JPS6364046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concentrically wound composite capacitor constructed from identical metallized films.

As shown in Fig. 1, a conventional concentrically wound composite capacitor has an inner winding body 2 arranged by winding a metalized film to a specified length on a winding core 1, and then an insulating sheet, film, etc. After inserting the insulating member 3 made of A concentrically wound composite element body is constructed in which electrical connection with the body 4 is cut off by an insulating member 3, and then electrode metal is applied to both end surfaces of the inner wound body 2 and the outer wound body 4. After simultaneously forming metallicon layers 5 and 6,
As shown in FIG. 2, by applying a force to the inner-wound body 2 in the direction of the arrow and pushing it out, the inner-wound body 2 and the outer-wound body 4 form a capacitor element that is staggered with respect to each other in a stepwise manner. The finished product was created by pulling out the lead and storing it in a container to create a sealed structure. FIG. 3 shows an equivalent circuit of the capacitor element shown in FIG. 2.

However, according to this conventional configuration, as shown in FIGS. 4a and 4b, at the insertion point of the insulating member 3,
In order to break the electrical connection between the metallized film of the inner winding body 2 and the metallized film of the outer winding body 4, the winding of the metallized film is interrupted and cut, and automated equipment was considered. In this case, a large number of processing mechanisms are required as a metallized film processing device (metalized film cutting device, feeding device, etc.), which not only complicates the equipment and incurs a large amount of equipment cost, but also requires a large number of processing mechanisms that are not equipped with the processing mechanisms described above. Even with automated equipment, the metallized film cannot be fed smoothly at the insertion point of the insulating member 5 due to problems such as static electricity in the film and weak film stiffness, resulting in problems such as shorts and end faces due to poor processing at the start of winding. This method has the drawbacks of a high rate of defective products, such as non-aligned defects, and poor productivity. Note that FIG. 4a shows a case where a metallized film 7 with metal vapor-deposited electrodes formed on both sides is used, and FIG. 4b shows a case where a metallized film 7 with metal vapor-deposited electrodes formed on one side is used. , 8 in FIGS. 4a and 4b is a non-metalized film. Moreover, the shaded area indicates a metal vapor deposited electrode.

The present invention is intended to solve these conventional drawbacks, and aims to enable manufacturing with simple manufacturing equipment and high productivity.

In order to achieve this purpose, in the present invention,
The metallized film used is one in which the metal vapor-deposited electrode is removed from the portion corresponding to the insertion point of the insulating member. Hereinafter, a concentrically wound composite capacitor according to the present invention will be explained using the drawings of FIGS. 5 to 8.

Figures 5a and 5b show the state of the manufacturing process of the main parts of the concentrically wound composite capacitor according to the present invention.
Figure a shows the fifth layer when double-sided metallized film 7 is used.
Figure b shows the case where a single-sided metallized film 7 is used, and the shaded area is the metal vapor-deposited electrode.

That is, in the present invention, as shown in FIGS. 5a and 5b, the metal vapor-deposited electrode of the metallized film 7 is removed without cutting the metallized film 7 at the portion corresponding to the insertion point of the insulating member 3. The non-metalized portion 9 is formed by electrically scattering and removed, and this metalized film 7 is wound to provide electrical insulation between the inner wound body 2 and the outer wound body 4 as shown in FIG. This is to obtain a capacitor element in a maintained state.

According to the present invention, the metallized film 7 is not cut at the insertion point of the insulating member 3, and the metallized film 7 is simply attached to the automatic winder with a device that electrically scatters and removes the metal-deposited electrode. It is possible to provide a highly productive concentrically wound composite capacitor that can be wound with the chemical film 7 and does not require any complicated equipment.

Here, in the present invention, an example of a method for removing a metal vapor deposited electrode will be described with reference to FIGS. 6 and 7.

First, let us explain what is shown in Figure 6.
In FIG. 6, 10 is a roller-shaped electrode that has a large contact area with the metal vapor deposited electrode, 11 is a roller shaped electrode that has a small contact area with the metal vapor deposited electrode, and 12 is a roller.

What is shown in FIG. 6 is an electrode 10 and an electrode 11.
When a DC voltage of 30 to 50 V is applied between the electrodes 10
Since the electrode 11 and the metallized film 7 are in contact with each other over a wide area, there is no concentration of current, and the metal vapor-deposited electrode is not scattered here. However, since the electrode 11 and the metallized film 7 are in contact with each other over a narrow area, The current density increases and the metal vapor deposited electrode is scattered and removed.

Moreover, what is shown in FIG. 7 is a metallized film 7.
The electrodes 13 with a small contact area are arranged as shown in the figure, and the metal vapor deposited film electrode can be scattered and removed in the same way as the one shown in FIG.

FIG. 8 shows the metallized film 7 from which the metal vapor-deposited electrodes have been scattered and removed in this manner. In addition,
In FIG. 8, 7a is a metal vapor deposited electrode.

As described above, according to the concentrically wound composite capacitor of the present invention, the metallized film can be wound as is without cutting, and a complicated film processing device is not required, and the concentric capacitor is inexpensive and highly productive. It can be made into a core-wound composite capacitor.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional concentrically wound composite capacitor after a metallized film is wound and a metallicon layer is formed. Figure 2 is a cross-sectional view of the capacitor element of the same capacitor. Second
The equivalent circuit diagram of the capacitor element shown in FIG. Figures 5a and 5b are schematic diagrams showing the manufacturing process of the main parts of the concentrically wound composite capacitor according to the present invention, when a double-sided metalized film is used and when a single-sided metalized film is used, respectively. and FIG. 7 are schematic diagrams showing the method for manufacturing the metallized film used in the concentrically wound composite capacitor of the present invention, respectively, and FIG. 8 is the metallized film obtained by the method shown in FIGS. 6 and 7. FIG. 2...Inner winding body, 3...Insulating member, 4...Outer winding body, 7...Metalized film, 7a...Metal vapor deposited electrode, 9...Non-metalized portion.

Claims (1)

[Claims] 1. It is constructed by arranging a plurality of wound bodies formed by winding a metallized film having metal vapor-deposited electrodes on one or both sides with an insulating member interposed therebetween, and as the metallized film, the insulating member is A concentrically wound composite capacitor characterized by using a metallized film from which metal vapor-deposited electrodes have been removed at the portion corresponding to the insertion point.