JP2001170720A - Apparatus and method for working metal foil having slit, and metal foil having slit worked thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for working a metal foil having a slit in which the metal foils having the slit such as lath net are continuously and stably manufactured from a plate at a high speed by a simple action, and provided with a burred portion and a hole portion to improve the close adhesivity of an active substance to a base material, and no exposed burrs pierce a separator to cause defective insulation or short-circuit. SOLUTION: A pair of cylindrical rolls 20 and 22 are engaged with each other with a work 13 held therebetween, have a cutting blade 26 extending in the axial direction of the rolls on an outer circumferential part thereof, and are rotated in a synchronous manner with each other. A non-cutting part 26a is provided in a staggered manner at least on one cutting blade of the cylindrical rolls, a slit extending in the axial direction is formed in the work in a staggered manner, and the work between the slits is deformed along the cutting blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus and a method for continuously producing a metal foil with a slit such as a lath net from a plate material and a metal foil with a slit.

[0002]

2. Description of the Related Art An electrode plate composed of a positive electrode plate and a negative electrode plate, such as a nickel-hydrogen battery and a nickel-cadmium battery, is provided on both sides of a substrate (hereinafter, referred to as an electrode substrate) composed of a thin metal plate having a large number of through holes. A material filled with an active material is used. For example, in the case of a cylindrical battery, this electrode plate is built in the battery by spirally winding a strip-shaped positive electrode plate and a negative electrode plate via a separator.

As an electrode substrate, for example, a lath net exemplified in FIG. 14 has been conventionally used. As shown in this figure, a lath net 1 (or metal lath) has a diamond-shaped mesh 3 surrounded by four strands 2, and a bond in which four strands gather at the front, rear, left and right vertices of the mesh 3. It is a net-like member having a portion 4. In this drawing, B is the strand width, Bw is the width of the bond portion, and Lw is the horizontal width of the mesh. Hereinafter, the lath net and the slit net are collectively referred to as “slit metal foil”.

A method for manufacturing such a lath net is disclosed in Japanese Patent Publication No. 58-1983.
No. 23166, Japanese Patent Publication No. 58-7372,
41112, JP-B-53-42310, JP-A-58
No. 32529, and the like.

[0005] In Japanese Patent Publication No. 58-23166, "metal lath manufacturing method", as shown in FIG. 15A, a metal plate a is extended from a fixed blade 5 by a width B of a strand, and a movable blade 6 is extended.
This is a manufacturing method in which the extended portion is cut by the vertical movement of and a rhombic mesh surrounded by four strands is arranged.

As shown in FIG. 15B, a "metal lath manufacturing apparatus" disclosed in Japanese Patent Publication No. 58-7372 has a corrugated top formed by continuously disposing trapezoidal peaks having straight portions and inclined portions. Using the punch 7a, (a) first lower the upper punch to make a cut, (b) further press down the strand portion, and then raise the upper punch to feed the length corresponding to the width B of the strand. At the same time, the upper punch is shifted in the width direction, and (c)
Next, the upper punch 7a is lowered and cut and cut down at the same time as described above to form a continuous lath.

Japanese Unexamined Patent Publication No. Sho 57-41112 discloses a "metal lath mesh forming cutter", as shown in FIG. 16A, which comprises a plurality of circular blade plates 8a fitted around the outer periphery of a rotating shaft.
And a spacer 8b that keeps the distance between adjacent circular blade plates constant, and a plurality of grooves 8c are formed at equal angles from the outer periphery of both surfaces of the circular blade plate toward the center, and between adjacent grooves on one surface. The groove formed on the other surface is located, and the peripheral edge of the blade plate between adjacent grooves serves as a cutting blade.

As shown in FIG. 16B, a "roll for producing mesh material" disclosed in JP-B-53-42310 is used as a means for cutting in advance and expanding and expanding the strands on the outer peripheral surface of the disk cutter 9a. After the knife length corresponding to the above is equally distributed in the circumferential direction, and in the axial direction, a cut is made by a pair of upper and lower disk cutters 9a equally spaced at a pitch corresponding to the strand diameter (wire width), and then the workpiece is processed. To produce a lath material from a plate material by gripping the end portion and expanding in the direction perpendicular to the cut.

Japanese Patent Application Laid-Open No. 58-32529 discloses a "method for producing a multipurpose expanded metal material".
After the cut is made in the same manner as in No. 10, the end of the workpiece is gripped and expanded in the direction perpendicular to the cut, and further rolled by rolling rollers to return to the original flat shape.

Further, as means for manufacturing an electrode substrate other than a lath net, for example, JP-A-06-142787, JP-A-07
Means such as JP-A-130370 and JP-A-10-106580 have been proposed.

[0011] Japanese Patent Application Laid-Open No. 06-142787, entitled "Porous Metal Foil, Method for Producing the Same, and Laminate Using It"
As shown in the figure, the metal foil material 13 is applied to each cylindrical surface 11a.
A large number of punching cones 12 are continuously transferred while being pressed by a pair of rotating rollers 11 projecting so as to be able to mesh with each other. A large number of holes 14 having breaking projections 15 are alternately penetrated from both sides. In other words, this processing means passes the metal foil 13 between a pair of upper and lower rolls 11 having the cone 12 projecting therefrom so that the break projections formed by the cone 12 project alternately in a staggered and up-down direction. This is a method for producing a porous metal foil that is punched out through a metal foil.

Japanese Patent Application Laid-Open No. 07-130370 discloses a "coating type electrode and a method of manufacturing the same", in which a lower die 16 having a punch 16a and an upper die 17 having a recess 17a are formed as shown in FIG. The metal plate 13 is sandwiched between the metal plates 1
3 is pierced from one side or both sides, and as shown in FIG. 18B, a burr 13a is formed around the perforated hole 14, and the apparent thickness T including the burr is the thickness of the original metal plate. At least twice as large as t. That is, this processing means pierces the metal plate 13 from one side or both sides by a pair of upper and lower punches 16a and upper and lower dies 16 and 17 of the concave portion 17a, forms burrs 13a around the perforated holes, and forms the burrs 13a of the original thickness. The apparent thickness is about twice as large.

Japanese Patent Application Laid-Open No. 10-106580 discloses a method for manufacturing a substrate for a battery electrode and a substrate for a battery electrode, for example, as shown in FIG. A pair of rotating rollers including a pair of rollers 18 and a rubber roller 19 having a smooth outer peripheral surface are provided, and a thin metal sheet 13 is sequentially passed between the two sets of rotating rollers to form a first set of rotating rollers. When the rubber roller is pressed against the convex portion of one of the rollers at the time of passing,
As shown in (B), a hole 14 is made in the metal sheet 13 and burrs 13a projecting to one side of the peripheral edge of the hole are generated. A hole is formed and a burr that protrudes from the periphery of the hole to the other side is generated. That is, in this processing means, an embossing roller 18 in which conical protrusions are arranged in a staggered pattern on the outer periphery, and a cylindrical rubber roll 19 pressed against the upper portion of the embossing roll and a horizontal position on the delivery side, and a porous electrode for electrode having burrs protruding therefrom. Make holes.

[0014]

[Problems to be solved by the invention] (1) Japanese Patent Publication No. 58-2
No. 3166 and Japanese Patent Publication No. 58-7372,
A lower punch 7b (or fixed blade 5) having a straight fixed blade,
Upper punch 7a in which trapezoidal mountain-shaped blades are continuously arranged evenly
(Or the moving blade 6), the upper punch is raised, shifted, and intermittently conveyed to the workpiece to form a continuous lath. Therefore, each operation is complicated, and the quality is not stable and continuous. There was a problem that was difficult. Therefore, in such a means, when a lath net having a particularly fine pitch (for example, about 0.25 mm) is manufactured, the manufacturing speed is about 100 mm / mi even if a high-speed operation is performed at 400 strokes / min.
There is a problem that the productivity is too low because it is only about n.

The manufacturing means using the cylindrical cutters disclosed in JP-A-57-41112, JP-B-53-42310 and JP-A-58-32529 are characterized by a shearing step for making a cut, There is a problem that two processes, that is, an expansion process of gripping, pulling, and expanding are required. That is, since the direction of the notch in the shearing step and the direction of expansion in the expanding step are orthogonal to each other, continuous production is difficult, and there is a problem limited to the cut material. Also, for the diameter expansion process,
It is necessary to leave the grip portion at the width end as a plate material, and there has been a problem that the yield is too low in the case of parts that require overall lathing.

The present invention has been made to solve such a problem. That is, a first object of the present invention is to provide an apparatus and a method for processing a metal foil with a slit capable of producing a metal foil with a slit such as a lath net continuously and stably from a plate material with a simple operation. It is in.

(2) JP-A-06-142787 mentioned above.
JP-A-07-130370 and JP-A-10-10
In the processing means of No. 6580, the burrs 13 are formed around the holes.
a is generated, and an active substance is entangled in the burr portion and the hole portion to improve the adhesion to the base material. However, in an actual battery, for example, a cylindrical battery, it is necessary to provide a part that does not entangle the active substance in a part of the base material, and to contact this part with a battery casing or the like. In this case, the exposed burr 13
There is a problem that a may break through a separator (made of thin paper) separating the positive electrode plate and the negative electrode plate, resulting in poor insulation or short circuit.

The present invention has been made to solve such a problem. That is, the second object of the present invention is to provide a burr portion and a hole portion for improving the adhesion between the active substance and the base material, and there is no possibility that the exposed burr will break through the separator and cause insulation failure or short circuit. An object of the present invention is to provide an apparatus and a method for processing a metal foil with a slit.

[0019]

In order to achieve the first object, according to the present invention, there is provided a cutting blade (2) which meshes while sandwiching a workpiece (13) therebetween and extends in the axial direction of a roll.
And a pair of cylindrical rolls (20, 22) having an outer peripheral portion and driven in synchronization with each other, and at least one cutting blade of the cylindrical roll has a staggered non-cutting portion (26a).
Wherein a slit extending in the axial direction is formed in the workpiece in a staggered manner, and the workpiece between the slits is deformed along the cutting blade. An apparatus is provided.

Further, according to the present invention, a pair of cylindrical rolls (20, 22) having at least one cutting blade (26) provided with a non-cutting portion (26a) in a staggered manner is formed on a workpiece (1).
3) rotating while being engaged with each other while sandwiching therebetween, forming slits extending in the axial direction in the workpiece in a staggered manner, and deforming the workpiece between the slits along the cutting blade;
A method for processing a metal foil with a slit is provided.

According to the apparatus and method of the present invention, a pair of cylindrical rolls (20, 20) having a cutting blade (26) on the outer periphery is provided.
22) is interlocked and synchronously rotated while the workpiece (13) is sandwiched therebetween, so that the non-cut portions (26a) provided in a staggered manner extend in the axial direction of the workpiece. The slits can be formed in a staggered manner, and the workpiece between the slits can be deformed along the cutting blade.
Therefore, the metal foil with slits can be continuously manufactured at high speed and stably from the plate material by a simple operation merely by rotating and driving the cylindrical roll.

According to a preferred embodiment of the present invention, a stretching device (28) is provided downstream of the cylindrical rolls (20, 22) to stretch the workpiece in the processing direction, whereby the cylindrical rolls (20, 22) are provided. The workpiece on the downstream side of the workpiece is elongated in the processing direction, and the slit portion of the workpiece is extended to form a lath shape. With this device and method, the stretching device (2
According to 8), the workpiece can be formed into a lath shape by simply extending the workpiece in the processing direction and extending the slit portion of the workpiece.

The stretching device (28) includes a dressing roll (29) that is driven to rotate in synchronization with the cylindrical rolls (20, 22), and a rubber roll (30) that clamps a workpiece between the dressing roll. ) And a dressing roll (2
9) Work material is sandwiched between the rubber roll (30) and
The dressing roll (2) is synchronized with the cylindrical rolls (20, 22).
9) is rotated at a peripheral speed higher than that of the cylindrical roll. With this apparatus and method, the work material is stretched in the processing direction only by rotating the dressing roll (29) in synchronization with the cylindrical rolls (20, 22) at a higher peripheral speed than the cylindrical roll,
The slit portion of the workpiece can be extended to form a lath shape.

In order to achieve the second object, according to the present invention, the cutting blade (26) has a rectangular or trapezoidal shape, and a valley between the cutting blades has an axial interval. It has a conical part (21) provided at a distance, and has a concave part (23) provided at an interval in the axial direction on the peak part of the cutting blade. And is configured to receive the conical portion in a position aligned with the portion. Further, with a rectangular or trapezoidal cutting blade (26), slits extending in the axial direction are formed in the workpiece in a staggered manner, and the workpiece between the slits is deformed along the cutting blade. The conical portion (21) provided in the valley between the cutting blades is fitted into the concave hole (23) provided in the ridge of the cutting blade, so that the conical portion (21) is formed inside the ridge and the valley of the cutting blade. Form protruding burrs.

According to the apparatus and method of the present invention, while the workpiece (13) is cut into a zigzag slit by the engagement of the cutting blades (26), the cutting blades (26) are formed inside the peaks and valleys of the cutting blades. Since a burr is formed on the surface of the burr, the burr and hole are provided to improve the adhesion between the active material and the base material. Metal foil can be processed. Further, the first object can be substantially achieved by the apparatus and the method. Furthermore, since the formed metal foil with a slit can easily bend a rectangular or trapezoidal bent part and wind it to a small diameter, a fine crack is formed in the active material applied to the metal foil with a slit by this winding. And the associated effect of increasing its activity can also be obtained.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the common parts in the respective drawings, and the duplicate description will be omitted.

FIG. 1 is an overall configuration diagram of a processing apparatus according to the present invention. As shown in this figure, a metal foil processing apparatus with a slit 10 of the present invention includes a pair of cylindrical rolls 20 and 22 that are driven to rotate in synchronization with each other, and a work material provided downstream of the cylindrical rolls 20 and 22. And a stretching device 28 for stretching the sheet 13 in the processing direction (the rotation direction of the roll). The stretching device 28
In this example, a dressing roll 29 that is driven to rotate in synchronization with the cylindrical rolls 20 and 22 and the gear train 21, and a rubber roll 30 that sandwiches the workpiece 13 between the dressing roll 29.
Consists of The dressing roll 29 is formed by the gear train 21.
Is set faster (for example, 2: 1) than the peripheral speed of the cylindrical rolls 20 and 22.

The dressing roll 29 may be a convex roll having fine projections on its surface, or a relatively hard rubber roll. When a hard rubber roll is used for the dressing roll 29, soft rubber is used for the rubber roll 30. With this configuration, the workpiece 13 is sandwiched between the dressing roll 29 and the rubber roll 30, and the rubber rolls 29, 30 are deformed along the shape of the workpiece 13, thereby forming the workpiece 13 (slit metal foil). The slit portion can be elongated in the processing direction (roll rotation direction) while maintaining the shape.

FIG. 2 is a view showing a first embodiment of a cylindrical roll constituting the present invention. In this figure, (A) is a plan view showing the roll surface of the cylindrical roll 20, (B) is a BB sectional view thereof, and (C) is a CC sectional view. The cylindrical roll 22 meshing with the cylindrical roll 20 has the same shape. FIGS. 3A and 3B are explanatory diagrams of the operation of slitting by the cylindrical roll of FIG.
2 shows the processing steps of the workpiece 13 at two positions shifted in the axial direction 0 and 22. As shown in FIGS. 2 and 3, the cylindrical rolls 20 and 22 each have a cutting blade 26 on the outer periphery that extends in the axial direction of the roll. The cutting blades 26 mesh with the workpiece 13 while sandwiching the workpiece 13 therebetween.
6, a slit extending in the axial direction of the roll is formed in the workpiece 13. As the workpiece 13, a thin metal foil having a thickness of, for example, about 25 to 50 μm is used. In this embodiment, the cutting blade 26 of the lower cylindrical roll 20 is provided with a non-cutting portion 26a in a staggered manner. The non-cutting portion 26a can be provided, for example, by forming a cutout or a spilled portion in a part of the cutting blade 26 extending continuously.

FIGS. 3A and 3B show the cylindrical roll 20.
Are different in the position of the non-cutting portion 26a. As shown in this figure, when the workpiece 13 is sandwiched between the upper and lower cylindrical rolls 20 and 22 and the rolls are rotated in synchronization, the upper and lower cutting blades 2 are rotated.
6, the workpiece 13 is partially sheared into a slit shape,
And it remains without being sheared at the position of the non-cut portion 26a. Therefore, only by rotating the upper and lower cylindrical rolls 20 and 22,
The slits extending in the axial direction can be formed in the workpiece 13 in a staggered manner. Further, since the workpiece 13 before and after the slit is formed is sandwiched between the cutting blades 26 and deformed, the slit-opened metal foil having the slit portion is processed.

FIG. 4 is a drawing (A) showing an extension operation of the slit net formed in FIG. 3 and a shape diagram (B) of the formed metal foil with slit. The dressing roll 2 of the stretching device 28 described above.
When the workpiece 13 (slit net) slit in FIG. 3 is sandwiched between the rubber roll 9 and the rubber roll 30, the dressing roll 29 is rotated by the gear train 21 faster than the peripheral speed in synchronization with the cylindrical rolls 20 and 22. As shown in FIG. 4 (A), the peaks of the dressing roll 29 stretch the slit net in the roll feed direction to form a lath net as shown in FIG. 4 (B). The structure of the stretching device 28 is not limited to the example shown in FIG. 1. For example, a slit net may be pulled by a pinch roll or the like at a higher peripheral speed than the cylindrical rolls 20 and 22.

Using the above-described apparatus, a pair of cylindrical rolls 20 and 22 having a cutting blade 26 on the outer peripheral portion are meshed with each other while the workpiece 13 is interposed therebetween, and are synchronously driven to rotate. By the non-cut portions 26a provided in the shape, the slits extending in the axial direction are formed in the workpiece in a staggered manner, and the workpiece 13 between the slits can be deformed along the cutting blade. Therefore, the metal foil with slits can be continuously manufactured at high speed and stably from the plate material by a simple operation merely by rotating and driving the cylindrical roll.

Further, the work piece 1 can be
By simply extending the workpiece 3 in the processing direction (the rotation direction of the roll), the slit portion of the workpiece 13 can be extended to form a lath shape.

FIG. 5 is a view showing a second embodiment of the cylindrical roll constituting the present invention. In this figure, (A) is a plan view showing the roll surface of the cylindrical roll 20, (B) is a BB sectional view thereof, and (C) is a CC sectional view. The same applies to the cylindrical roll 22 that meshes with the cylindrical roll 20. FIG. 6 is an explanatory view of the operation of slitting by the cylindrical roll of FIG. As shown in FIGS. 5 and 6, the cylindrical rolls 20 and 22 each have a cutting blade 26 on the outer peripheral portion extending in the axial direction of the roll, similarly to the first embodiment. The cutting blade 26 meshes while holding the workpiece 13 therebetween, and forms a slit extending in the axial direction of the roll in the workpiece 13 by shearing by the upper and lower cutting blades 26.
In this example, both cutting blades 26 of the cylindrical rolls 20 and 22 are provided with non-cutting portions 26a offset from each other.

FIGS. 6A and 6B show, similarly to FIG. 3, two axially displaced positions of the cylindrical rolls 20 and 22. The point that the upper and lower rolls have a non-cut portion 26a is shown. The configuration is different, and the other configuration is the same as that of the first embodiment.
That is, the non-cut portion 26a indicated by a two-dot chain line in FIG.
Indicates the position of the non-cut portion of the upper cylindrical roll 22. With this configuration, as in the first embodiment, only by rotating the upper and lower cylindrical rolls 20 and 22, the work 13
The slits extending in the axial direction can be formed in a zigzag pattern. Also, the workpiece 1 before and after the slit is formed.
Since the metal foil 3 is sandwiched between the cutting blades 26 and deformed, a metal foil with a slit having an opened slit is processed.

FIG. 7 is a drawing (A) showing the stretching operation of the slit net formed in FIG. 6 and a shape diagram (B) of the formed metal foil with slit. As shown in this drawing, the work material 13 (slit net) slit in FIG. 6 is sandwiched between the dressing roll 29 of the stretching device 28 and the rubber roll 30, and the dressing roll 29 is turned by the gear train 21 into the cylindrical roll 20. When the motor is driven to rotate faster than its peripheral speed in synchronism with the motor 22, FIG.
As shown in FIG. 7, the peaks of the dressing roll 29 stretch the slit net in the roll feed direction, and a lath net similar to that of the first embodiment is formed as shown in FIG. 7B.

FIG. 8 is a view showing a third embodiment of the cylindrical roll constituting the present invention. In this figure, (A) is a plan view showing the roll surface of the cylindrical roll 20, (B) is a BB sectional view thereof, and (C) is a CC sectional view. The same applies to the cylindrical roll 22 that meshes with the cylindrical roll 20. FIG.
The cutting blade 26 of the cylindrical roll 20 shown in FIG. 3 has a shape in which the non-shear sides of the two cutting blades of the second embodiment are connected. The non-cutting portion 26a is formed by the upper and lower cylindrical rolls 2 as in the second embodiment.
0 and 22 are provided offset in the width direction. Other configurations are the same as in the second embodiment.

FIG. 9 is an explanatory view (A), (B) and (C) of the operation of slitting by the cylindrical roll of FIG. 8 and a shape diagram (D) of the formed slit net. In this figure,
(A) is an AA sectional view including the roll of (D), (B) is a BB sectional view, and (C) is a CC sectional view. As is clear from FIG. 9, similarly to the first and second embodiments, the workpiece 13 can be obtained by simply rotating the upper and lower cylindrical rolls 20 and 22.
The slits extending in the axial direction can be formed in a zigzag pattern. Also, the workpiece 1 before and after the slit is formed.
3 is sandwiched between the cutting blades 26 and deformed, so that the metal foil with slit (FIG. 9C) having the slit portion opened is processed.

According to the above-described second and third embodiments, a pair of cylindrical rolls 20 and 22 are disposed between the pair of cylindrical rolls 20 and 22.
By interlocking and rotating synchronously while pinching the workpiece 3 therebetween, slits extending in the axial direction are formed in the workpiece 13 in a zigzag manner, and the workpiece 13 between the slits is formed along the cutting blade. Can be deformed. Further, by simply extending the workpiece 13 in the processing direction (the direction of rotation of the roll) by using the stretching device 28 together, the slit portion of the workpiece 13 can be extended to form a lath shape.

FIG. 10 is a view showing a fourth embodiment of the cylindrical roll constituting the present invention, and FIG. 11 is an explanatory view of the operation of slitting by the cylindrical roll of FIG. 10 and the shape of the formed slit net. It is. In this embodiment, the cutting blade 2
6 is formed in a rectangular or trapezoidal shape in which the non-shear sides of the two cutting blades are connected as in the third embodiment. Further, in this example, the conical portion 21 is provided in the valley portion between the cutting blades 26 at an interval in the axial direction, and the concave portion 23 is provided in the peak portion of the cutting blade 26 at an axial interval. Is provided. Further, the concave hole 23 of one roll is located at a position matching the conical portion 21 of the other roll, and the concave holes 23 aligned with each other are formed so as to accommodate the conical portion 21. Other configurations are the same as those of the first to third embodiments.

According to the fourth embodiment, the burrs 13a projecting inwardly into the peaks and valleys of the cutting blade 26 while the workpiece 13 is cut into the staggered slits by the engagement of the cutting blade 26 therebetween. Is formed, a burr portion and a hole portion for improving the adhesion between the active substance and the base material are provided, and the exposed burr 13a is a metal foil with a slit which is not likely to break through the separator and cause insulation failure or short circuit. Can be processed. At the same time, the first object can be substantially achieved by the fourth embodiment. Furthermore, since the formed metal foil with a slit can easily bend a rectangular or trapezoidal bent part and wind it to a small diameter, a fine crack is formed in the active material applied to the metal foil with a slit by this winding. And the associated effect of increasing its activity can also be obtained.

FIG. 12 is a schematic view of a slit-clad metal foil processed according to the above-described first to third embodiments. In this figure, (A), (B), and (C) represent first, second, and second, respectively.
It is a metal foil with a slit according to the third embodiment. Also,
In each of the figures, the right figures are slit nets without stretching by the stretching device, and the left figures are lath nets after stretching. Further, the lower part of the right and left figures is a sectional view thereof. As is clear from FIG. 12, these metal foils with slits have slits extending in a direction perpendicular to the rotation direction of the roll, and the slits are arranged in a staggered manner. By simply extending the slit net processed by the roll forming in the processing direction, the slit portion of the workpiece can be elongated to form a lath net.

FIG. 13 is a schematic view of a metal foil with a slit processed according to the fourth embodiment. In this figure,
(B) is a slit net without stretching by a stretching device,
(A) is a lath net after stretching, and the lower part of each figure is a cross-sectional view thereof. As is apparent from FIG. 13, in the metal foil with slits, burrs protruding inward are formed at the cut peaks and valleys, so that the burrs and holes improve the adhesion between the active substance and the base material. Burr 13a having a portion and exposed
However, there is no danger of breaking through the separator or the like and causing insulation failure or short circuit. Further, similarly to the first to third embodiments, a slit extending in a direction perpendicular to the roll rotation direction is provided, and the slits are arranged in a staggered manner.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, the description has been given mainly of the metal foil with slits used as the battery substrate. However, the present invention is not limited to this, and can be freely applied to other uses.

[0045]

As described above, the apparatus and method for processing a metal foil with a slit according to the present invention can produce a metal foil with a slit, such as a lath net, from a plate material continuously and at high speed and stably with a simple operation. The resulting metal foil with a slit has a burr portion and a hole portion for improving the adhesion between the active substance and the base material, and there is no possibility that the exposed burr will break through the separator to cause insulation failure or short circuit. Has an excellent effect.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a metal foil processing apparatus with a slit according to the present invention.

FIG. 2 is a view showing a first embodiment of a cylindrical roll constituting the present invention.

FIG. 3 is an operation explanatory view of slit processing by the cylindrical roll of FIG. 2;

FIG. 4 is a drawing showing a stretching operation of the slit net formed in FIG. 3 and a shape diagram of the formed metal foil with slits.

FIG. 5 is a view showing a second embodiment of the cylindrical roll constituting the present invention.

FIG. 6 is an explanatory view of an operation of slit processing by the cylindrical roll of FIG. 5;

FIG. 7 is a drawing showing an extension operation diagram of the slit net formed in FIG. 6 and a shape diagram of the formed metal foil with slits.

FIG. 8 is a view showing a third embodiment of the cylindrical roll constituting the present invention.

FIG. 9 is an explanatory view of the operation of slit processing by the cylindrical roll of FIG. 8 and a shape diagram of a formed slit net.

FIG. 10 is a view showing a fourth embodiment of the cylindrical roll constituting the present invention.

11A and 11B are an explanatory view of an operation of slit processing by the cylindrical roll of FIG. 10 and a shape diagram of a formed slit net.

FIG. 12 is a schematic view of a metal foil with a slit processed according to the first to third embodiments.

FIG. 13 is a schematic view of a metal foil with a slit processed according to the fourth embodiment.

FIG. 14 is a configuration diagram of a lath net (metal lath).

FIG. 15 is a configuration diagram of a conventional lath processing apparatus using a flat blade.

FIG. 16 is a configuration diagram of a conventional lath processing apparatus using a rotary blade.

FIG. 17 is a schematic view of a conventional means for processing a perforated plate.

FIG. 18 is a schematic view of another conventional perforated plate processing means.

FIG. 19 is a schematic view of another conventional perforated plate processing means.

[Explanation of symbols]

1 lath net, 2 strands, 3 mesh, 4 bond section, 5 fixed blade, 6 moving blade, 7a upper punch, 7b
Lower punch, 8a circular blade plate, 8b spacer, 8c
Groove, 9a Disk cutter, 10 Metal foil processing device with slit, 11 Rotary roller, 11a Cylindrical surface, 12 Drilling cone, 13 Work material (metal foil material, metal plate), 13
a Burr, 14 holes, 15 protrusions, 16 lower mold, 16a
Punch, 17 upper mold, 17a recess, 18 roller,
19 rubber roller, 20, 22 cylindrical roll, 21 conical part, 23 concave hole, 26 cutting blade, 26a non-cutting part, 2
8 stretching device, 29 dressing roll, 30 rubber roll

Claims (9)

[Claims] 1. A pair of cylinders which have a cutting blade (26) which meshes with a workpiece (13) interposed therebetween and extends in the axial direction of a roll on an outer peripheral portion, and is driven to rotate synchronously. Rolls (20, 22), and at least one cutting blade of the cylindrical roll is provided with a non-cutting portion (26a) in a staggered manner, whereby slits extending in the axial direction are formed in the workpiece in a staggered manner. And a material to be processed between the slits is deformed along a cutting blade, and a metal foil-equipped processing apparatus is provided. 2. A stretching device (28) is provided downstream of the cylindrical rolls (20, 22) to stretch a workpiece in a processing direction, whereby a slit portion of the workpiece is extended to form a lath shape. The apparatus for processing a metal foil with a slit according to claim 1, wherein: 3. The stretching device (28) includes a dressing roll (29) that is driven to rotate in synchronization with the cylindrical rolls (20, 22), and a rubber roll (30) that holds a workpiece between the dressing roll. 3. The apparatus for processing a metal foil with slits according to claim 2, wherein the apparatus comprises: 4. The cutting blade (26) has a rectangular shape or a trapezoidal shape, and has troughs (21) provided at axially spaced intervals in valleys between the cutting blades. In addition, the crest of the cutting blade has recesses (23) provided at intervals in the axial direction, and one of the recesses is located at a position aligned with the other cone and accommodates the cone. 4. The apparatus for processing a metal foil with a slit according to claim 1, wherein the metal foil is formed as follows. 5. A pair of cylindrical rolls (20, 22) in which at least one of the cutting blades (26) is provided with a non-cutting portion (26a) in a staggered manner while holding a workpiece (13) therebetween. Meshing and rotating, forming slits extending in the axial direction in the workpiece in a staggered manner, and deforming the workpiece between the slits along the cutting blade, wherein the metal foil with a slit is characterized by the following: Processing method. 6. The work material on the downstream side of the cylindrical roll (20, 22) is stretched in a working direction, and a slit portion of the work material is extended to form a lath shape. The method for processing the metal foil with slit according to the above. 7. A dressing roll (29) and a rubber roll (3).
0) and the cylindrical roll (20, 2).
The method for processing a metal foil with slits according to claim 6, wherein the dressing roll (29) is rotated at a peripheral speed higher than that of the cylindrical roll in synchronization with 2). 8. A rectangular or trapezoidal cutting blade (26),
Slits extending in the axial direction are formed in the workpiece in a zigzag manner, the workpiece between the slits is deformed along the cutting blade, and further, a cone (2) provided in a valley between the cutting blades is formed.
1) fitting 1) into a concave hole (23) provided in a peak portion of a cutting blade to form an inwardly projecting burr in a peak portion and a valley portion of the cutting blade. 8. The method for processing a metal foil with slits according to 5 to 7. 9. A metal foil with a slit processed according to any one of claims 1 to 8.