JPH0326533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a capacitor formed with coaxially wound multi-element elements.

Generally, when forming a multi-element capacitor by stacking and coaxially winding two metallized films having vapor-deposited electrodes, a separator is placed between the electrodes by scattering part of the vapor-deposited electrodes or by cutting the metallized film. It is interposed and insulated and wound.

Conventionally, as shown in FIG. 1 or 2, a capacitor as described above is manufactured by scattering part of the vapor-deposited electrodes 1a, 2a of the metallized films 1, 2, so that the vapor-deposited electrodes 1a are separated from the core side and the outer peripheral side. An insulating separator 3 such as paper or plastic film, which is wider than the metallized films 1 and 2, is interposed between the divided electrodes G, and the capacitor element 4 is formed by coaxially winding it with the other metallized film 2. Then, a metallicon metal 5 was attached to the end face, so that it was constructed as shown in FIG. 3. 1b and 2b are plastic films. Therefore, the metallicon metal 5 adheres to the ends of the insulating separator 3, so the metallicon metal 5 adhering to the insulating separator 3 may be scraped off.
The metallcon metal 5 was mechanically removed by cutting the protruding part 3a of the insulating separator 3 by one or two turns to insulate the capacitor elements on the core side and the outer circumferential side, but this method requires a lot of man-hours and requires automation. It was difficult to do so, and there were problems such as sparks occurring if metal powder remained in the removed portion of the metallcon metal 5.

In order to solve the above-mentioned problem, the present invention, after spraying metallicon metal, presses the core side end of the capacitor element to move the core side element in the axial direction.
After extremely widening the insulation distance between the metallized metal on the core side and the outer circumferential side, the moved core side element is pressed in the opposite direction and returned to its original position, thereby increasing the distance between the core side and the outer circumferential side. This capacitor is characterized by maintaining a predetermined insulation distance between elements.

The present invention will be explained below with reference to the embodiments shown in FIGS. 4 and 5.

FIG. 4 is an explanatory diagram of the process of manufacturing a capacitor element. After the metallcon metal 5 is uniformly attached to both end surfaces of the capacitor element 4 wound as shown in FIG. capacitor element 4
is placed on a jig 6 that has a hole or recess in the center that is larger than the outer diameter of the core element, and then a columnar shape smaller than the outer diameter of the core element is placed on the jig 6, which has a hole or recess in the center that is larger than the outer diameter of the core element. When the core side element is moved extremely in the axial direction by pressing the jig 7, slippage occurs on the surface of the interposed insulating separator 3, and the metallcon metal 5 on the core side and the outer peripheral side are separated. . Next, as shown in FIG.
When the central portion is pressed and returned to its original state, the wound portion of the separator 3 changes from A to B in FIG. 5, and one end surface is formed into an inverted V shape and the other end surface is formed into a V shape.

Therefore, the upper side can maintain the insulation distance H, and the lower side has the width W, and the insulation can also be maintained at this distance. In this case, it is necessary to significantly increase the rotation speed of the separator 3, so by fitting the insulating ring 9 as shown in Figure 5 C, the insulation distance between the winding core side and the outer peripheral side elements can be further increased on the lower side as well. Can be held stably.

Further, as shown in FIG. 5B, when the metallcon metal 5 on the core side and the outer peripheral side are short-circuited using a conductive wire 10 and one end surface is used as a common electrode, it is not necessary to fit the insulating ring 9.

Since the capacitor of the present invention is constructed as described above, in the step of attaching the metallicon metal 5 to the end face of the capacitor element 4, the metallicon metal 5 attached to the end face of the insulating separator 3
can be removed very easily and completely by pressing the element on the core side in the axial direction and returning it to its original position.
Insulation failures, sparks, etc. do not occur, and the height of the capacitor element 4 does not increase, making it possible to obtain a highly safe capacitor.

In the above embodiment, a two-element capacitor is described in which the capacitor is wound with a separator 3 interposed between the core side and the outer circumferential side, but a capacitor having three or more coaxially wound elements can be constructed in the same manner.

As described above, the capacitor of the present invention is extremely advantageous in terms of productivity and safety, and has great industrial and practical value.

[Brief explanation of the drawing]

Figures 1 and 2 are disassembled plan views of the main parts of a capacitor element, Figure 3A is a sectional view of the main parts in the manufacturing process of the capacitor element, B is a perspective view of the capacitor element in Figure 3A, and Figure 4I. 5A to 5D are explanatory diagrams of a capacitor element in the manufacturing process according to an embodiment of the present invention, and FIGS. 1, 2: metallized film, 1a, 2a: vapor deposited electrode, 3: insulating separator, 4: capacitor element,
5: Metallicon metal.

Claims (1)

[Claims] 1 Part of the metallized film vapor-deposited electrode is scattered or the metalized film is cut to separate the vapor-deposited electrode into a winding core side and an outer peripheral side, and an insulating separator is interposed between the divided electrodes, and coaxial winding is performed. After forming a multi-element capacitor and attaching metallicon metal to the end face of the element, the core-side end of the element is pressed and the core-side element is moved in the axial direction, and the core side and outer peripheral side are moved. A capacitor characterized in that a predetermined insulation distance is maintained by increasing the insulation distance between the metallcon metals more than necessary and then returning the moved winding core side element to its original position.