JPH0685383B2 - Sealing plate for capacitors - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a sealing plate for capacitors used in aluminum electrolytic capacitors and the like.

[Prior art]

In an aluminum electrolytic capacitor or the like, as a capacitor sealing plate to be attached to the opening of a cylindrical case, the one shown in FIGS. 5 (a) and 5 (b) has been conventionally provided. In this case, the external terminal 11 is arranged on one side of the sealing plate 1 formed of a laminated plate of thermosetting resin, and the washer 14 is arranged on the other side of the sealing plate 1, and the bent base portion of the external terminal 11 is arranged. By pressing the rivet 12 into the through hole 10 formed in the sealing plate 1 from 11a and inserting the washer 14 into the rivet 12 and caulking the external terminal 11, the external terminal 11 is attached to one side of the sealing plate 1 while protruding. The tip of the rivet 12 is used as the internal terminal 12a so as to project from the other surface of the sealing plate 1. In the capacitor sealing plate thus created, the internal terminals 12a are inserted into the cylindrical capacitor case 13 to
It is used by attaching it to the opening.

[Problems to be Solved by the Invention]

In the sealing plate for capacitors created as described above,
Since the external terminal 11 is used to fix a capacitor to a printed circuit board or the like, it is necessary to have strength. Therefore, the external terminal 11 is made of a metal having high strength such as iron (steel). On the other hand, since the internal terminal 12a comes into contact with the capacitor liquid or the like, if the impurities are included, it may adversely affect the capacitor liquid.
The rivet 12 constituting a is made of a metal with few impurities such as high-purity aluminum. For this reason, it is necessary to assemble using the external terminal 11 and the internal terminal 12a that are made as different members, the number of parts increases, the number of assembly steps also increases, and there is a problem that productivity is poor. . The present invention has been made in view of the above points, and an object of the present invention is to provide a sealing plate for a capacitor that can be manufactured with high productivity by reducing the number of parts and the number of assembly steps.

[Means for Solving the Problems]

In the capacitor sealing plate according to the present invention, the terminal 2 is formed of a composite metal material in which one end and the other end are integrally made of different metals, and one end serves as the external terminal 2a and the other end. It is characterized in that the terminal 2 is attached to the sealing plate 1 so as to penetrate the front and back sides of the sealing plate 1 so that the portion protrudes as the internal terminal 2b.

[Action]

In the present invention, the external terminal 2a and the internal terminal 2b are made of different metals by forming the terminal 2 from a composite metal material in which one end and the other end are integrally made of different metals. Since it is not necessary to use the one formed in the above, the number of members and the assembly can be reduced.

【Example】

Hereinafter, the present invention will be described in detail with reference to examples. The sealing plate 1 is made by injection molding or transfer molding of thermosetting resin such as phenol resin, epoxy resin, urea resin, melamine resin, unsaturated polyester resin, or thermoplastic resin such as PET, PBT, PPS. It is a thing. Then, when the sealing plate 1 is formed in this manner, at the same time, the substantially central portion of the terminal 2 is inserted into the sealing plate 1 and the pair of terminals 2 is attached, whereby a capacitor as shown in FIG. 1 and FIG. The sealing plate A for use is prepared. The resin for molding the sealing plate 1 may be either a thermosetting resin or a thermoplastic resin as described above, but the thermosetting resin is more preferable in that it is excellent in heat resistance, chemical resistance, durability and the like. preferable. Here, the terminal 2 is made of a composite metal material in which one end side and the other end side of the substantially central portion are integrally formed of different metals. For example, one side is made of a metal with high strength such as iron (shown by the diagonal line in the lower left of the figure) and the other side is made of a metal with few impurities such as high-purity aluminum. The terminal 2 can be made of the converted composite metal material. In this way, when the terminal 2 is made of iron and high-purity aluminum, the iron-side end of the terminal 2 is used as the external terminal 2a and the high-purity aluminum-side end is used as the internal terminal 2b. It is what makes me. Therefore, it is not necessary to use the external terminal 2a and the internal terminal 2b separately made of iron and high-purity aluminum as in the conventional case, and it is possible to reduce the number of parts and the number of assembling steps. become. The sealing plate A for capacitors manufactured as described above is
Insert the internal terminal 2b into the cylindrical case 13 of the capacitor as shown in FIG.
External terminal 2a
Is used for connection and attachment to an external circuit by soldering to a wiring board or the like. Here, as described above, if the external terminal 2a is formed of a metal having high strength such as iron and the internal terminal 2b is formed of a metal with few impurities such as high-purity aluminum, the external terminal 2a forms a capacitor. It can be attached to a wiring board or the like with high strength, and it is possible to prevent impurities from acting on the capacitor liquid from the internal terminals 2b and adversely affecting the capacitor liquid. Next, the sealing plate A for capacitors prepared as described above
A construction method for producing a product in a continuous integrated process with good productivity will be described. As shown in FIG. 4 (a), the terminal 2 is made of iron on one side in the width direction (indicated by diagonally slanted lines) and the other side in the width direction is a hoop material 9 of a composite metal material integrally formed of high-purity aluminum
The hoop material 9 is formed in the shape of a relatively thin long ribbon, and is sequentially fed out from a state in which it is wound in a coil shape. Then, as shown in FIG.
To produce the terminal 2. The press device 15 is formed by punching dies 15a and 15b which are vertically opposed to each other. The hoop material 9 is formed between the punching dies 15a and 15b.
By pressing through, the terminal 2 is attached to the hoop material 9.
Can be formed. For example, as shown in FIG. 4 (b), a connecting piece 16 extending over the entire length on both sides of the hoop material 9 is formed by pressing so as to punch out and remove an unnecessary portion in the widthwise central portion of the hoop material 9. A large number of terminals 2, 2, ... Can be formed in the longitudinal direction of the hoop material 9 while being integrally bridged between the terminals 16, 16. After the terminals 2, 2, ... Are formed on the hoop material 9 in this manner, the hoop material 9 is sequentially and continuously supplied to the molding machine 17. Molding machine 17 is a mold
17a and 17b are formed so as to be opposed to each other in the vertical direction. The sealing plate 1 is formed by resin molding such as injection molding or transfer molding between the upper and lower molds 17a and 17b. is there. The terminals 2 are simultaneously attached to the sealing plate 1 when the sealing plate 1 is molded in this manner. That is, the molds 17a and 17b of the molding machine 17
By supplying the hoop material 9 in the space and setting the terminal 2 of the hoop material 9 between the molds 17a and 17b, injection molding or transfer molding of the resin is performed.
As shown in FIG. 3, the sealing plate 1 and the terminal 2 are integrated by inserting the substantially central portion of the terminal 2 into the sealing plate 1 formed by resin molding. Here, each of the terminals 2 is to be inserted and attached to each of the sealing plates 1 as a set of two, and a retaining protrusion is provided at a substantially central portion of each of the terminals 2.
18 is provided to enhance the attachment strength of the terminal 2 to the sealing plate 1. After molding the sealing plate 1 in this manner, the hoop material 9 provided with the sealing plate 1 is led out from the molding machine 17 and successively and successively supplied to the punching machine 19. The punching machine 19 is formed by including a press die, a cutter device, or the like, and cuts both ends of each terminal 2 to separate the terminal 2 from the connecting piece 16 of the hoop material 9, and FIG. It is possible to obtain the sealing plate A for capacitors as shown in FIG. The connecting piece 16 of the hoop material 9 from which the terminal 2 has been separated in this way is successively and successively fed and wound up. The present invention can be applied to an electronic component or the like in which a terminal is inserted and provided in a molded product such as DIP. In addition to forming the terminal 2 using the hoop material 9, the terminal 2 may be formed using a strip-shaped thin metal plate.

【The invention's effect】

As described above, in the present invention, a terminal is formed of a composite metal material in which one end and the other end are integrally made of different metals, and one end is an external terminal and the other end is formed. Since the terminals are attached to the sealing plate so that they project as internal terminals, the external terminals and the internal terminals can be made of different metals, and the external terminals and the internal terminals can be made of different metals. It is not necessary to use a member formed, and the number of members and assembly can be reduced and productivity can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view of the same as above, FIG. 3 is a schematic front view of an example of an apparatus used for manufacturing the same, and FIGS. 4 (a) and (b). FIG. 5C is an enlarged plan view of a part of the hoop material used in the above, and FIGS. 5A and 5B are an exploded perspective view and a perspective view of a conventional example. 1 is a sealing plate, 2 is a terminal, 2a is an external terminal, and 2b is an internal terminal.

Claims (1)

[Claims] 1. A terminal is formed of a composite metal material in which one end and the other end are integrally made of different metals, and one end projects as an external terminal and the other end projects as an internal terminal. A sealing plate for a capacitor, characterized in that the sealing plate is formed by penetrating the front and back sides of the sealing plate and attaching terminals thereto.