersecting ridge line, there were portions that were not cut, or the occurrence of whiskers.

  Next, in the same experimental die-cut roll 1 as shown in FIG. 3, the workpiece side angle α of the blade mold 2 is 5 °, the trim side angle β is 30 °, and the curvature radius r of the convex curved portion 2D is set. A plurality of types of die-cut rolls 1 having a flat surface width D varied in a range between 0.1 mm and 6.0 mm, with a constant value of 0.05 mm, were prepared. Under these conditions, the same conditions as shown in Table 1 were prepared. The test piece was cut.

  In addition, the evaluation method at this time is as follows. The workpiece W that has been cut similarly to the above is observed with a CCD camera, and the workpiece-side inclined surface of the entire length (form length) of the die roll body 3 along the irregularities is formed. Even if the crossing point P between 2A and the flat surface 2C is cut as a cutting edge, the mark with the beard attached is △, and the mark without the beard is the one with fine burrs and burrs Of course, no round marks or whiskers were attached, and no double burrs or burrs were observed. The results are shown in Table 2 below.

  From the results shown in Table 2, for the flat surface width D of 5.0 mm or less, although fine burrs and burrs were generated, no whiskers were observed. When the flat surface width D is in the range of 0.3 mm to 3.0 mm, no burrs or burrs are observed, and it has been confirmed that a work W of good quality can be manufactured.

  On the other hand, when the flat surface width D exceeded 5.0 mm, the cut workpiece W had adhesion of beards, and it was recognized that it was unsuitable as a product. In addition, in the Example at this time, a part or all of the foam length is cut on the side of the intersecting ridge line between the trim side inclined surface 2B and the flat surface 2C, or there is a portion that is not cut. I was not able to admit.

  Furthermore, in the same experimental die cut roll 1 as shown in FIG. 3, the workpiece side angle α of the blade mold 2 is 5 °, the trim side angle β is 30 °, and the flat surface width D is constant at 0.5 mm. As described above, the curvature radius r of the convex curved portion 2D formed at the intersection ridge line portion between the flat surface 2C and the trim side inclined surface 2B is variously changed between 0.05 mm and 0.7 mm, and the convex curved shape A plurality of types of die cut rolls 1 having a flat surface 2C and a trim-side inclined surface 2B intersecting at an angle (with a curvature radius of r = 0 mm) without forming the portion 2D are prepared. The test piece was cut under the same conditions as described above. The evaluation method at this time is the same as when the flat surface width D is changed. The results are shown in Table 3 below.

  In the embodiment shown in Table 3, the radius of curvature r of the convex curved portion 2D is 0 mm, that is, the flat curved surface 2C and the trim side inclined surface 2B are intersected at an angle without forming the convex curved portion 2D. The workpiece side angle α is within the range of 1 ° to 15 °, the trim side angle β is within the range of 10 ° to 45 °, and the flat surface width D is 5.0 mm or less. Since the surface 2C and the workpiece-side inclined surface 2A intersect with each other at an angle, the trim W-side inclined surface 2B and the flat surface 2C intersect even if the electrode sheet B is partially formed, as well as the workpiece W having burrs. Neither cutting on the side of the ridgeline or uncut portions were observed.

  Further, even if the convex curved portion 2D is not formed and the flat surface 2C and the trim-side inclined surface 2B are crossed at an angle, or even if the convex curved portion 2D is formed, the radius of curvature r is 0. Fine burrs and burrs were observed when the thickness exceeded 5 mm, whereas such fine burrs and burrs were not observed when the radius of curvature r was in the range of 0.05 mm to 0.5 mm. It was possible to cut the workpiece W, which is a high-quality product. In addition, the result of Table 1-Table 3 was the same also in the test piece which affixed any of Al foil, Cu foil, and stainless steel foil.

DESCRIPTION OF SYMBOLS 1 Die cut roll 2 Blade type 2A Workpiece side inclined surface 2B Trim side inclined surface 2C Flat surface 2D Convex curve part 3 Die roll main body 11 Anvil roll 12 Anvil roll main body S Workpiece W Work T Trim A Resin film B Electrode sheet C Blade Mold center line O1 Die axis O2 Anvil axis α Work side angle β Trim side angle D Flat surface width r Curvature radius of convex curve section 2D

Claims (3)

A blade die is formed on the outer peripheral surface of a cylindrical die roll body rotated around the die axis so as to protrude from the outer peripheral surface and extend on the outer peripheral surface. The blade die and an anvil axis parallel to the die axis A sheet-like workpiece inserted between the die roll body and the anvil roll body is made into a product from the workpiece by the outer peripheral surface of the cylindrical anvil roll body of the anvil roll rotated around. A die cut roll of a rotary die cutter that performs shearing so that a workpiece can be pulled out, wherein the blade mold has a cross section orthogonal to the direction in which the blade mold extends on the outer peripheral surface of the die roll main body. And a pair of inclined surfaces inclined so as to approach each other toward the blade center line perpendicular to the die axis, and connected to the outer peripheral side of the pair of inclined surfaces. And an angle formed by the pair of inclined surfaces with respect to the blade center line in the cross section. The workpiece side angle of the workpiece side inclined surface facing the workpiece side is the trim side angle of the trim side inclined surface facing the trim side which is the end object after the workpiece is extracted from the workpiece opposite to the workpiece side. And the workpiece side angle is in the range of 1 ° to 15 °, the trim side angle is in the range of 10 ° to 45 °, and the workpiece side inclined surface and the flat surface are And the flat surface width between the intersection of the trim side inclined surface and the flat surface or the intersection of the extension lines of the trim side inclined surface and the flat surface is 5.0 mm or less. Flat surface and workpiece side While the inclined surfaces intersect with each other at an angle, the intersecting ridge line portion between the trim-side inclined surface and the flat surface is a convex curved portion in contact with the trim-side inclined surface and the flat surface. A die-cut roll of a rotary die cutter characterized by that.   The die cut roll of the rotary die cutter according to claim 1, wherein the flat surface width is in a range of 0.3 mm to 3.0 mm. In the cross section, the flat surface between the radius of curvature of the convex curved portion is, the intersection between the workpiece-side inclined surface and the flat surface, the intersection of the extension line between the said trim side inclined surface and the flat surface The die cut roll of the rotary die cutter according to claim 1 or 2, wherein the die cut roll is not more than a width and is in a range of 0.05 mm to 0.5 mm.

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