JP3920604B2 - Manufacturing method and apparatus for multilayer capacitor electrode foil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for manufacturing a multilayer capacitor electrode foil, and in particular, welds and fixes one end of a strip-shaped aluminum foil to a rectangular plate frame, and a plurality of laminated aluminum foils protruding from the rectangular plate frame Capacitor electrode foil is punched into a continuous comb shape at one end in the short direction of aluminum foil, so that a large number of multilayer capacitor electrode foils with uniform shape, pitch, dimensional accuracy, etc. can be manufactured in a short time In addition, the present invention relates to a method and an apparatus for manufacturing a multilayer capacitor electrode foil, which can be easily manufactured by stacking the multilayer capacitor electrode foil with high accuracy.
[0002]
[Prior art]
A multilayer capacitor is manufactured by laminating a plurality of sheets by interposing a silver paste between chemically treated aluminum foils that are electrode foils, attaching electrodes, molding them, and then cutting them one by one. Conventionally, multilayer capacitors have been manufactured efficiently and inexpensively by manufacturing a large number of capacitors at the same time. In FIG. 10, a plurality of (for example, 32) rectangular aluminum foils 1 are formed. Then, the sheet is conveyed in the direction of arrow a and welded to the rectangular plate frame 2 at a predetermined pitch, and about 8 sheets of aluminum foil 1 are overlapped with the silver plate 1 with the silver paste interposed therebetween while being welded to the rectangular plate frame 2. It has been produced. In order for the multilayer capacitor to exhibit predetermined electrical characteristics, it is necessary that the positions of all the laminated aluminum foils 1 are completely overlapped. Therefore, the shapes of the aluminum foils 1 are the same. Needless to say, the rectangular plate-like frame 2 is required to be welded at the same pitch.
[0003]
However, for example, it takes a long time to weld 32 rectangular aluminum foils 1 to the rectangular plate-shaped frame 2 one by one while aligning them. When welding is performed in a tilted state or when the aluminum foil 1 is deformed by welding after being welded, all the aluminum foils 1 are not stacked in a state where all the aluminum foils 1 are completely stacked. The used multilayer capacitor cannot exhibit sufficient electrical characteristics, becomes a defective product, and has a problem in that the production yield deteriorates.
[0004]
Further, when the aluminum foil 1 is subjected to chemical conversion treatment, electricity is caused to flow by bringing the electrodes into contact with the rectangular plate frame 2, but the conventional rectangular plate frame 2 and the aluminum foil 1 are welded only at one place. If it is not firmly welded, electricity does not flow through the aluminum foil 1 and the chemical conversion treatment is insufficient or no chemical conversion treatment is performed at all. The multilayer capacitor in which 1 is laminated has a defect of being a defective product.
[0005]
[Problems to be solved by the invention]
The present invention has been made in order to eliminate the above-described drawbacks of the prior art, and the object of the present invention is to fix a strip-shaped aluminum foil to a rectangular plate-shaped frame along the longitudinal direction. By punching a plurality of multilayer capacitor electrode foils into a continuous comb shape at one end in the short direction of the aluminum foil to produce multilayer capacitor electrode foils, all multilayer capacitor electrode foils have the same shape and pitch It is to be able to be molded easily.
[0006]
Another object of the present invention is to supply the strip-shaped aluminum foil without deformation by cutting the strip-shaped aluminum foil wound in a reel shape into a predetermined length. In other words, the multilayer capacitor electrode foil can be manufactured continuously and efficiently, and a multilayer capacitor having stable electric performance can be manufactured.
[0007]
Still another object is to fix a strip-shaped aluminum foil and a strip-shaped aluminum foil by welding one end of the aluminum foil in the short direction to the rectangular plate-shaped frame and fixing it. It is to weld aluminum foil at multiple locations to ensure electrical continuity, and when this is done, when electricity is formed into aluminum foil, electricity is passed through all multilayer capacitor electrode foils. It is to be able to carry out chemical conversion treatment, and to produce a multilayer capacitor having excellent electrical characteristics free from defective products.
[0008]
Another object is to convey the aluminum foil obtained by cutting a strip-shaped aluminum foil wound in a reel shape into a predetermined length by a cutting device to a rectangular plate-like frame supplied one by one by a frame supply device, After welding one end in the short direction of the strip-shaped aluminum foil with a welding device, a plurality of multilayer capacitor electrode foils are formed at one end in the short direction of the aluminum foil on the portion of the aluminum foil protruding from the rectangular plate frame by the press device. The multilayer capacitor electrode foil is manufactured by punching into a continuous comb shape so that the multilayer capacitor electrode foil having the same shape can be surely arranged at the same pitch by one press. This also allows multiple stacked capacitor electrode foils to be completely stacked and stacked. Unishi Te, significantly reduced the multilayer capacitor of the electric characteristic failure, to manufacture a multilayer capacitor having excellent low cost electrical characteristics continuously, and to improve the yield.
[0009]
[Means for Solving the Problems]
In short, the method of the present invention (Claim 1) is to fix a strip of aluminum foil to a rectangular plate-shaped frame along the longitudinal direction, and then attach the aluminum foil to one end in the short direction of the aluminum foil. In the above, the material is manufactured by punching into a continuous comb shape.
[0010]
In the method of the present invention (Claim 2), a strip-shaped aluminum foil wound in a reel shape is cut to a predetermined length, and the aluminum foil is welded and fixed to a rectangular plate frame along the longitudinal direction. Thereafter, the aluminum foil is manufactured by punching a plurality of multilayer capacitor electrode foils into a continuous comb shape at one end in the short direction of the aluminum foil.
[0011]
The apparatus of the present invention (Claim 3) includes a frame supply device that supplies rectangular plate frames one by one, and a welding device that welds and fixes one end of a strip-shaped aluminum foil to the rectangular plate frame in the short direction. And a pressing device for punching the strip-shaped aluminum foil into a comb-like shape in which a plurality of multilayer capacitor electrode foils are continuous at one end in the short direction of the aluminum foil.
[0012]
The apparatus of the present invention (Claim 4) includes a frame supply device that supplies rectangular plate frames one by one, a cutting device that cuts a strip-shaped aluminum foil wound in a reel shape into a predetermined length, and a cutting device. A transport device for transporting the strip-shaped aluminum foil to the rectangular plate-shaped frame to be transported, and a welding device for welding and fixing one end of the strip-shaped aluminum foil in the short direction to the rectangular plate-shaped frame; A pressing device for punching a plurality of multilayer capacitor electrode foils into a continuous comb shape at one end in the short direction of the aluminum foil at a portion protruding from the rectangular plate frame of the strip-shaped aluminum foil. It is what.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings. 1 to 4 and 8, the multilayer capacitor electrode foil manufacturing apparatus 10 according to the present invention includes a frame supply device 11, a cutting device 12, a transport device 13, a welding device 14, and a press device 15. I have.
[0014]
In FIG. 2, the frame supply device 11 is for supplying, for example, a rectangular plate frame 16 that is a stainless steel plate having a thickness of 1 mm, a width of 15 mm, and a length of 200 mm one by one. A mechanism (not shown) is arranged so as to be movable forward, backward, left and right within a horizontal plane. A pair of suction cup devices 19 are provided on the arm 18 of the lifting device 17, and the rectangular plate frames 16 are sucked one by one from a stock in which a large number of rectangular plate frames 16 are stacked by the suction cup 20. It is conveyed and supplied in the directions of arrows B, C, and D.
[0015]
In FIG. 1, the cutting device 12 is for cutting a strip-shaped aluminum foil 21 having a thickness of, for example, 0.02 mm and a width of 13.5 mm, which has been wound around a reel 23, into a predetermined length (for example, 163 mm). In this case, a cutter device 22 composed of a pair of blades is provided, and a strip-shaped aluminum foil 21 drawn out from a reel 23 is guided by a plurality of idlers 24, and is cut into a predetermined length by the cutter device 22. It is configured as follows.
[0016]
The transport device 13 is for transporting the strip-shaped aluminum foil 21 cut by the cutter device 22 to the welding device 14, and in FIG. 3, an elevating device 25 is disposed movably in the front-rear direction. The arm 26 of the lifting device 25 is provided with a suction device 27 having a length substantially the same as the length of the cut aluminum foil 21. By sucking air from the exhaust elbow 28 provided in the adsorption device 27 in the direction of arrow R, the aluminum foil 21 is adsorbed and held in the adsorption device 27 in a state where the aluminum foil 21 is flattened, deformed into the aluminum foil 21, etc. The sheet is conveyed in the directions of arrows H, I, and J without being damaged, and is supplied to the welding apparatus 14.
[0017]
The welding device 14 is for welding an aluminum foil 21 to a rectangular plate frame 16, and in FIGS. 4 to 7, a pair of rotating electrodes 28 are disposed so as to face each other in the vertical direction. The rectangular plate frame 16 and the aluminum foil 21 are sandwiched therebetween, and the electrode 28 is rotated while being applied with a high voltage from a power supply device (not shown) and conveyed in the direction of arrow M. Are configured to be welded at a plurality of locations.
[0018]
The welding between the rectangular plate frame 16 and the aluminum foil 21 is such that the aluminum foil 21 protrudes from the rectangular plate frame 16 by welding one end of the rectangular plate frame 16 and the aluminum foil 21 in the short direction. Welded. For example, welding of the strip-shaped aluminum foil 21 having a length of 163 mm is performed by spot welding the 12 welded portions 21b at a pitch of 14.5 mm, and there is one welded portion of the conventional multilayer capacitor electrode foil 1. Compared to the above (see FIG. 10), electrical conduction between the rectangular plate frame 16 and the aluminum foil 21 can be reliably ensured.
[0019]
The pressing device 15 is for punching a strip-shaped aluminum foil 21 into a comb shape in which a plurality of multilayer capacitor electrode foils 21a are continuous at one end. In FIG. 8, a female die 30 fixed to a base 29 is used. A belt-shaped aluminum foil 21 welded to the rectangular plate frame 16 is disposed between the female mold 30 and the male mold 31, and the hydraulic cylinder 33 is operated. Then, by lowering the male mold 31 in the direction of arrow N, a portion protruding from the rectangular plate frame 16 of the strip-shaped aluminum foil 21 is punched, and at one end in the short direction of the strip-shaped aluminum foil 21, a plurality of The multilayer capacitor electrode foil 21a is configured to be punched into a continuous comb shape. For example, in the strip-shaped aluminum foil 21 having a length of 163 mm, 32 multilayer capacitor electrode foils 21a are formed in a comb shape in FIG. 9, and one continuous end is spot welded to the rectangular plate frame 16 at 12 locations 21b. To be fixed.
[0020]
In the method of the present invention (Claim 1), after the strip-shaped aluminum foil 21 is fixed to the rectangular plate frame 16 along the longitudinal direction, the aluminum foil 21 is formed of a plurality of multilayer capacitor electrode foils 21a. This is a method of punching into a continuous comb shape at one end in the short direction.
[0021]
In the method of the present invention (Claim 2), the strip-shaped aluminum foil 21 wound around the reel 23 is cut into a predetermined length, and the aluminum foil 21 is welded to the rectangular plate frame 16 along the longitudinal direction. Then, the aluminum foil 21 is manufactured by punching the aluminum foil 21 into a continuous comb shape at one end in the short direction of the aluminum foil 21.
[0022]
The present invention is configured as described above, and the operation thereof will be described below. 1 and 2, the arm 18 of the lifting device 17, that is, the pair of suction cup devices 19 is lowered to bring the suction cups 20 into contact with the stacked rectangular plate frames 16 for suction, and in the directions of arrows B, C, and D , And further conveyed in the direction of arrow E to be supplied to the welding apparatus 14.
[0023]
On the other hand, the strip-shaped aluminum foil 21 is pulled out from the reel 23 and fed to the cutting device 12 in the direction of arrow F while being guided by a plurality of idlers 24, and the blades of the cutter device 22 are operated in the direction of arrow G to approach each other. The aluminum foil 21 is cut into a predetermined length, for example, 163 mm. In FIG. 3, the lifting / lowering device 25 is operated to suck air in the direction of arrow R from the exhaust elbow 28 provided in the adsorption device 27, and the aluminum foil 21 cut into a predetermined length is developed into a flat plate shape. Adsorbed in the state and transported in the directions of arrows H, I, and J, one end of the aluminum foil 21 in the short direction is overlapped with one end of the rectangular plate frame 16 in the short direction, as shown in FIG. As a state, it is supplied to the welding device 14.
[0024]
4 to 7, the pair of rotating electrodes 28 is moved in the direction in which they approach each other (arrow K and L directions), and the aluminum foil 21 and the rectangular plate frame 16 are sandwiched between the electrodes 28. The electrode 28 is rotated while being applied with a high voltage and conveyed in the direction of arrow M. Then, the rectangular plate frame 16 and the aluminum foil 21 are spot-welded by a plurality of welding portions 21 b, and the aluminum foil 21 is welded in a shape protruding from the rectangular plate frame 16.
[0025]
The rectangular plate frame 16 and the aluminum foil 21 spot-welded in the plurality of welds 21b are conveyed to the pressing device 15 in the direction of arrow M, and are rectangular plate-shaped between the female die 30 and the male die 31 in FIG. After the strip-shaped aluminum foil 21 welded to the frame 16 is positioned, the hydraulic cylinder 33 is operated to lower the male mold 31 in the direction of arrow N, and punch the strip-shaped aluminum foil 21 protruding from the rectangular plate-shaped frame 16. Process. That is, in FIG. 9, a plurality of multilayer capacitor electrode foils 21 a indicated by a solid line from a rectangle indicated by a virtual line are formed at the same pitch, and the plurality of multilayer capacitor electrode foils 21 a are formed at one end in the short direction of the strip-shaped aluminum foil 21. Punched into a continuous comb shape.
[0026]
In FIG. 1, a strip-shaped aluminum foil 21 welded to a rectangular plate frame 16 and punched to form a plurality of multilayer capacitor electrode foils 21a is rotated by 90 ° in the direction of arrow O so that the multilayer capacitor electrode foil 21a is rotated. After being directed downward, it is further conveyed in the direction of arrow P and supplied to a re-forming apparatus (not shown) for the multilayer capacitor electrode foil 21a as the next step. Then, a plurality of multilayer capacitor electrode foils 21a are laminated with a silver paste interposed between the multilayer capacitor electrode foils 21a, molded with electrodes, and then cut one by one to produce a multilayer capacitor.
[0027]
【The invention's effect】
In the present invention, a strip-shaped aluminum foil is fixed to a rectangular plate-shaped frame along the longitudinal direction as described above, and the aluminum foil is comb-shaped in which a plurality of multilayer capacitor electrode foils are continuous at one end in the short direction of the aluminum foil. Since the multilayer capacitor electrode foil is manufactured by punching into a shape, all the multilayer capacitor electrode foils can be easily formed with the same shape and the same pitch.
[0028]
In addition, the strip-shaped aluminum foil is manufactured by cutting the strip-shaped aluminum foil wound in a reel shape into a predetermined length, so that an extremely thin aluminum foil can be supplied without being deformed, There is an effect that a multilayer capacitor electrode foil can be manufactured continuously and efficiently, and as a result, an effect that a multilayer capacitor having stable electrical performance can be manufactured.
[0029]
Further, since the strip-shaped aluminum foil cut to a predetermined length is fixed by welding one end of the aluminum foil in the short direction to the rectangular plate-shaped frame, the rectangular plate-shaped frame and the strip-shaped aluminum foil are fixed. The foil can be welded at multiple locations to ensure electrical continuity. As a result, when aluminum foil is subjected to chemical conversion treatment, electricity can be applied to all multilayer capacitor electrode foils for chemical conversion treatment. There is an effect that it is possible to manufacture a multilayer capacitor having no electrical defects and excellent electrical characteristics.
[0030]
In addition, the aluminum foil obtained by cutting a strip-shaped aluminum foil wound in a reel shape into a predetermined length by a cutting device is transported to a rectangular plate-shaped frame supplied one by one by a frame supply device, and the belt-shaped aluminum foil is cut by a welding device. After welding one end of the aluminum foil in the short direction, a plurality of multilayer capacitor electrode foils are formed in a comb shape in which one end in the short direction of the aluminum foil is formed on the aluminum foil portion protruding from the rectangular plate frame by a press device. Since the multilayer capacitor electrode foil is manufactured by punching, the same shape of multilayer capacitor electrode foil can be surely arranged at the same pitch by one press process. The multilayer capacitor electrode foil can be completely stacked and stacked, greatly reducing the multilayer capacitor with poor electrical characteristics Eliminating obtained, since it is possible to fabricate a multilayer capacitor having excellent low cost electrical characteristics continuously, the effect capable of improving the yield obtained.
[Brief description of the drawings]
FIG. 1 to FIG. 9 relate to an embodiment of the present invention, and FIG. 1 is a schematic perspective view showing a manufacturing process of a multilayer capacitor electrode foil.
FIG. 2 is a perspective view showing a state in which a rectangular plate frame is supplied by a frame supply device.
FIG. 3 is a perspective view showing a state in which a belt-shaped aluminum foil cut to a predetermined length by a transport device is transported.
FIG. 4A is a plan view showing a state in which one end of a strip-shaped aluminum foil is placed on one end of a rectangular plate-shaped frame.
(B) is a top view which shows the state which welds a rectangular plate frame and strip | belt-shaped aluminum foil.
FIG. 5 is a front view of a main part of a welding apparatus showing a state in which a rectangular plate frame and a belt-like aluminum foil are welded.
FIG. 6 is an enlarged front view of a main part showing a use state of the welding apparatus.
FIG. 7 is a plan view showing a state in which a rectangular plate frame and a strip-shaped aluminum foil are welded by a welding apparatus and conveyed to the next process.
FIG. 8 is a front view of the press device.
FIG. 9 is a plan view of a stamped aluminum foil.
FIG. 10 is a perspective view showing a state in which a plurality of rectangular aluminum foils are welded one by one to a rectangular plate frame at a predetermined pitch according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Manufacturing apparatus of multilayer capacitor electrode foil 11 Frame supply apparatus 12 Cutting apparatus 13 Conveying apparatus 14 Welding apparatus 15 Press apparatus 16 Rectangular plate frame 21 Strip-shaped aluminum foil 21a Multilayer capacitor electrode foil

Claims (6)

A strip-shaped aluminum foil is protruded from the short plate-like frame in a rectangular plate frame along the longitudinal direction , and one end of the aluminum foil is welded and fixed to the short plate-like frame at a plurality of locations. Then, the method for producing a multilayer capacitor electrode foil is characterized in that the aluminum foil is manufactured by punching a plurality of multilayer capacitor electrode foils into a continuous comb shape at one end in the short direction of the aluminum foil. A strip-shaped aluminum foil wound in a reel shape is cut into a predetermined length, and the aluminum foil is projected from the short plate frame into a rectangular plate frame along the longitudinal direction. One end side is welded and fixed to the short plate-like frame at a plurality of locations, and then the aluminum foil is punched into a comb shape in which a plurality of multilayer capacitor electrode foils are continuous at one end in the short direction of the aluminum foil. A method for producing a multilayer capacitor electrode foil, characterized by comprising: A frame supply device for supplying rectangular plate frames one by one, and one end side of a strip-shaped aluminum foil in a short direction is welded and fixed to the rectangular plate frame at a plurality of locations, and the other end side is the short plate And a pressing device for punching the strip-shaped aluminum foil into a comb-like shape in which a plurality of multilayer capacitor electrode foils are continuous at one end in the short direction of the aluminum foil. Manufacturing equipment for multilayer capacitor electrode foil. A frame supply device that supplies rectangular plate frames one by one, a cutting device that cuts a strip-shaped aluminum foil wound in a reel shape into a predetermined length, and the cut strip-shaped aluminum foil are conveyed. A conveying device that conveys the rectangular plate-shaped frame, and one end side of the strip-shaped aluminum foil is welded and fixed to the rectangular plate-shaped frame at a plurality of locations, and the other end side is fixed to the rectangular plate-shaped frame. And a pressing device in which a plurality of multilayer capacitor electrode foils are punched into a continuous comb shape at one end in the short direction of the aluminum foil at a portion protruding from the rectangular plate frame of the strip-shaped aluminum foil And a multilayer capacitor electrode foil manufacturing apparatus.   A multilayer capacitor electrode foil obtained by the method for producing a multilayer capacitor electrode foil according to claim 1.   A multilayer capacitor obtained by laminating the multilayer capacitor electrode foil according to claim 5.

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