JPH10199757A - Electrode terminal for electrolytic capacitor coated with film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the film at the external surface of a capacitor from being damaged or broken, by putting the free end of a lead wire in such a condition that it is free of angle projecting outward. SOLUTION: In an electrode terminal for an electrolytic capacitor where a film is attached to the external surface of the case, there are edge burrs 26 or a transverse burr 30 at the free end of the lead wire 16 retained by a retaining means 32. The free end of this lead wire 16 is arranged to face the chamfering tool 36 attached to a rotating means 34. This chamfering tool 36 is attached freely of mounting and removal to the rotating means 34, and the rotating means 34 and the chamfering means 36 shift to the lead wire 16. Moreover, this chamfering tool 36 cuts the outer edge of the free end of the lead wire 16 into such form that there is no angle projecting outward. Then, the outer end of the free end of the lead wire 16 is cut in circular form, and the outer edge burrs 26 and the transverse burr 30 are removed. Hereby, even if the outer edge of the free end of the lead wire makes contact with the film at the external surface, it never damages the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode terminal for use in an electrolytic capacitor having an outer surface coated.

[0002]

2. Description of the Related Art FIG. 5 shows electrode terminals used in an electrolytic capacitor. The tab terminal 10 is formed by welding a lead 14 and a tab 14 having a flat portion 12 at one end. A capacitor element such as a foil is wound around the flat portion 12 of the tab terminal 10, the capacitor element is housed inside a capacitor case, and the leads are exposed to the outside of the case to form a capacitor. As shown in FIG. 6, the capacitor 18 has a case 20 and two lead wires 16 on the surface. In order to display the model number, characteristics, and the like of the capacitor 18, a resin-based insulating film 22 on which the display is printed is mainly applied to the outer surface of the case 20. Thereafter, a capacitor 24 having a coating in which the coating 22 is adhered to the case 20 by heating is used.

FIG. 7 is a front view of a free end of the lead wire 16.
8 is shown in FIG. Lead wire 1
6 is cut to a predetermined size.
An outer edge burr 26 is formed on the outer edge of the free end of No. 6, and a diametrically crossing burr 30 is formed on the end surface 28 of the free end of the lead wire 16. Both the outer burr 26 and the transverse burr 30 are corners that protrude outward at the free end of the lead wire 16.

[0004]

In a process (FIG. 6) for integrating the coated capacitor 24 as a finished product in a box or the like (FIG. 6), the outer burrs 26 and the transverse burrs 30 at the free ends of the lead wires 16 There has been a problem that the coating 22 on the outer surface of the coated capacitor 24 is damaged or broken. Furthermore, the lead wire 1 is also used in the subsequent transport process and the like.
The outer edge burr 26 and the transverse burr 30 at the free end of No. 6 may damage or break the coating 22 of the coated capacitor 24.

The present invention has been made in view of the above points, and provides an electrode terminal for an electrolytic capacitor provided with a coating that eliminates burrs at the free ends of the lead wires so that the coating is not damaged.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is used for an electrolytic capacitor having a coating on its outer surface. The present invention relates to an electrolytic capacitor electrode terminal comprising a tab and a lead wire. The free end of the line has a shape without corners protruding outward.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a partial sectional view of an apparatus for producing an electrode terminal for a coated electrolytic capacitor. In the present invention, the same reference numerals as those in FIGS. 5 to 8 denote the same members. The electrode terminal for an electrolytic capacitor according to the present invention is applied to a capacitor used for attaching a coating to the outer surface of a case. The lead 16 is held by the holding means 32
Is held. An outer edge burr 26 and a transverse burr 30 are formed at the free end of the lead wire 16. The free end of the lead 16 is placed facing a chamfering tool 36 attached to the rotating means 34. This chamfering tool 36
Is detachably attached to the rotating means 34. Although the rotating means 34 and the chamfering tool 36 are set to move with respect to the lead 16, the lead 16 and the holding means 32 may be moved.

The chamfering tool 36 is for cutting the outer edge of the free end of the lead wire 16 into a shape having no corners protruding outward, as shown in FIGS. For example, if the outer edge of the free end of the lead wire 16 is cut into an arc shape (circular outer edge portion 38) using the chamfering tool 36, the outer edge burr 26 can be removed. This chamfering tool 3
6, the outwardly projecting corners of the transverse burr 30 of the end face 28 of the free end of the lead 16 are also removed at the same time. As for the removal of the transverse burrs 30, as shown in FIG. 2, it is desirable to remove the entirety of the transverse burrs 30 protruding from the end surface 28 of the free end of the lead wire 16, but as shown in FIG. A configuration may be used in which only the sharp corner of the protruding tip of the cross burr 30 is shaved to leave the ridge 40. With the chamfering tool 36, the free end of the lead wire 16 can be cut into any shape, but the outer edge of the free end of the lead wire 16 is cut into a shape without corners protruding outward,
At least a sharp corner of the projecting tip of the transverse burr 30 of the free end face 28 is cut. As a result, the outer burrs 26 and the transverse burrs 30 at the free ends of the lead wires 16 are completely removed, so that the outer edges of the free ends of the lead wires 16 come into contact with the coating 22 (see FIG. 6) on the outer surface of the capacitor. Even
The coating 22 is not damaged. The processing of the lead wire 16 using the rotating means 34 and the chamfering tool 36 can be performed at a high speed, and can be incorporated in the manufacturing process of the electrode terminal for the electrolytic capacitor. That is, a step of removing the outer edge burrs 26 and the transverse burrs 30 while holding the lead wires 16 to form the flat portions 12 on the tabs 14 is added.

Next, another means for removing the outer burrs 26 and the transverse burrs 30 of the lead wire 16 is shown in FIG. The lead 16 is held by holding means 42. Lead wire 1
The free end of 6 is arranged facing the electric discharge tool 44 moving with respect to the lead wire 16. The electric discharge machining tool 4
4, the holding means 42 may be moved. Here, for example, the free end of the lead wire 16 is subjected to electric discharge machining by supplying electricity with the electric discharge machining tool 44 as an anode and the holding means 42 as a cathode. By this electric discharge machining, the free end of the lead wire 16 can be machined into a shape without corners protruding outward. That is, the outer edge burr 26 and the cross burr 30 shown in FIG. 7 are cut. By changing the discharge conditions such as the frequency and voltage of the electric discharge machining tool 44, the free end of the lead wire 16 is machined (cut) into a shape having no corners as shown in FIGS. 26 and the cross burr 30 can be completely removed.

[0010]

As described above, according to the electrode terminal for an electrolytic capacitor provided with the coating according to the present invention, the free end of the electrode terminal is cut into a shape having no corners protruding outward. In addition, it is possible to prevent the coating on the outer surface of the capacitor from being damaged or broken when the capacitor is dropped or transported.

[Brief description of the drawings]

FIG. 1 is a partial front view of an apparatus for manufacturing an electrode terminal for an electrolytic capacitor provided with a coating according to the present invention.

FIG. 2 is a front view of a free end of a lead wire of an electrode terminal for an electrolytic capacitor provided with a coating according to the present invention.

FIG. 3 is another front view of a free end of a lead wire of an electrode terminal for an electrolytic capacitor provided with a coating according to the present invention.

FIG. 4 is a partial sectional view of another apparatus for manufacturing an electrode terminal for an electrolytic capacitor provided with a coating according to the present invention.

FIG. 5 is a front view of an electrode terminal for an electrolytic capacitor.

FIG. 6 is a configuration diagram illustrating a process of attaching a film to a capacitor and integrating the film.

FIG. 7 is an enlarged front view of a lead wire of an electrode terminal for an electrolytic capacitor.

8 is a view in the direction of arrow A in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrode terminal for electrolytic capacitors 14 Lead 16 Lead wire 26 Outer edge burr 30 Crossing burr 32 Holding means 34 Rotating means 36 Chamfering tool 38 Arc-shaped outer edge 42 Holding means 44 Electric discharge machining tool

Claims (1)

[Claims] 1. An electrolytic capacitor having an outer surface coated with a film, wherein an electrode terminal for an electrolytic capacitor comprising a tab and a lead wire has a shape in which a free end of the lead wire has no corner protruding outward. An electrode terminal for an electrolytic capacitor provided with a coating characterized by the following.