KR920004476B1 - Method of producing an electrolytic capacitor - Google Patents

Abstract

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Description

Manufacturing method of electrolytic capacitor

1 is a cross-sectional view showing the internal structure of an electrolytic capacitor.

2 is a perspective view showing a continuous rod body used in the present invention.

3 is a sectional view seen from (X)-(X ') of the continuous rod body of FIG.

4A to 4E are process explanatory diagrams showing a method for attaching the continuous sealing body of the present invention to a capacitor element.

* Explanation of symbols for main parts of the drawings

4: capacitor element 7,8: external lead

9: external device case 10, 11, 23, 24: through hole

12,21: sealing body 20: continuous sealing body

22: strip-shaped gas 31: transfer guide

32: upper blade 33: lower blade

34: insertion hole 35: circular hole

36: Jig for sealing body maintenance paper

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing an electrolytic capacitor, in particular, so-called dry electrolysis in which an element of a capacitor is impregnated with a liquid electrolyte and stored in an external device case, and the opening of the external body case is sealed by an elastic sealing body. The present invention relates to a preferred method for automating the sealing process of a capacitor.

As shown in FIG. 1, the general structure of the dry electrolytic capacitor formed by sealing the opening of the external device case as the elastic sealing member is the same as that of the strip-shaped anode-side electrode 1 having the dielectric oxide film formed thereon. The negative electrode 2 of the shape is polymerized and rolled up through the separator paper 3 to form a cylindrical capacitor 4, and at the lower end of the capacitor 4, the positive electrode 1 is formed. The cylindrical ends 5, 6 of the electrode leads electrically connected to the cathode electrodes 2, respectively, are provided to protrude. The outer leads 7 and 8 having a smaller diameter than the electrode leads 5 and 6 are connected to the front ends of the protruding portions of the electrode leads 5 and 6, respectively.

After the capacitor element 4 is impregnated with the electrolytic solution, the lower end surface of the capacitor element 4 includes an elastic rod 12 made of disc-shaped rubber, elastic plastic, or the like, which holds the lead wire through-holes 10 and 11. The outer lead (7) (8) is inserted into the through hole (10) (11) described above, and the main body portion of the condenser element (4) is housed in a cylindrical external device case (9) having a bottom portion. In addition, by pressing the outer periphery of the outer device case 9 of the central portion of the elastic rod body 12 inwards to form a groove 13, the peripheral edge of the opening end of the outer device case (9) The outer lids 7 and 8 protrude outward from the through-holes 10 and 11 provided in the elastic rod body 12 to the outside, and the outer lead 7 and 8 are sealed. Electrical connection is made.

Electrolytic capacitors of such a shape have been produced in extremely large quantities in recent years, and most of them have been manufactured by automated machinery. By the way, the so-called encapsulation process in which the capacitor element is housed in an external device case in the manufacturing process of the electrolytic capacitor, and then the opening of the external device case is sealed as a sealing body has an electrolytic capacity in that the sealing property affects the life characteristics of the electrolytic capacitor. It is an important process in capacitor manufacturing.

Moreover, since it is the process of combining various component parts, it is also an important process for automation.

Conventionally, in this encapsulation step, components such as a condenser element, an elastic sealing body, and an external device case are united as a single unit, and then transferred from the parts supply device to the work place in order.

Most of the parts are transferred by vibrating parts. However, when the parts to be transferred are hard parts such as metal, the parts are smoothly transferred, but the parts are made of rubber, elastic plastic, etc. In the case of soft parts, the coefficient of friction is large, and because of the deformation, blockage occurs on the conveying path, and the feeding is not carried out smoothly. Therefore, the whole assembly machine is stopped or the electrolytic capacitor is manufactured. There was a dismissal to throw away.

In the case of supplying parts as a single unit in this way, when there is a distinction between the surface and the back, the parts must be identified and energized in the direction to be so, and the parts must be supplied. Again there was the hassle needed.

An object of the present invention is to provide a method for producing an electrolytic capacitor, which is capable of supplying a preferable supply for automation using a continuous sealing body by improving the drawbacks as in the prior art.

The present invention supplies a disk-shaped turn-shaped rod body as a band-shaped continuum in which the elastic rod body is continuously formed at regular intervals, and is synchronized with the transfer of the condenser element in the sealing step to transfer the band-shaped continuous body. In addition, in the band-shaped continuum, the elastic rod is spun in sequence, and the spun elastic rod body, the condenser element, and the external device case are integrally assembled. .

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail according to an Example.

2 is a perspective view showing a continuous rod for an electrolytic capacitor used in the present invention, wherein disc shaped rods 21a, 21b, 21c and 21d are made of elastic members such as natural rubber, various synthetic rubbers, and elastic plastics. ) Are continuously arranged at regular intervals on the upper surface of the strip-shaped base 22.

Each sealing member 21 has through holes 23a, 23b, 23c, 23d, 24a, 24b, 24c, and 24d, respectively, for inserting external leads from the capacitor element. It is installed in pairs.

3 is a cross-sectional view taken from the line (X)-(X ') of FIG. 2, wherein the sealing body 21 is integrally provided on the upper surface of the band-shaped base 22, and the sealing body 21 is a condenser element. Through holes 23 and 24 are formed at positions engaged with the protruding portions of the outer lead drawn out in the drawing.

This sealing member is formed by inserting a band-shaped raw material into a mold and vulcanizing it, for example, when the element is a rubber of various kinds.

In the case of the elastic plastic, it is formed by a method of press-injecting the molten raw material into a mold, and both are formed as an integrated continuous body.

In addition, the continuous sealing body formed in this way has the length of the strip | belt-shaped base 22, when only several or several dozen sealing bodies 21 can be manufactured by the size of the metal mold | die, the size of the sealing body 21, etc. When the end portions in the longitudinal direction are joined to each other in succession, and the spacing between adjacent sealing bodies 21 of the joining portion is set equal to the arrangement interval of the sealing bodies 21 of other portions, an extremely long continuous body can be formed. If the continuum is wound around the rails and supplied to the automatic manufacturing equipment in turn, continuous use is possible for a long time.

Next, the sealing method of the electrolytic capacitor of this invention using the said continuous sealing body is demonstrated according to an Example.

4 is an explanatory diagram showing a step of separating a separate elastic rod body from the continuous rod body of the present invention and attaching it to the capacitor element. First, as shown in the same drawing (A), the strip-shaped base body 22 arranged in the direction in which the sealing body 21 projects downward is as much as the distance of the arrangement interval of the sealing body 21 in the direction of the arrow in the figure. It is supported by the conveyance guide 31 and is conveyed intermittently. And the rudder device of the sealing body 21 is provided on the conveyance path of this continuous sealing body 20. As shown in FIG.

The piercing device is composed of a cylindrical upper blade 32 having a diameter approximately equal to that of the sealing body 21 and a lower blade 33 having a fixedly arranged circular hole. The circular hole 35 constituting the blade 32 and the lower blade 33 is disposed on the same axis, so that the upper edge 32 and the lower edge of the upper blade 32 are lowered by the lower blade 32 being lowered. Cutting is performed as the circular hole 35 of 33.

Then, as shown in the same figure (B), the band-shaped gas 22 moves together with the transfer guide 31 to first transfer the ballast body 21 to the same axis position as the rudder device, and then the transfer guide is continued. By moving downward, the sealing body 21 is inserted into the circular hole 35 of the lower blade 33. Subsequently, the upper blade 32 descends to separate the sealing body 21 from the strip-shaped base 22 of the continuous sealing body 20.

At this time, the feed guide 31 is provided with an insertion hole 34 larger than the diameter of the upper blade 32, the upper blade 32 is lowered through the insertion hole 34 is cut.

Next, as in the same drawing (C), the upper blade 32 then continues to descend and presses the separated sealing body 21 downwardly into the circular hole 35 of the lower blade 33 again. .

At this time, at the open end of the lower end of the cylindrical hole 35 of the lower blade 33, the sealing body conserving jig 36 moves and waits at the same pitch as that of the continuous sealing body.

This sealing member battery jig 36 is provided with a cylindrical recess portion 37 for holding the sealing member 21 on the upper portion thereof, and further includes the recess portion described above at the end portion 38. Holes 39 smaller in diameter than 37 are provided downward.

Then, the sealing body 21 pushed downward by the upper blade 32 as described above is pushed into the recess 37 of the jig 36 for sealing body maintenance paper. Then, the upper blade 32, which has been pushed in, is raised to return to the position of the drawing A, and subsequent blasting of the continuous sealing body is performed in the same operation.

Moreover, the strip | belt-shaped base | substrate 22 in which the sealing body 21 single piece was sent is sent to the right direction of the same figure, and is used again as waste or raw material again. On the other hand, the jig 36 for the retainer body holding paper holding the ball-shaped sealing body 21 moves to the place where the capacitor element insertion is exercised.

The same drawing (D) shows the insertion process of the condenser element, in which the condenser element 4 supplied from the supply device of the other path is supported by the above-described sealing member battery jig 36 to move and wait. The main body portion of the condenser element 4 is sandwiched and conveyed by the clamping hole 40 of the condenser element with the outer leads 7 and 8 facing downward.

Then, the condenser element 4 transferred to the upper portion of the above-described sealing member conservatory jig 36 is continuously lowered, and the through-holes in which the front ends of the outer leads 7 and 8 are provided in the sealing body 21 ( 23) is inserted into 24, and the lower end surface of the main body portion of the condenser element 4 is pushed in until it contacts the sealing member 21. The same figure (E) has shown the state in which the capacitor | condenser element 4 was mounted in the sealing body 21. As shown in FIG.

Thereafter, the integrated condenser element 4 and the sealing member 21 are not shown, but are again sent to the next workshop, where the external device case is covered and closed by winding the open end of the external device case. The series of operations described now is repeated and the bag is performed continuously. In addition, in the present embodiment, the sealing body storage jig 36 for storing the sealing body 21 and the condenser element 4 in which the sealing body single body 21 is blown down by the continuous sealing body 20 is housed. And the condenser element 4 is attached to the next work place, for example, but the condenser element is fixed to the work place with the external lead upwards, and other integrated parts such as inserting the squeezing body thereon into the upper part are inserted. Of course, it does not interfere with the method.

As described above, since the sealing method of the present invention is supplied as a strip-shaped continuous body in which the sealing body is integrally formed, the sealing body may be clogged on the conveying path as in the case of supplying a conventional sealing body single body by vibration. Does not stop and it does not become an obstacle of automation.

In addition, since the sealing body is integrally installed in the strip-shaped body, the surface or the back surface of the sealing body or the through hole is always supplied to the sealing device at a predetermined position, so that even if the sealing body is a non-symmetrical shape on the surface or tinnitus, the surface or the back surface It can be attached to a capacitor element as it is without discriminating.

In addition, when inserting the outer lead into the through hole of the sealing body, there is no need to align the front end of the outer lead with the through hole, which eliminates the need for an alignment device, thereby simplifying the manufacturing apparatus and reducing the number of processes. The productivity is improved.

As described above, the electrolytic capacitor using the continuous sealing body of the present invention can reduce the discontinuity in the process in this manufacturing process and can simplify the process to improve the production effect.

In addition, since the manufacturing is performed very smoothly, the occurrence of defective products can be reduced, and the characteristics of the products can be stabilized to obtain a highly reliable electrolytic capacitor.

Claims (1)

The disk-shaped elastic sealing member 21 is supplied to the sealing step of the electrolytic capacitor as a band-shaped continuous body in which the elastic sealing bodies are continuously formed at regular intervals, and is separately supplied to the sealing step described above. In synchronism with the transfer, the belt-shaped continuum is transferred, and the elastic rod body is sequentially struck from the belt-shaped continuum, and the external elastic case and the external device case supplied separately from the condenser element ( 9) a method for producing an electrolytic capacitor, characterized in that the assembly is integrated.

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