JPS6041450B2 - Method and device for reconstitution of electrolytic capacitors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for reconstitution of electrolytic capacitors, and in particular, in combination with an electrolytic solution self-vacuum impregnating device, it is possible to energize electrolytic capacitor elements while keeping them aligned immediately after immersion in a vacuum chamber. To repair the electrode film by releasing the gas into the atmosphere and performing reconversion treatment, greatly shortening the time required for aging, and efficiently manufacturing high-quality electrolytic capacitors with extremely low leakage current. The present invention relates to a method and apparatus capable of performing the same.

Conventionally, electrolytic capacitors usually use aluminum foil for their positive and negative electrodes, which is first etched to increase its surface area, and then chemically treated to form a coating on the surface to prevent leakage current. However, when the electrode is cut to a certain width, the bare aluminum is exposed on both sides of the strip-shaped electrode, and since crimping is required to attach the lead wire, chemical formation may occur at the terminal portion of the lead wire. The coating can be destroyed and even scratched during winding and molding through insulating paper, so in order to repair this coating, electricity is applied after the electrolytic capacitor is completed to perform what is known as aging. .

However, if the electrolytic capacitor is only aged after completion, it is already sealed with an aluminum case and anti-termite rubber, so the gas generated by energization will fill and remain inside the electrolytic capacitor, increasing the internal pressure. However, the film could not be repaired sufficiently, resulting in a large leakage current and a drawback that a high-quality electrolytic capacitor could not be obtained.

For this reason, electrolytic capacitors cannot be used in equipment that requires high-quality capacitors, such as audio equipment, and conventionally expensive tantalum capacitors have been used, leading to increased costs. In addition, conventional aging usually required 30 minutes to 2 hours, and the production efficiency was extremely low.
The present invention has been made to eliminate the drawbacks of the prior art described above, and its purpose is to provide a high-quality electrolytic capacitor with low leakage current.
The object of the present invention is to obtain an electrolytic capacitor that can be used for audio equipment, etc., which conventionally could only be supported by tantalum capacitors.

Another objective is to significantly shorten the time required for aging of electrolytic capacitors after completion, making it possible to produce high-quality electrolytic capacitors with extremely high efficiency, which would have been impossible with conventional technology, and reducing production costs. It is to aim for. Another objective is to combine the reconversion treatment for coating repair with an automatic vacuum immersion process, which is performed immediately after impregnation and releases a large amount of gas generated at the initial stage of energization into the atmosphere.
The objective is to reduce the internal pressure when the electrolytic capacitor is completed. In short, the method of the present invention determines the positive and negative states of the IJ lead wires of the electrolytic capacitor element which are wound up with lead wires attached, aligns the directions of the positive and negative electrodes, and connects the insulator with the positive and negative energizing terminal pieces. The electrolytic capacitor elements are aligned and clamped in a clamp jig, vacuum impregnated with an electrolyte, and then positive and negative voltages are applied to the energizing terminal pieces of the clamp to energize each electrolytic capacitor element, followed by chemical conversion treatment. The apparatus of the present invention includes a chuck device that grips and moves an electrolytic capacitor element that has been wound up with a lead wire attached thereto, and a chuck device that grips and moves the electrolytic capacitor element that is gripped by the chuck device. A device for determining the polarity of the lead wires, a device for aligning the polarity of the lead wires, a terminal piece for positive current on one side of the main body made of an insulator, and a terminal piece for negative current on the opposite side, a clamping jig in which the lead wires of the electrolytic capacitor elements, which are aligned, are inserted into the terminal pieces and aligned and clamped; and a vacuum impregnation in which vacuum impregnation is performed with an electrolyte while the electrolytic capacitor elements are aligned and clamped in the clamping jig. and an energizing device configured to apply positive and negative voltages to the positive and negative normal terminal pieces of the clamp paint after vacuum impregnation, respectively, and to energize the electrolytic capacitor element that has been vacuum impregnated with electrolyte to conduct chemical formation. It is characterized by being configured to perform processing.

The present invention will be explained below based on embodiments shown in the drawings.

What is shown in Fig. 1 is a transport device 2 for electrolytic capacitor elements 1 with lead wires la attached and wound up, a straight feeder 3, and a capacitor element 1 at the top, which is normally closed, on standby. The shirt I tried to wear 4
and a loading clamper 5 which opens and closes in the horizontal plane direction to grip or release the capacitor element 1 and reciprocates between the position of the virtual line and the position of the solid line, and the capacitor element 1 is delivered from the transverse clamper 5, It consists of a vertical feed clamper 6 that grips the wired portion lb of the lead wire la and moves upward to deliver the capacitor element 1 to the next process. What is shown in FIG. 2 is a chuck device 7 that grips and moves the capacitor element 1, a lead wire straightening device 8 that straightens the bend in the lead wire la of the capacitor element 1, and a capacitor gripped by the chuck device 7. A device 9 for determining the polarity of the lead wire la of the element 1, and a device 10 for reversing the chuck 7a to align the polarity of the lead wire la when the polarity of the lead wire la is opposite.
It consists of

The lead wire la straightening device 8 has two V-shaped grooves 8b formed on both sides of an edge 8a in the center, and the V-shaped grooves 8b.
, 8b to straighten the bend by squeezing the lead wire la upward from the wired portion lb. Further, the sacrifice discriminating device 9 has a built-in light source and photoelectric elements on both sides of the groove 9a through which the lead wire la passes, and is configured to detect the long and short passage order of the lead wire la to discriminate the polarity. A device for aligning the magnetic properties of the lead wires 1A and 1B is designed so that when the polarity is opposite to the normal one, it is reversed by a chuck 7a to align the polarity.Furthermore, in the case of a defective element, it is removed from the bottom to the top using a protrusion 10a. The capacitor element 1 is configured to protrude from the top. The one shown in FIG. 3 includes a positive current-carrying terminal piece 12 on one side 11a of a main body 11 made of an insulator, and a negative current-carrying terminal piece 13 on the opposite side 11b as shown in FIG. The lead wire la of the capacitor element 1 whose polarity is aligned is connected to the current-carrying terminal pieces 12, 13 and the main body 1.
A clamp jig 14 is inserted between the two and aligned and clamped.

The main body 11 is made of a material with excellent insulation and wear resistance, such as Bakelite or polyacetal resin. In addition, the current-carrying terminal pieces 12 and 13 contain a small amount of oxide, a metal conductor,
For example, a stainless steel plate is used. Also 11c, 11
d is a notch for electricity supply, 11e is a suspension groove during vacuum impregnation, and 11f is a pivot hole for conveyance. Further, the lower part of the main body 11 is formed into a sharp V-shape, and its tip 11g fits between the two lead wires la to separate them. What is shown in FIG. 6 is a vacuum chamber immersion device 16 that performs summer air impregnation with an electrolytic solution 15 while aligning and holding capacitor elements 1 in a clamp jig 14, and includes a vacuum impregnation tank 17,
It consists of a lid 18 for the impregnation tank, and is further equipped with a control device for controlling the level of the electrolyte 15, a pump for pouring the electrolyte, a vacuum pump, and the like.

What is shown in Fig. 7 is the clamp jig 1 after the completion of vacuum impregnation.
The energizing devices 19 and 20 are configured to apply positive and negative voltages to the positive and negative energizing terminal pieces 12 and 13 of No. 4, respectively, and the energizing device 19 is supported by a support 19a and a pin 19b on the support. , a movable member 19e that is always biased by a spring 19c so that the contact plate 19d closes, and the contact plate 19
d is connected to the terminal plate 19f, and is configured so that a positive voltage is applied from the outside to the terminal plate 19f.
c, a contact plate 20d, a movable member 20e, and a terminal plate 20f, and is attached in the opposite direction to the energizing device 19.
The present invention is configured as described above, and its operation will be explained below.

First, the capacitor element 1 is conveyed by the straight feeder 3, is put on standby by the shirt feeder 4, and the horizontal feed clamper 5 returns to grip the leading capacitor element 1 from the side until it reaches the solid line position. Moving. At this time, the shirt plate 4 is pushed open with a strong force, and the next capacitor element 1 advances to the shirt plate 4. When the stacking clamper 5 stops at the solid line position, the vertical feed clamper 6, which had been closed until then, closes and holds the sticky part lb of the lead wire la under pressure, and the lateral feed clamper 5 retreats and moves to the position indicated by the imaginary line. Return directly.
As a result, the vertical feed clamper 6 ascends as shown by the arrow, transfers the capacitor element 1 to the chuck 7a in FIG. 2, and descends. As the chuck 7a that has received the capacitor element 1 moves in the direction of the arrow, its vertical direction is reversed, and the lead wire la is directed upward, as shown by another arrow. Then, moving in the direction of the arrow, the lead wire straightening device 8 straightens the lead wire la to straighten the bend, and while it passes through the groove 9a of the polarity determining device 9, the polarity is determined. If the chuck 7a is gripped by the chuck 7a with the long and short, that is, polarity, reversed, the chuck 7a is reversed by the device 10 for aligning the polarity of the lead wires la, becomes the correct orientation, and then moves in the direction of the arrow to grip the chuck 7a.
As shown in FIG. The tool 14 is sequentially fed each time one capacitor element 1 is inserted, and a predetermined number of capacitor elements 1 are aligned and held. This number is suitably between 20 and 3, but may be arbitrary.
As a result, all the lead wires of capacitor elements 1
a is the positive current-carrying terminal piece 12 or the negative current-carrying terminal piece 13
electrically connected to. This state is shown in FIG. Next, as shown in FIG.
7, the lid 18 is put on and sealed, the vacuum pump is activated, the inside of the vacuum chamber immersion device 16 and each capacitor element 1 is in a vacuum state, and the electrolyte 15 is injected.
The cosodensor element 1 is impregnated with about 20 to 30% of sand.

When the impregnation is completed, the lid 18 is opened to release to atmospheric pressure, and the electrolyte 15 is pumped out. The clamp jig 14 is then returned to the position shown in FIG. 5, and is transported laterally as shown by the arrow, and the energizing devices 19 and 20 open the movable members 19e and 20e from above and descend. The contact plate 19d of No. 19 is connected to the energizing terminal piece 12, the contact plate 20d of the energizing device 20 is connected to the energizing terminal piece 13, a positive voltage is applied to the terminal plate 19f, and a negative voltage is applied to the terminal plate 20f. Each capacitor element 1 is energized for 20 to 3 hours. Voltage is 20% of normal voltage
It is a slight increase. As a result, the temperature inside the capacitor element 1 rises, and the impregnated electrolyte 15 acts effectively.
A new coating is formed on the electrode, and the parts where the bare aluminum was exposed on both sides of the strip electrode, the crimped parts for attaching the lead wire la, and other damaged parts of the coating are covered with a new coating, and the coating is shortened. It will be completely repaired in time. At this time, a large amount of gas is generated, but unlike in the case of aging after completion, all of this is released into the atmosphere, which is extremely rational as it does not increase the internal pressure of the electrolytic capacitor. As a result of experiments, it was found that a high quality electrolytic capacitor with extremely low leakage current can be obtained using the above method and apparatus.

Since the present invention is constructed and operates as described above, it can provide a high-quality electrolytic capacitor with extremely low leakage current, and can also be used in audio equipment, etc., which conventionally could only be supported by tantalum capacitors. The effect is that a possible electrolytic capacitor can be obtained. In addition, the time required for aging after completion of electrolytic capacitors can be significantly shortened, making it possible to produce high-quality electrolytic capacitors with extremely high efficiency, which was impossible to imagine with conventional technology, and reducing production costs. You can get the desired effect. Furthermore, by combining the reconversion treatment to repair the film with the automatic vacuum immersion process and performing it immediately after the impregnation treatment, a large amount of gas generated at the initial stage of energization is released into the atmosphere, and the electrolytic capacitor This is a truly great invention that contributes to industry, as it has achieved ground-breaking effects such as being able to reduce the internal pressure upon completion compared to its predecessors.

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention, and FIG. 1 is a perspective view of a conveying device for an electrolytic capacitor element, FIG. Figure 3 is a perspective view showing a state in which the capacitor elements are aligned and held by a clamp, Figure 4 is a partial perspective view taken in the direction of the N arrow in Figure 3, and Figure 5 is a state in which the capacitor elements are aligned and held. FIG. 6 is a perspective view of the clamp jig, FIG. 6 is a perspective view showing a state in which vacuum impregnation is being performed, and FIG. 7 is a perspective view showing a state in which reconversion treatment is being performed by energizing. 1 is an electrolytic capacitor element, la is a lead wire, 7 is a chuck device, 8 is a lead wire correction device, 9 is a lead wire polarity determining device, 1 is a device for aligning the polarity of the lead wires, 11 is a clamp odor pickup device. The main body, 12 is a positive energizing terminal piece, 13 is a negative energizing terminal piece, 14 is a clamp jig, 15 is an electrolyte, 16 is a vacuum impregnating device, and 19 and 2 are energizing devices. Figure 1 Figure 2 Figure 4 Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. An insulator that determines the positive and negative states of the lead wires of the electrolytic capacitor element to which the lead wires are attached and is wound to align the positive and negative electrodes, and is provided with positive and negative current-carrying terminal pieces. The electrolytic capacitor elements are aligned and clamped in a clamp jig to be vacuum impregnated with an electrolyte solution, and then positive and negative voltages are applied to the energizing terminal pieces of the clamp jig to energize each electrolytic capacitor element, followed by chemical conversion treatment. A method for reconstitution of an electrolytic capacitor, characterized by performing the following steps. 2. A chuck device that grips and moves an electrolytic capacitor element with a lead wire attached and wound up, a polarity determining device for the lead wire of the electrolytic capacitor element gripped by the chuck device, and a device that aligns the polarities of the lead wires. a device;
A main body made of an insulator is provided with a positive current-carrying terminal piece on one side and a negative current-carrying terminal piece on the opposite side, and the lead wires of the electrolytic capacitor element whose polarities are aligned are inserted into the terminal pieces and aligned. A clamp jig to be clamped, a vacuum impregnation device that performs vacuum impregnation with an electrolyte while aligning and clamping the electrolytic capacitor elements on the clamp jig, and a vacuum impregnation device that performs vacuum impregnation with an electrolyte while the electrolytic capacitor elements are aligned and clamped in the clamp jig, and after the vacuum impregnation is completed, the positive and negative current-carrying terminal pieces of the clamp jig are connected to each other. What is claimed is: 1. An electrolytic capacitor reconversion device, comprising: an energizing device configured to apply positive and negative voltages, and configured to conduct a chemical conversion treatment by energizing an electrolytic capacitor element that has been vacuum impregnated with an electrolytic solution.