JPS62124720A - Manufacture of capacitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing metallized film capacitors used in electronic and electrical equipment.

BACKGROUND OF THE INVENTION Conventional methods for producing metallized film capacitors can be roughly divided into two types: two-wound film capacitors and one-wound film capacitors.

There are four types of double-wound film capacitors:

(1) As shown in FIG. 6, a vapor-deposited electrode 2 is formed on one side of the dielectric film 1 by a vapor deposition method or a sputtering method (hereinafter referred to as vapor deposition), and a single-sided metallized film 3 is formed on one side of the dielectric film 1. Method for manufacturing a single-sided metallized film capacitor by stacking and winding the capacitors (2) As shown in FIG. Manufacturing method of double-sided metallized film capacitor by overlapping and winding two single-sided metallized films 3) As shown in Fig. ,
Method for manufacturing a single-sided metalized film multilayer capacitor to obtain a unit capacitor (4) As shown in FIG. 9, the double-sided metalized film 4
A method for producing a double-sided metallized film multilayer capacitor in which a unit capacitor is obtained by overlapping two sheets of non-metalized film 5, winding it around a large bobbin, and then cutting it. There is a street.

(1) As shown in FIG. 10, a lacquered film made by winding only one lacquer-coated double-sided metalized film on which a dielectric 6 is formed by lacquer coating or the like on a double-sided metalized film 4. Method for manufacturing a capacitor I2) A method for manufacturing a lacquered film multilayer capacitor in which a single unit capacitor is obtained by winding only one sheet of the lacquer-coated double-sided metallized film around a large bobbin as shown in FIG. Problems to be Solved However, in the method for manufacturing a double-wound film capacitor as described above, two thin films (1.5 μm
~) are overlapped and wound, it is difficult to adjust the misalignment of the two thin films and the tension between the two thin films, requiring skill and making it difficult to increase the speed.

In addition, in single-wound film capacitors using lacquer-coated double-sided metallized films, productivity during winding is superior to double-wound film capacitors, but
Since a lacquer coating process is required, overall productivity has not been improved.

In view of these conventional drawbacks, the present invention provides a method for manufacturing capacitors with high productivity and high precision by winding and cutting only one single-sided metallized film without lacquer coating. This is what we provide.

Means for Solving the Problem In order to solve this problem, the method for manufacturing a capacitor of the present invention provides a method for manufacturing a capacitor such that the deposited margins of the contacting and overlapping single-sided metallized films are alternately arranged at opposite ends. This process includes the steps of forming a section, winding this single-sided metallized film around a bobbin to form a base capacitor, and cutting the base capacitor to obtain unit capacitors.

According to the capacitor manufacturing method of the present invention, the cross section of the base capacitor obtained by winding one film is such that the vapor deposition margins of the single-sided metallized films that touch and overlap are always opposite ends. The structure is similar to that of a double-wound, single-sided metalized film capacitor.

Furthermore, by cutting this base capacitor, the vapor-deposited electrodes, which had been connected in one film until now, become independent electrodes one by one, resulting in the structure of a single-sided metallized film multilayer capacitor.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 2 shows a schematic diagram of a method for manufacturing a capacitor according to the invention. In other words, one single-sided metallized film 12 fed from the supply bobbin 11 is exposed to the margin forming laser 13 at both ends in the width direction, alternately every one rotation of the take-up bobbin 14. The vapor deposited metal 121L at the end is scattered, forming a vapor deposition margin portion 12b. Next, a plurality of notches 120 having a depth narrower than the width of the evaporation margin are provided at the end of the evaporation margin 12b by the notch laser 15.

The film is shown in FIG. Then, the film provided with the margins and notches is wound onto the take-up bobbin 14 to obtain the base capacitor 16.

After forming an electrode lead-out portion 17 on the wound end face of the base capacitor 16 by metal spraying, it is cut as shown in FIG. 3 to obtain a unit capacitor 18. FIG. 4 is a diagram showing the laminated state of the films of this unit capacitor 18.

Next, the operation of the manufacturing method of this embodiment will be explained. By using a margin forming laser 13 to form a vapor-deposited margin portion 12b at the end of one single-sided metallized film 12 for each rotation of the winding bobbin 14, the base body is wound on the winding bobbin 14. The cross section of the capacitor 16 is always like the cross section shown in Figure 2, with the vapor deposition margins 12b of the overlapping single-sided metalized films 12 being at opposite ends, as if they were two sheets. The structure is a single-sided metalized film capacitor.

Furthermore, after metal spraying is applied to the end face of the base capacitor 16,
By cutting, the vapor-deposited electrodes 121L, which were connected as a single film, become independent electrodes one by one, forming a single-sided metalized film multilayer capacitor structure.

Note that the notch portion 12C formed by the notch laser 16 is provided in order to obtain contact between the sprayed metal and the vapor deposited electrode. The notch 120 may be formed by cutting out the end of the vapor deposition margin 12b with a width narrower than the vapor deposition margin width as shown in FIG. 6. As a result, only one single-sided metallized film can be wound. , it has the function of a capacitor just by disconnecting it, so it is different from the conventional 2
There is no need to adjust the misalignment between two thin films and adjust the tension, which were the drawbacks of single-wound film capacitors. It also eliminates the need for lacquer coating, which is required for conventional single-wound film capacitors.

In this way, the work does not require skill and the process is simplified, making automation possible and dramatically improving productivity.

In addition, as a margin forming method, a forming method using a laser was used in the example, but it is not limited to this.
For example, there is a method of forming by a masking method during vapor deposition, or a method of scattering the vapor-deposited metal by spark discharge.

In addition, as a method for making the vapor deposition margins of the one-sided metallized films that touch and overlap alternately come to the opposite ends, in the embodiment, the vapor deposition margins of the ends are deposited every length of one rotation of the take-up bobbin. Although the metal is scattered to form a vapor deposition margin, the present invention is not limited to this method. For example, there is a method of scattering the vapor deposited metal at the end for each % rotation length of the winding bobbin to form a vapor deposition margin, etc. It is sufficient that the vapor deposition margins of the metallized film alternate at opposite ends.

Effects of the Invention As described above, the present invention includes a step of forming the margin portions so that the vapor deposition margin portions of metalized films that touch and overlap are alternately located at opposite ends, and a step of forming the margin portions of the metalized films on one side. The manufacturing method includes the steps of winding the film onto a bobbin to create a base capacitor, and cutting the base capacitor to obtain unit capacitors.The capacitor function can be achieved by simply winding and cutting a single-sided metallized film. Figure 1 shows the capacitor according to the present invention, which contributes to the industrial world by making automation possible and dramatically improving productivity because the work does not require skill and the process is simplified. FIG. 2a is a schematic diagram of an embodiment of a method for manufacturing the same capacitor;
Figure 2 is a sectional view taken along the Moum line in Figure 2 a, Figure 3
The figure shows a schematic diagram of the step of cutting to obtain unit capacitors in the capacitor manufacturing method of the present invention, FIG. 4 is a perspective view of the main parts of a capacitor manufactured according to an embodiment of the present invention, and FIG. A perspective view showing another example of the single-sided metalized film used in the present invention, FIG. 6 is a diagram of main parts of a conventional single-sided metalized film capacitor, and FIG. 7 shows main parts of a conventional double-sided metalized film capacitor. FIG. 8 is a perspective view of the main parts of a conventional single-sided metalized film multilayer capacitor. FIG. 9 is a perspective view of the main parts of a conventional double-sided metalized film multilayer capacitor.
FIG. 0 is a perspective view of the main parts of a conventional lacquered film capacitor, and FIG. 11 is a perspective view of the main parts of a conventional lacquered film multilayer capacitor.

12... Single side metallized film, 12 &...
... Vapor deposition metal, 12b... Vapor deposition margin part, 1
20... Notch portion, 16... Base capacitor, 17... Electrode extraction portion, 18...
...Unit capacitor.

Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 Figure 5 Edit Figure 6! Figure 7 Figure 8 Figure 10

Claims (3)

[Claims] (1) A process of forming margins so that the vapor deposition margins of the single-sided metallized films that touch and overlap are alternately located at opposite ends, and this single-sided metalized film is wound around a bobbin to form the base capacitor. 1. A method for manufacturing a capacitor, comprising the steps of: making a base capacitor; and cutting the base capacitor to obtain unit capacitors. (2) The method for manufacturing a capacitor according to claim 1, wherein the end portion of the vapor deposition margin portion is cut to a width narrower than the vapor deposition margin width. (3) A method for manufacturing a capacitor according to claim 1, wherein a plurality of notches each having a depth narrower than the width of the vapor deposition margin are formed at an end of the vapor deposition margin.