JPS5843507A - Method and device for mounting insulating film on aluminum of electrolytic condenser - 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 The present invention relates to a method and apparatus for attaching an insulating film to an aluminum case of an electrolytic capacitor. If the insulation film 4 is placed automatically, 5. In order to further prevent defective insulation products from being inspected, we will explain how to attach insulation films to the aluminum cases of KL electrolytic capacitors and how to place them.

In a conventional automatic erecting machine for an electrolytic cone capacitor, as shown in FIG. 1, the capacitor element 2#'i of the electrolytic capacitor 1 was directly inserted into the aluminum coil 3. However, with the recent demand for smaller electrolytic capacitors, when the length t of the aluminum case 3 becomes shorter, the width of the insulating paper 40 inevitably becomes narrower. The margin with the insulated electrode foil (not shown) has become considerably narrower. As a result, as shown in the figure, an accident occurred when the lower end 5a of the aluminum terminal 5 fixed to the electrode foil protruded from the lower end 4a of the insulating paper 4 and came into contact with the bottom 3a of the aluminum case 3, causing a short circuit. Was. As a result, the defective rate of products due to poor insulation has increased, leading to a significant drop in production efficiency.

The present invention has been made to obviate the drawbacks of the prior art described above.
The purpose of this is to place an insulating film on the bottom of the aluminum case in the process before inserting the capacitor element into the aluminum case of the electrolytic capacitor.・:, 1 Therefore, the purpose is to prevent short circuits caused by contact between the aluminum terminal fixed to the electrode foil of the capacitor element and the aluminum case. Another purpose is to prevent the occurrence of defective insulation products and improve production efficiency.

In the method of the present invention, a tape-shaped insulating film is moved intermittently at the knee before a capacitor element is inserted into the aluminum and mixer of an electrolytic capacitor, and the insulating film is moved in a cooperative manner with a die. Punch it out with a punch,
The punch is then inserted into the aluminum case and the punched insulating film is placed on the bottom of the aluminum case. In the machine, an insulating film is placed between a turntable that holds an aluminum case with a chuck and rotates intermittently, and an insulating film across the top of the aluminum case when the limb turntable is stopped at a fixed position.
An insulating film feeding device that moves the film in a garbage-like manner, and 1! !
l#l film is punched with punch and die 1:' and 0 cooperative action Kj'f. After the punched insulating film is placed on the bottom of the aluminum case by the downward movement of the punch, the punch is raised. The present invention is characterized by comprising an insulating film punching device configured to do so.

The present invention will be explained below based on embodiments shown in the drawings. Second
As shown in the figure, a device 8 for attaching an insulating film to an aluminum case of an electrolytic capacitor according to the present invention includes a turntable 9,
The turntable 9 is equipped with an insulating film feeding device IO and an insulating film punching device 11, and rotates intermittently in the direction of arrow A with respect to the main body 12 at regular intervals. Chuck 1:l every 9flJ1 interval! The aluminum case 3 is held by the attached chuck.

□ The insulating film feeding device 10 includes an insulating film holder 15 and an insulating film winding device 16. The insulating film holder 1'5 has a base 17 fixed to the main body 12.
An insulating film 18 made of polypropylene, vinyl, Teflon, rubber, etc., wound in a tape shape, is attached to the insulating film holder. Then, when the insulating fiber 9 stops, the insulating film winding device 16 fixed to the main body 12 crosses over the chuck 13 and intermittently winds it up in the direction of arrow B at regular intervals. It has become. Note that instead of the winding device 16, the insulating film 18 may be pressed and held between a pair of rollers (not shown), and the insulating film 18 may be fed by rotating the limb rollers.

The insulating film punching device 1 is equipped with an air cylinder 20, a punch 21, an air tube 22, a punch guide 23, and a die 24. The upper end of the punch 21 is the base 1
The base 1 is fixed to the piston rod 25 attached to the air cylinder 20 fixed to the base 1 by a screw 26 and guided by the punch guide 23 fixed to the main body 12.
7 so as to be able to slide vertically. As shown in Figure 5, a hollow hole 21a with an open lower end is formed in the axial center of the punch 21, and air is fed into the upper part of the hollow hole by an air device (not shown). Alternatively, an air tube 22 for suction is connected in communication. Further, the diameter da of the punch 21 is set slightly smaller than the inner diameter d of the aluminum case 3.

The die 24 is fixed to the main body 12 and is arranged to face the punch 21 with the insulating film 18 interposed therebetween. As shown in FIG. 5, the insulating film 18 is punched out by the cooperative action of the movable blade 21b of the punch 21 and the fixed blade 24a of the die 24.

The present invention is configured as described above, and its operation will be explained below. In FIG. 2, the turntable 9 is chucked as described above. 3 holds the aluminum case 3 and rotates it intermittently in the direction of arrow A at regular intervals. Referring also to FIGS. 4 to 7, an insulating film 18 is attached to the bottom 3a of the aluminum case 3. The process of automatically placing it will be explained. When the turntable 9 rotates and comes to a position directly below the aluminum case 3, the punch 21, and the die 24, the turntable 9 stops temporarily.
21ti! Introduction, 7 pages 2 degrees. The insulating film 18, which is in a stopped state, is pushed downward by the piston rod 25 by the punch 2 and guided by the bond guide 23.
The punching is performed by the cooperative action of the movable blade 21b of No. 1 and the fixed blade 24m of the die 24. The thus-punched good insulating film 18 is inserted into the hollow hole 218 of the punch 21 in the direction of arrow C through the air tube 22, as shown by the imaginary line in FIG. is inserted into the aluminum case 3 while being attracted to the lower end of the aluminum case 3.

Next is punch 2! When the lower end of the aluminum case 3 comes close to the bottom 3a of the aluminum case 3, as shown in FIG. The insulating film 18, which had been adsorbed to the lower end of the punch 21 by the suppressing action of the air, is separated from the punch 21 and placed on the bottom 38 of the aluminum case 3. Then, while air is flowing in the same direction, punch 21F
i The air cylinder 20 moves upward in the direction of arrow E:
:1・:: Returns to position and never returns to position? Ilum 18 has aluminum case 3
air tube 22
The flow of air within stops.

After this process is completed, the turntable 9 rotates in the direction r (r) of the pitch arrow A, and in the next process, as shown in FIG. As the insulation film 18 is inserted, the insulation film 18 is wound one pitch in the direction of the arrow B by the insulation film winding device 16. As described above, the insulation film 18 is automatically placed on the bottom 3a of the aluminum case 3. is performed repeatedly.

Since the present invention is configured and operates as described above, the insulating film is automatically placed on the bottom of the aluminum case during the step of inserting the capacitor element into the aluminum case. It is possible to prevent short circuits due to contact between the aluminum terminals fixed to the electrical foil of the capacitor element and the aluminum case, and also to prevent the occurrence of defective insulation products. Since the installation is performed automatically as a process in an automatic assembly machine, the production efficiency can be greatly improved.

[Brief explanation of drawings]

Figure 1 shows a vertical 15IrlI of a conventional electrolytic capacitor.
. Figures 2 to 8 relate to embodiments of the present invention, Figure 2 is a perspective view showing the main parts of an insulating film crushing device, Figure 3 is a longitudinal sectional view of an electrolytic capacitor, and Figure 4 Figure 18 shows the step-by-step process of placing an insulating film on the bottom of the aluminum case and inserting a capacitor element into the aluminum case. Figure 4 is a vertical cross-sectional view of the aluminum case, and Figure 5 is A vertical cross-sectional view showing the state immediately before the punch descends and punches out the insulating film. Figure 6 shows the state in which the punch, in cooperation with the die, punches out the insulating film and descends to a position close to the bottom of the aluminum case. A vertical cross-sectional view, FIG. 7 is a vertical cross-sectional view showing the punch raised to the position shown in FIG.
Fig. f48 is a longitudinal sectional view showing a state in which a capacitor element is inserted into an aluminum case. 1 is an electrolytic capacitor, 3Fi aluminum case, 3 gates are the bottom of the aluminum case, 8 is a permanent film mounting device, 9 is a turntable, 10 is an insulating film feeding device, 11 is an insulating film punching device, 13 is a chuck , 18 is an insulating film, 21 is a punch, and 23 is a die. Patent ratio: 7 AI, Patent attorney representing ST Engineering Co., Ltd. 1) Kazuo, Kazuo 1. . '41 Figure ""51!8 Figure '17 Figure 6 Figure 1 □ Figure 5゛□

Claims (1)

[Claims] l In the step before inserting the capacitor element into the aluminum case of the electrolytic capacitor, 1. The tape-shaped insulating film is moved intermittently, and the insulating film is punched in half with a punch in cooperation with the die, and then the punch is inserted into the aluminum case and the punched edge film is removed. A method for attaching an insulating film to an aluminum case of an electrolytic capacitor, characterized in that the electrolytic capacitor is placed on the bottom of the aluminum case.4. The insulating film is intermittently moved across the top of the aluminum case when the turntable is stopped at a fixed position. The insulating film is punched out by the cooperative action of a punch and a die, and the film is punched with 5 liters of sand at the bottom of the front aluminum case by the downward movement of the punch, and the punch iX rises. 1. A device for attaching an insulating film to an aluminum case of an electrolytic capacitor, comprising: an insulating film punching device configured to do so;