JP2002203756A - Manufacturing system of capacitor device member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a comb-shaped capacitor device member which is formed of several rectangular pieces of metal foil joined to each other by joining a long tape-shaped metal foil to a metal guide member without damaging the metal foil. SOLUTION: The system for manufacturing a comb-shaped capacitor device member which is formed of several rectangular pieces of metal foil joined to a guide member has an automatic feeding mechanism for feeding the tape- shaped metal foil by a constant length toward the guide member, a mechanism for joining the metal foil to the guide member, and a mechanism for cutting the joined metal foil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a capacitor element used for manufacturing a single-plate capacitor element. More specifically, an apparatus for manufacturing a comb-shaped capacitor element member formed by joining a rectangular metal foil having a predetermined length as a valve metal to a metal guide (guide member), and a metal used for the apparatus. The present invention relates to an automatic foil feeding device, a metal foil cutting device, and a metal foil obtained by the cutting device.

[0002]

2. Description of the Related Art In recent years, the performance of electronic devices has been improved and their miniaturization and portability have been progressing. In particular, a capacitor used in an output smoothing circuit of a power supply has a low impedance in a high frequency range and an equivalent series resistance (ESR).
Value).

A solid electrolytic capacitor using a conductive polymer as an electrolyte can be made into a small-capacity, low-impedance, low-ESR capacitor by stacking single-plate capacitor elements. Proposed.

Conventionally, as a method of manufacturing a single-plate capacitor element used for a solid electrolytic capacitor, a wide metal foil is used.
This is punched out to form a comb-teeth shape in which a plurality of projections that become a capacitor element and its support part are integrated, and after fixing the support part to a pedestal plate etc., processing of the capacitor element part is performed, and this part is There has been proposed a method of separating and laminating the layers (JP-A-5-166681, etc.). In addition, a method has been proposed in which a metal foil is processed into a predetermined shape by photoetching or the like, then processed as a capacitor element single plate, and laminated (Japanese Patent Laid-Open No. 9-36003). However, these methods have problems that the economic efficiency is insufficient and the production efficiency is low.

In contrast to the above-mentioned conventional manufacturing method, a long tape-shaped metal foil is connected to a side edge of a metal plate or a metal wire (guide member) at right angles to the length direction thereof and cut to a predetermined length. This is repeated to form a comb-like shape in which a large number of metal foils are joined in parallel to the guide member, and after a dielectric oxide film layer, a semiconductor layer, and a conductor layer are sequentially formed on the surface of these metal foils, The present inventors have proposed a method of separating a metal foil from a guide member and using it as a solid electrolytic capacitor element [Japanese Patent Laid-Open No. 4-17318 (Japanese Patent No. 2828317)].
issue)〕. This method has an advantage that the manufacturing efficiency is good and the solid electrolytic capacitor element can be manufactured at low cost.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a manufacturing apparatus for carrying out the above-mentioned manufacturing method with high productivity, and is formed by joining a rectangular metal foil serving as a valve metal to a metal guide (guide member). An object of the present invention is to provide an apparatus for manufacturing a comb-shaped capacitor element member with high productivity. Further, in this manufacturing process, when the metal foil is simply shear-cut, burrs and cracks are easily generated on the cut surface, and the metal foil is damaged.
Such a damage of the foil causes a decrease in the characteristics of the single-plate capacitor element, and causes a problem that the production efficiency of the solid electrolytic capacitor, particularly the multilayer solid electrolytic capacitor, is reduced. A mechanism is provided for retreating from the cutting position by forming the fins, thereby providing an apparatus that suppresses the occurrence of burrs and cracks. Also, if the electrode of the welding machine becomes dirty during welding of the metal foil, it becomes difficult to continuously weld. Therefore, an automatic polishing mechanism for the electrode is provided to provide a manufacturing apparatus capable of joining the metal foil continuously and accurately. I do.

Further, the present invention provides an automatic feeding device having a fixed size feeding mechanism for automatically feeding a long tape-shaped metal foil for a fixed length so as to implement the manufacturing device of the capacitor element member with high productivity. I do. In addition, since the long tape-shaped metal foil is thin, the foil is easily cut or the surface of the foil is easily damaged.Therefore, preferably, a means for preventing the cutting of the foil or the damage of the foil surface is provided. An object of the present invention is to provide a metal foil automatic feeder capable of feeding a long length of tape-shaped metal foil wound on a reel in a fixed length with good positional accuracy without damaging or deforming the metal foil in a step of joining the foils.

Further, the present invention provides an apparatus for cutting a long tape-shaped metal foil and a method for cutting a metal foil used in the apparatus for manufacturing a capacitor element member. In a conventional cutting device, a capacitor element sheet is cut using a cutter or a dicing saw (Japanese Patent Application Laid-Open No. 9-260218), or cut by a laser beam (Japanese Patent Application Laid-Open No. 5-299309) to manufacture a capacitor element. However, when cutting with a cutter or dicing saw, deformation such as sagging or cracking is likely to occur on the cut surface, and an etching layer (dielectric layer) of metal foil
The damage to the cut surface is large, such as peeling off. Such damage to the foil causes a reduction in the characteristics of the single-plate capacitor element, and causes a problem that the manufacturing efficiency of the multilayer solid electrolytic capacitor is reduced. Laser cutting causes relatively little damage to the cut surface, but has the problems of expensive equipment, high manufacturing cost, and large equipment.

The present invention provides a cutting apparatus and a cutting method which do not cause such damage to a metal foil and hardly cause burrs, cracks or deformation of a cut surface.

That is, the present invention relates to an apparatus for manufacturing a capacitor element member having the following configuration, an automatic metal foil feeding apparatus and a metal foil cutting apparatus used in the apparatus, a metal cutting method, and a metal foil obtained by the method. .

1. A device for manufacturing a capacitor element member used for manufacturing a single-plate capacitor element, comprising: an automatic feeding mechanism for feeding a metal foil at a fixed length toward a guide member; a mechanism for bonding a metal foil to a guide member; and a bonded metal foil. An apparatus for manufacturing a capacitor element member, comprising: a mechanism for cutting a capacitor element. 2. 2. The capacitor according to item 1, wherein the automatic feeding mechanism has a fixed-size feeding mechanism for feeding the metal foil at a fixed length, a slack mechanism for adjusting the slack of the metal foil drawn from the reel, and a positioning mechanism for adjusting a feeding position of the metal foil. Device manufacturing equipment. 3. Automatic feeding mechanism, fixed-size feeding mechanism that sends out metal foil at a fixed length, slack mechanism that adjusts slack of metal foil drawn from reel, positioning mechanism that adjusts sending position of metal foil,
2. The apparatus for manufacturing a capacitor element member according to item 1, further comprising a mechanism for removing dust on the surface of the metal foil. 4. 4. The apparatus for manufacturing a capacitor element member according to any one of the above items 1 to 3, wherein the joining mechanism has welding means. 5. Item 5. The apparatus for manufacturing a capacitor element member according to Item 4, wherein the welding means of the joining mechanism is spot welding. 6. Item 5. The apparatus for manufacturing a capacitor element member according to Item 4, wherein the joining mechanism is continuous spot welding, and further has an electrode polishing mechanism. 7. 7. The apparatus for manufacturing a capacitor element member according to any one of the above items 1 to 6, wherein the cutting mechanism is a shearing cut that sandwiches and cuts a metal foil. 8. 7. The apparatus for manufacturing a capacitor element member according to any one of the above items 1 to 6, wherein the cutting mechanism is a shearing cutting in which a metal foil is sandwiched and cut, and a mechanism for forming a gap between the cutting blades after cutting and retracting the cutting blade. 9. 9. The apparatus for manufacturing a capacitor element member according to any one of the above items 1 to 8, wherein an automatic feeding mechanism, a cutting mechanism, and a joining mechanism are sequentially arranged along a metal foil feeding direction. 10. The preceding items 1 to 8, in which an automatic feed mechanism, a joining mechanism, and a cutting mechanism are sequentially arranged along the metal foil sending direction.
An apparatus for manufacturing a capacitor element member according to any one of the above. 11. The metal foil is fed by the automatic feeding mechanism until the tip reaches the guide member, and then the metal foil tip is pressed against the guide member by the joining mechanism and welded.
By cutting the metal foil to a certain length by the cutting mechanism and repeating a series of operations from sending out the metal foil to cutting, a plurality of rectangular metal foils are joined to the guide member to form a comb-shaped capacitor element member. An apparatus for manufacturing a capacitor element member according to any one of the above items 1 to 10, which is manufactured. 12. A metal foil automatic feeder used in a single-plate capacitor element member manufacturing apparatus, comprising at least a pair of pinch rollers for sandwiching and feeding a tape-shaped metal foil, means for rotating the pinch roller at a constant speed, and driving means therefor. An automatic metal foil feeding device, comprising a fixed length feeding mechanism comprising: 13. 13. The metal foil automatic feeder according to the above item 12, wherein the fixed-size feed mechanism is formed by a pinch roller, a pinion gear provided at the shaft end thereof, a rack gear meshing with the pinion roller, and a driving unit connected to the rack gear. 14． 13. The metal foil automatic feeder according to the above item 12, wherein the sizing feed mechanism is formed by a pinch roller, a pulley provided at the shaft end thereof, a power transmission belt mounted on the pinch roller, and a stepping motor connected to the belt. . 15. A reel for winding and holding a long tape-shaped metal foil,
15. The automatic metal foil feeding device according to any one of the above items 12 to 14, further comprising an automatic loosening mechanism including the rotating means and a position sensor disposed between the reel and the pinch roller. 16. A slide table arranged along the feeding direction of the metal foil, means for pressing the table sideways with respect to the feeding direction of the metal foil, and a stand on the upper surface of the table so as to control the feeding width of the metal foil. 16. The metal foil automatic feeder according to any one of items 12 to 15, further including a horizontal positioning mechanism including a roll-shaped bearing provided. 17． 17. The metal foil automatic feeder according to any one of the above items 12 to 16, further comprising a vertical positioning mechanism for preventing the metal foil from floating on the slide table. 18. 18. The metal foil automatic feeder according to any one of items 12 to 17, further comprising a dust removing mechanism including an injection unit that blows gas onto the surface of the metal foil to blow off dust on the surface, and a suction pipe that sucks the blown dust. 19. A metal foil cutting device used in a single-plate capacitor element member manufacturing apparatus, comprising a pair of vertically movable blades for sandwiching the metal foil, and one of the blades is pressed against the other blade by elastic force to support the shaft. Further, means for pushing one of the blades apart against this elastic force is provided, whereby a mechanism for separating and retracting the cutting blade after cutting is formed. Cutting device. 20. Item 20. The metal foil cutting device according to Item 19, wherein the means for generating an elastic force is a metal spring, an air spring, or a rubber elastic body. 21. Item 20. The metal foil cutting device according to Item 19, wherein the elastic force is a spring force. 22. The upper blade and the lower blade sandwiching the metal foil, the frame supporting the upper blade and the lower blade, the frame has a vertical moving means,
The lower blade has its base end axially attached to the root of the upper blade via a spring and its distal end axially attached to the lower blade frame via a spring. The metal according to any one of the preceding items 19 to 21, wherein the metal is formed so as to be rotatable about its base end, and further provided with a pressing rod for pressing the base end of the lower blade away from the upper blade. Foil cutting equipment. 23. What is claimed is: 1. A shearing method in which a metal foil used for manufacturing a single-plate capacitor element is sandwiched and cut, wherein a gap is formed between the cutting blades after cutting, and the cutting blade is separated and retracted. 24. 24. The method for cutting a metal foil according to the above item 23, wherein the metal foil is a valve metal foil of a single-plate capacitor element. 25. Valve metal foil is made of aluminum, tantalum, titanium,
25. The method for cutting a metal foil according to the above item 24, which is a thin foil of niobium or an alloy thereof. 26. 26. The method for cutting a metal foil according to any one of the above items 23 to 25, wherein a gap between the cutting blades is in a range of 0.1 to 1.0 mm. 27. A metal foil obtained by the cutting method according to any one of the above items 23 to 26. 28. 28. The metal foil according to the above item 27, wherein a crack width of a cut surface of the metal foil is 0.1 mm or less. 29. 28. The metal foil according to the above item 27, wherein a crack width of a cut surface of the metal foil is 0.05 mm or less. 30. 28. A capacitor element having a derivative oxide film layer, a semiconductor layer, and a conductor layer on a surface of the metal foil according to the above item 27.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments shown in the drawings. FIG. 1 is a schematic perspective view showing the overall configuration of a manufacturing device for a capacitor element member according to the present invention, FIGS. 2 and 3 are schematic side views of an automatic feed mechanism (apparatus), and FIG. 4 is a positioning means provided in the automatic feed mechanism. FIG. 5 is a schematic perspective view of a cutting mechanism (device), and FIG.
(A)-(h) is explanatory drawing of a series of operation | movement from joining of metal foil to cutting. In FIGS. 1 and 5, the frame of the cutting mechanism is partially cut away.

An apparatus for manufacturing a capacitor element member according to the present invention shown in FIG. 1 includes an automatic feeding mechanism 10 for feeding a long tape-shaped metal foil 1 toward a guide member 3 at a constant length. And a mechanism 40 for cutting the bonded metal foil 1 to a fixed length.
This is an apparatus for manufacturing a comb-shaped capacitor element member in which a plurality of cut rectangular metal foils 2 are joined to a side end of a guide member 3 in parallel. Using this member, a dielectric oxide film layer, a semiconductor layer, and a conductor layer are sequentially formed on a rectangular metal foil 2, and this metal foil 2 is finally cut and separated from a guide member to form a single-plate solid electrolytic capacitor. Used as an element.
The apparatus for manufacturing a capacitor element member of the present invention is an apparatus used in a manufacturing line for such a solid electrolytic capacitor element.

In the apparatus configuration shown in FIG. 1, the metal foil 1 is disposed so as to be fed out to the side in the moving direction of the guide member 3, and the automatic feeding mechanism 10 is moved along the feeding direction. , A positioning mechanism 30, a cutting mechanism 40, and a joining mechanism 50 are sequentially arranged. The guide member 3 is located in front of the cutting mechanism 40, and the joining mechanism 5 is located above the guide member 3.
0 is provided. Hereinafter, each mechanism or an example of an apparatus having the mechanism will be specifically described.

(A) Automatic Feeding Apparatus FIG. 7 is a partial external perspective view showing a metal foil automatic feeding apparatus used in the apparatus for manufacturing a capacitor element member according to the present invention, and FIG.
Is a schematic diagram of an automatic loosening mechanism, FIGS. 9 and 3 are schematic diagrams of a fixed size feeding mechanism, FIGS. 10 to 12 are schematic diagrams of a horizontal and vertical positioning mechanism of a metal foil, and FIG. 13 is a schematic diagram of a dust removing mechanism. is there.

A metal foil automatic feeder 10 according to the present invention shown in FIG.
Means for winding and holding a long tape-shaped metal foil 1 and an automatic loosening mechanism 1 for pulling out the metal foil 1 without damaging or deforming it.
5, a fixed-size feeding mechanism 20 for feeding the metal foil 1 at a constant length;
It is constituted by a positioning mechanism 30 for determining the horizontal and vertical positions of the metal foil fed by the fixed size. The positioned metal foil 1 is guided to the joining / cutting device 40, and is cut into a certain length after the tip of the metal foil 1 is joined to the side end of the metal guide 3, and this joining and cutting are repeated in order to repeat the metal cutting. A comb-shaped member in which a large number of metal foils 2 are joined in parallel at the side end of the guide 3 is formed. Using this member, a dielectric oxide film layer, a semiconductor layer, and a conductor layer are sequentially formed on a metal foil portion, and this metal foil is finally cut and separated from a guide member and used as a single-plate solid electrolytic capacitor element. Can be The metal foil automatic feeding device is a device for feeding a long tape-shaped metal foil to a joining and cutting device in such a production line.

The long tape-shaped metal foil 1 wound on the reel 11 is guided to a sizing feed mechanism 20, and the automatic feeding device 10 of the present invention moves the metal foil between the reel 11 and the sizing feed mechanism 20. Automatic loosening mechanism 15 so that no tensile force is generated on the foil
Having. An automatic loosening mechanism 15 shown in FIG. 8 includes a reel 11 for winding and holding a long tape-shaped metal foil 1, rotating means 12, and a pinch roller for rotating while sandwiching the metal foil 1 drawn from the reel 11. 13 and reel 11
And a position sensor 14 disposed between the pinch roller 13 and the pinch roller 13. The position sensor 14 detects the vertical position of the tape-shaped metal foil 1 that has been pulled out, and an upper limit sensor 14a disposed above the metal foil 1 and a metal foil 1
And a lower limit sensor 14b disposed below the lower limit. In general, a non-contact type sensor such as a photo sensor is used for these sensors.

When a tensile force is applied to the metal foil, problems such as breakage and expansion of the foil to change the foil capacity occur.
For this reason, the rotating means 12 rotates the reel 11 in the feeding direction so that no tensile force is generated between the reel 11 and the fixed-size feeding mechanism 20, and the drawn metal foil 1 is always slackened. Keep it in condition. When the amount of slack is small and the metal foil 1 is pulled upward,
The upper limit sensor 14a detects this state, and
And the reel 11 is rotated in the sending direction to increase the slack of the metal foil 1. On the other hand, if the slack amount of the metal foil 1 is too large, there is a problem that the foil comes into contact with the table and becomes dirty or scratched. Therefore, the lower limit sensor 14b detects the metal foil 1 and sends a command to the rotating means 12. The rotation of the reel 11 is restricted to reduce the slack of the metal foil 1.

The sizing feed mechanism 20 is means for feeding the tape-shaped metal foil 1 at a fixed length, and includes at least a pair of pinch rollers 2 for sandwiching and feeding the tape-shaped metal foil 1.
1 and 22, means for rotating the pinch rollers 21 and 22 at a constant speed, and driving means therefor. FIG.
In the example shown in FIG. 1, a one-way clutch is built in the drive roller 21 located below the metal foil 1 among the pinch rollers 21 and 22, and a pinion gear 23 is
Is mounted, and a rack gear 24 meshing with the rack gear 24 is provided. Drive means 25 such as an actuator is connected to the rack gear 24. In addition, the pinch roller 2
It is preferable to use a synthetic resin which does not damage the metal foil and has low abrasion in order to maintain the accuracy of the feed length.

In the sizing feed mechanism 20, the metal foil 1
Is pinched vertically by a driving pinch roller 21 and a driven pinch roller 22, and a pinion gear 23 is rotated in response to a reciprocating motion of a rack 24 by a certain length by an actuator 25 or the like. Is transmitted to the drive roller 21, and the metal foil 1 is fed out by a fixed length integrally with the driven roller 22. In the example shown in FIG. 9, the one-way clutch is engaged, the roller 21 rotates, and the metal foil 1 is fed only when the rack 24 is raised. When the rack 24 descends, the clutch is disengaged and no metal foil is fed. This rack 2
The feed length of the metal foil 1 is determined by the moving distance of the metal foil 1. In addition, the actuator 25 is not limited by a driving method such as an air cylinder or a cam drive, and may be any.
In addition, the driving / following relationship between the driving roller 21 and the driven roller 22 may be reversed, and both may be driving rollers.

The sizing feed mechanism 20 shown in FIG. 3 is an example in which a stepping motor 29 is used as an actuator and a timing belt 27 is used instead of a rack gear. A power transmission belt 27 is mounted between a pulley 26 provided at the shaft end of the pinch roller 22 and a pulley 28 connected to a stepping motor 29. It is preferable to use a toothed belt for this belt. The number of rotations of the motor 29 is controlled by a pulse or the like, and an accurate equi-rotational angular movement is transmitted to the pinch roller 21 in small increments, and the pinch rollers 21 and 22 rotate at a constant speed to feed the metal foil 1 by a fixed length.

The metal foil 1 supplied from the reel 11 is not restrained by the slack mechanism 15 described above. Therefore, in order to weld the metal foil 1 to a predetermined position of the metal guide 3, it is preferable to have the following positioning mechanism. FIG.
12 includes a slide table 31 disposed along the feeding direction of the metal foil 1 and means for pressing the table 31 laterally with respect to the feeding direction of the metal foil 1 (pressing rod). ) 36, a horizontal positioning mechanism composed of a roll-shaped bearing (miniature bearing) 32 erected on the upper surface of the table 31 so as to control the feed width of the metal foil 1, and pressing the metal foil 1 against the upper surface of the table 31. It has a vertical positioning mechanism to prevent lifting.

Roll-shaped bearings 32 are provided on both sides of the metal foil 1 on the upper surface of the table 31 (two pairs in the illustrated example), and the horizontal position of the metal foil 1 is regulated by the bearings 32. You. The slide table 31 is mounted on a stand 37 so as to be able to slide sideways in the feeding direction of the metal foil 1, and a pressing rod 36 is provided in this sliding direction. The pressing rod 36 is the table 3
The frame 31 is supported by a frame 35 located on the side of the table 1 via a spring 38, and the table 31 is pressed to the side by this spring force. The pressing force is controlled by adjusting the screwing amount of the pressing rod 36, and the horizontal position of the table 31 is adjusted. The spring 38 is not limited to a metal spring, but may be any elastic body having an elastic force.

In the illustrated example of the apparatus, four guide rollers 34 forming a vertical positioning mechanism are arranged above the table 31. The guide roller 34 is pivotally supported by a stand 37 so as to rotate in the feeding direction of the metal foil 1, and maintains a gap of several tens of microns from the surface of the metal foil on the upper surface of the table so as to suppress the floating of the metal foil. Installed. The vertical positioning mechanism is not limited to the guide roller 34 and may be formed by a plate-shaped or belt-shaped member. In the illustrated example of the apparatus, the fixed-size feed mechanism 2 moves in the feed direction from the reel 11 side.
0, a positioning mechanism 30 is provided.
May be provided.

Further, chips or the like generated at the time of slitting may adhere to the surface of the slit metal foil 1. The metal foil automatic feeder of the present invention preferably has a mechanism 52 for removing the dust. The dust removing mechanism 52 shown in FIG. 13 is formed by an injection means 53 for blowing gas onto the surface of the metal foil 1 to blow off dust, and a suction pipe 54 for sucking the blown dust. The spraying means 53 may be formed by a spraying nozzle provided toward the surface of the metal foil and a means for supplying a compressed gas (such as air).
The mechanism 52 is covered with a cover (not shown) so as to prevent scattering of dust due to the compressed gas. The dust removed from the surface of the metal foil may be sucked by a vacuum cleaner or the like through the suction pipe 54 and removed outside the system. In addition,
The dust removing mechanism 52 can be appropriately provided between the automatic loosening mechanism 15, the fixed-size feeding mechanism 20, and the positioning mechanism 30, but is preferably provided between the automatic loosening mechanism 15 and other mechanisms.

(B) Cutting Apparatus FIG. 14 is a schematic perspective view showing the structure of a long tape-shaped metal foil cutting apparatus used in the apparatus for manufacturing a capacitor element member according to the present invention, and FIG. 15 shows its operating state. FIG. 14 and 15A to 15D, the frame of the cutting mechanism is partially cut away.

The cutting device shown in FIG. 14 is a device for shear cutting by sandwiching a metal foil. After cutting, a gap is formed between the cutting blades, and the cutting blades are separated and retracted. Further, the cutting device has a pair of vertically movable blades sandwiching the metal foil, one of the blades is pressed against the other blade by elastic force and is axially supported. Means for pushing and separating the blade is provided, whereby a mechanism for separating and retracting the cutting blade after cutting is formed.

In the present cutting device, one blade is pressed against the other blade by elastic force and is supported by the other blade. In general, elastic force is the force by which an elastic body that has undergone elastic deformation due to an external force tries to undo the deformation. Rubber elastic bodies such as natural rubber, vulcanized rubber, and silicone rubber, coil springs, leaf springs, and spiral springs For example, a metal spring or an air spring utilizing the elasticity of air can be used. In particular, metal springs can be used as mechanical elements. The apparatus shown in FIG. 14 uses a metal spring.

In the illustrated device example, the cutting device 40 has an upper blade 41 and a lower blade 42 arranged so as to sandwich the tape-shaped metal foil 1 vertically, and the upper blade 41 is an upper blade frame. 43 are integrally formed. On the other hand, the lower blade 42
One end (base end) 42a is pivotally attached to the upper blade frame 43 via a spring 45, and the other end (distal end) 42b is pivotally attached to the holding frame 44 via a spring 46. Each of these frames 43 and 44 is connected to a driving means (not shown) such as an actuator, and is formed to be vertically movable. The lower blade 42 is pressed against the upper blade 41 by springs 45 and 46 provided at both ends thereof, and is formed so that a gap (clearance) does not occur between the upper blade 41 and the lower blade 42 during cutting. I have.

The cutting device 40 is provided with a mechanism for causing the cutting blade to create a clearance and to retreat after cutting. The retracting mechanism is formed by a pressing rod 47 that pushes the lower blade 42 back against the spring force. The pressing rod 47 is installed so as to protrude toward the base end of the lower blade 42, and is connected to a driving means 48 such as an actuator in a reciprocating manner. The tip of the pressing rod 47 is the upper blade 4
The tip of the rod 47 is formed to extend downward so as not to come off from the lower blade 42 due to the vertical movement of the lower blade 1 and the lower blade 42. Note that the pressing rod 47 may be installed on the tip end side of the lower blade 42 or on both ends thereof.

As shown in FIG. 15 (A), when the holding frame 44 rises with the metal foil 1 sandwiched between the upper blade 41 and the lower blade 42, the lower blade 42 attached to the frame 44 is pivoted. Of the upper blade 41 is pushed up together.
The lower blade 42 rotates about a base end 42a that is axially mounted near the root of the lower blade 42. The rotation of the lower blade 42 cuts the metal foil 1 sandwiched between the upper blade 41 and the lower blade 42 (FIG. 15B).

After the cutting of the metal foil 1, the pressing rod 47 protrudes forward by the driving means 48 and pushes the lower blade 42 back to the holding frame side against the spring force (FIG. 15C).
A clearance (L) is generated between the upper blade 41 and the upper blade 41 (FIG. 15C). The lower blade 42 descends to the standby position while maintaining the clearance (L) (FIG. 15D). Therefore, damage to the cut surface of the metal foil can be suppressed as much as possible, and deformation of the cut surface and occurrence of burrs or cracks can be prevented. In addition, clearance (L) is 0.1 ~
The range may be 1.0 mm, preferably 0.2 to 0.8 mm, and more preferably 0.3 to 0.7 mm. The width of the cracks formed on the cut surface of the metal foil by this retraction mechanism is preferably 0.1 to 1.0 times, more preferably 0.1 to 0.8 times, more preferably 0.1 times the thickness of the metal foil. It can be suppressed to the range of 1 to 0.5 times.

The material of the blade is suitably higher than the metal foil, such as stainless steel, ceramics, diamond, high-speed steel and cemented carbide, and high-speed steel, stainless steel or ceramics is preferable. The tape-shaped metal foil is made of aluminum, tantalum, titanium, niobium or an alloy thereof as a valve metal of a single-plate capacitor element. The thickness of the metal foil is 10 to 300 μm, preferably 10 to 200 μm, and more preferably 10 to 200 μm. ~ 120 μm
Is suitable. The width of the metal foil is 0.5 to 10
0 mm, preferably in the range of 1 to 50 mm.

Using a cutting device (cutting unit) of the present invention shown in FIG. 14, commercially available dressing scissors, dissecting scissors, and a paper cutting machine, each of the aluminum foils (width 3 mm, thickness 10 mm).
0 μm). Micrographs of each cut surface are shown in FIG.
This is shown in FIGS. 17, 18, 19A, and 19B. The width of the cut surface using the cutting unit of the present invention is 0.0.
It was 45 mm (FIG. 16), and almost no cracks occurred. On the other hand, the crack width of the cut surface using commercially available scissors was 0.116 mm (FIG. 17), the crack width of the cut surface using dissection scissors was 0.150 mm (FIG. 18), and a paper cutting machine was used. The crack width of each of the cut surfaces was 0.113 mm (FIGS. 19A and 19B), and the crack width was about three times larger than that using the cutting unit of the present invention.

(C) Joining mechanism In FIG. 1, reference numeral 50 denotes a joining mechanism for joining the tip of the metal foil 1 to the guide member 3, and has mechanical joining such as caulking, solder welding, resistance welding, laser welding means and the like. . For continuous joining of metal foils, a spot welder, a laser welder, or the like is preferable. Further, a spot welding machine is preferable from the viewpoint of economy. As shown in FIG. 1, the head (electrode) 51 of the welding machine is provided above the guide member 3 so as to be vertically movable. Preferably, an automatic polishing means (not shown) for the electrode 51 is provided to enable continuous welding.
The welding head 51 moves up and down in accordance with the feeding state of the metal foil 1 and the operation of the cutting mechanism, and welds the tip of the metal foil 1 to the guide member 3.

Next, the operation of joining and cutting by the joining mechanism 50 will be described. As shown in FIG.
In FIG. 6A, the tape-shaped metal foil 1 is fed out by the automatic feeding mechanism 10 by a predetermined length, and when the leading end of the metal foil 1 reaches the side end of the guide member (FIG. 6B), the welding head 51 is lowered to remove the metal foil 1. The tip is pressed against the guide member and welded (FIG. 6)
c). After welding, the welding head 51 rises and leaves the welding location, while the upper blade 41 descends to the cutting position (FIG. 6d).
Next, the lower blade 42 rises, and cuts the metal foil 1 in a state where the lower blade 42 is in close contact with the upper blade 41 (FIG. 6E). After the cutting, the lower blade 42 is pushed back by the pressing rod 47, and a gap is formed between the lower blade 42 and the upper blade 41 (FIG. 6F). The lower blade 42 retreats downward while maintaining this gap (FIG. 6g), the upper blade 41 returns upward (FIG. 6h), returns to the original position, and stands by for the next cutting operation. The electrode is polished by the automatic polishing apparatus while the welding head 51 having returned to the original position is lowered again.

The metal foil 1 is cut, and the upper blade 41 and the lower blade 42
Is retracted to the original position, the guide member 3 is sent forward by a predetermined length, and waits for the next metal foil to be joined next to the joined rectangular metal foil 2. Next, the apparatus of the present invention repeats a series of the above welding operations, and sequentially joins the rectangular metal foil 2 to the side end of the guide member 3 to manufacture the comb-shaped capacitor element member 4.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. The device configuration can be variously changed without departing from the technical idea of the present invention.

[0039]

According to the manufacturing apparatus of the present invention, the metal foil is sent out for a fixed length without damaging the metal foil, and the tip of the metal foil is continuously joined to the metal guide member, and this metal foil is subjected to burrs and cracks. Can be cut while minimizing the occurrence of such a phenomenon, so that a single-plate capacitor element can be manufactured with high productivity.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the overall configuration of a manufacturing apparatus according to the present invention.

FIG. 2 is a schematic side view of a metal foil automatic feeder according to the present invention.

FIG. 3 is a schematic side view of an automatic metal foil feeding device using a stepping motor.

FIG. 4 is a schematic plan view of a positioning means provided in the metal foil automatic feeding device.

FIG. 5 is a schematic perspective view of an apparatus for cutting a long tape-shaped metal foil according to the present invention.

FIG. 6 is an explanatory diagram of an operation from joining to cutting of a metal foil.

FIG. 7 is a partial external perspective view showing a metal foil automatic feeder according to the present invention.

FIG. 8 is a schematic diagram of an automatic loosening mechanism.

FIG. 9 is a schematic view of a fixed-size feeding mechanism using a gear mechanism.

FIG. 10 is a schematic plan view of a positioning mechanism.

FIG. 11 is a schematic front view of a positioning mechanism.

FIG. 12 is a schematic side view of a positioning mechanism.

FIG. 13 is a conceptual diagram of a dust removing mechanism.

FIG. 14 is a schematic perspective view showing a configuration of a cutting device according to the present invention.

15 (A), (B), (C) and (D) are step diagrams showing steps of the cutting action.

FIG. 16 is a micrograph showing a cut surface of a metal foil by the cutting device of the present invention.

FIG. 17 is a photomicrograph showing a cut surface of a metal foil using dressmaking scissors.

FIG. 18 is a micrograph showing a cut surface of a metal foil using dissecting scissors.

FIGS. 19A and 19B are photomicrographs showing a cut surface of a metal foil using a paper cutter.

[Explanation of symbols]

1, 2 metal foils; 3 metal guides; 10 metal foil automatic feeder; 11 reel; 12 reel rotating means;
13 Pinch roller; 14 Position sensor; 15 Automatic slack mechanism; 20 Fixed-size feed mechanism; 21, 22 Pinch roller; 23 Pinion gear;
5 Actuator; 26, 28 Pulley; 27 Belt; 29 Stepping motor; 30 Positioning mechanism; 31 Slide table;
34 guide roller; 35 frame; 36 pressing rod; 37 stand; 38 spring; 40 joining and cutting device; 41 upper blade; 42 lower blade; 43,44 frame; 45,46 spring;
8 drive means; 51 welding machine head (electrode); 52
Dust removal mechanism; 53 Injecting means; 54 Dust suction pipe

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Ishii 6850 Omachi Omachi, Omachi City, Nagano Prefecture Showa Denko Co., Ltd., Omachi Production and Engineering Division (72) Inventor Atsushi Sakai 6850 Omachi Omachi Omachi City, Nagano Prefecture Showa Denko F-term (reference) in Omachi Production & Engineering Division, 5E082 EE03 MM11

Claims (30)

[Claims] 1. An apparatus for manufacturing a capacitor element member used for manufacturing a single-plate capacitor element, comprising: an automatic feeding mechanism for feeding a metal foil at a fixed length toward a guide member; and a mechanism for joining the metal foil to the guide member. An apparatus for manufacturing a capacitor element member, comprising a mechanism for cutting a bonded metal foil. 2. The automatic feeding mechanism according to claim 1, wherein the automatic feeding mechanism has a fixed-length feeding mechanism for feeding the metal foil at a fixed length, a slack mechanism for adjusting the slack of the metal foil drawn from the reel, and a positioning mechanism for adjusting a feeding position of the metal foil. Item 2. An apparatus for manufacturing a capacitor element member according to item 1. 3. An automatic feeding mechanism for feeding a metal foil at a fixed length, a slack feeding mechanism for adjusting slack of a metal foil drawn from a reel, a positioning mechanism for adjusting a feeding position of a metal foil, and a metal. The apparatus for manufacturing a capacitor element member according to claim 1, further comprising a mechanism for removing dust on a foil surface. 4. The apparatus for manufacturing a capacitor element member according to claim 1, wherein the joining mechanism has welding means. 5. The apparatus according to claim 4, wherein the welding means of the joining mechanism is spot welding. 6. The joining mechanism is a continuous spot welding,
The apparatus for manufacturing a capacitor element member according to claim 4, further comprising an electrode polishing mechanism. 7. The apparatus for manufacturing a capacitor element member according to claim 1, wherein the cutting mechanism is a shearing cutting that cuts by sandwiching a metal foil. 8. The capacitor element according to claim 1, wherein the cutting mechanism is shear cutting in which a metal foil is sandwiched and cut, and has a mechanism for forming a gap between the cutting blades after cutting and retracting. Equipment for manufacturing components. 9. The apparatus for manufacturing a capacitor element member according to claim 1, wherein an automatic feeding mechanism, a cutting mechanism, and a joining mechanism are sequentially arranged along a feeding direction of the metal foil. 10. The apparatus for manufacturing a capacitor element member according to claim 1, wherein an automatic feeding mechanism, a joining mechanism, and a cutting mechanism are sequentially arranged along a feeding direction of the metal foil. 11. A metal foil is fed by a predetermined length by an automatic feeding mechanism until the tip of the metal foil reaches the guide member, and then the metal foil is pressed against the guide member by a joining mechanism and welded. Claims A plurality of rectangular metal foils are joined to a guide member to produce a comb-shaped capacitor element member by shearing the foil to a certain length and repeating a series of operations from feeding of the metal foil to cutting. The apparatus for manufacturing a capacitor element member according to any one of 1 to 10. 12. A metal foil automatic feeder used in a device for manufacturing a single-plate capacitor element member, comprising: at least a pair of pinch rollers for sandwiching and feeding a tape-shaped metal foil; and means for rotating the pinch roller constantly. A metal foil automatic feeder, which has a fixed-size feed mechanism including the driving means and feeds the metal foil at a fixed length. 13. The sizing feed mechanism according to claim 12, wherein the pinch roller is formed by a pinch roller, a pinion gear provided at a shaft end thereof, a rack gear meshing with the pinion roller, and driving means connected to the rack gear. Automatic metal foil feeder. 14. The sizing feed mechanism according to claim 12, wherein the pinch roller, a pulley provided at the shaft end thereof, a power transmission belt attached to the pinch roller, and a stepping motor connected to the belt. Metal foil automatic feeder. 15. An automatic slackening mechanism comprising a reel for winding and holding a long tape-shaped metal foil, a rotation means therefor, and a position sensor provided between the reel and a pinch roller. 15. The metal foil automatic feeder according to any one of claims 14 to 14. 16. A slide table arranged along a feeding direction of a metal foil, means for pressing the table laterally with respect to the feeding direction of the metal foil, and a device for controlling a feeding width of the metal foil. The metal foil automatic feeder according to any one of claims 12 to 15, further comprising a horizontal positioning mechanism including a roll-shaped bearing provided on the table upper surface. 17. A vertical positioning mechanism for preventing floating of a metal foil with respect to a slide table.
17. The automatic metal foil feeding device according to any one of claims 16 to 16. 18. A dust removing mechanism comprising an injection means for blowing gas onto the surface of the metal foil to blow off dust on the surface and a suction pipe for sucking the blown dust.
18. The metal foil automatic feeder according to any one of claims 17 to 17. 19. A metal foil cutting device used in a single-plate capacitor element member manufacturing apparatus, comprising a pair of vertically movable blades for sandwiching the metal foil, wherein one blade is connected to the other blade by elastic force. It is pressed and supported, and further provided is a means for pushing and separating one blade against this elastic force, thereby forming a mechanism for separating and retracting the cutting blade after cutting. Metal foil cutting device. 20. The metal foil cutting apparatus according to claim 19, wherein the means for generating an elastic force is a metal spring, an air spring, or a rubber elastic body. 21. The metal foil cutting device according to claim 19, wherein the elastic force is a spring force. 22. An upper blade and a lower blade for sandwiching a metal foil, a frame for supporting the upper blade and the lower blade, and a vertical moving means for the frame. And the distal end is axially mounted on the lower blade frame via a spring, so that the lower blade is in close contact with the upper blade and is rotatable around its base end. 22. The metal foil cutting device according to claim 19, further comprising a pressing rod for pressing the base end of the lower blade away from the upper blade. 23. A shear cutting method for sandwiching and cutting a metal foil used for manufacturing a single-plate capacitor element, wherein a gap is formed between the cutting blades after cutting, and the cutting blades are separated and retracted. Cutting method. 24. The method for cutting a metal foil according to claim 23, wherein the metal foil is a valve metal foil of a single-plate capacitor element. 25. The method according to claim 24, wherein the valve metal foil is a thin foil of aluminum, tantalum, titanium, niobium or an alloy thereof. 26. The metal foil cutting method according to claim 23, wherein a gap between the cutting blades is in a range of 0.1 to 1.0 mm. 27. A metal foil obtained by the cutting method according to claim 23. 28. The crack width of the cut surface of the metal foil is 0.1.
28. The metal foil according to claim 27, which is not more than mm. 29. The crack width of the cut surface of the metal foil is 0.0
28. The metal foil according to claim 27, which is 5 mm or less. 30. The surface of the metal foil according to claim 27,
A capacitor element having a derivative oxide film layer, a semiconductor layer and a conductor layer.