JPS6174323A - Anode molding apparatus for sintered type electrolytic battery - 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 the Invention The present invention relates to an anode forming apparatus for a sintered electrolytic capacitor that forms a powder material.

The structure of the conventional example and the points therebetween As the structure of the conventional sintered electrolytic capacitor molding device is shown in FIG. Insert ejector pin 2 from
The mold 1 is filled with powder material 3 for a sintered electrolytic capacitor with a binder added, and then an electrode wire 4 is inserted from above as shown in FIG.
The molding pan and punch 5 holding the molding material are lowered, and the electrode wire 4 is inserted into the powder material 3. At the same time, the powder material 3 is pressurized and molded to a predetermined size by the molding punch 5. Next, the molded body in the state shown in Fig. 3 was taken out, and an anode for a sintered electrolytic capacitor as shown in Fig. 4 was made.

However, in the above-mentioned apparatus, when the shape of the molded object is miniaturized, the opening of the mold 1 becomes smaller, and if the powder material 3 is simply allowed to fall naturally from above, it will not be able to enter the inside of the mold 1. This has the disadvantage that the weight of the molded body is not uniform because it may not be filled, and the capacity of the completed sintered electrolytic capacitor is therefore non-uniform.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides an anode for a sintered electrolytic capacitor in which the weight of the compact is uniform even if the shape is small, and the capacity of the sintered electrolytic capacitor is uniform after completion. The present invention provides a molding device.

Components of the Invention The present invention provides a molding die shaped after the anode shape of a predetermined sintered electrolytic capacitor, and a molding material made by adding a binder and a plasticizer to the sintered electrolytic capacitor powder material and kneading it to give it plasticity. a molding punch that holds an electrode wire inside and pressurizes the molding material with the electrode wire protruding by a predetermined amount from its tip; and an ejection bin that extrudes the molded object from the mold. Regardless of the shape of the mold, a certain amount of molding material is completely filled into the mold and then pressure molded, so even if the shape of the molded product is small, the weight is uniform. Therefore, it has the unique effect that the capacity of the sintered electrolytic capacitor after completion becomes uniform.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 shows a sectional view of an anode forming apparatus for a sintered electrolytic capacitor according to a first embodiment of the present invention. In FIG. 6, 10 is a sintered electrolytic capacitor powder material with a binder,
11 is a cylinder containing the molding material 10, 12 is an extrusion port provided at the tip of the cylinder 11, and 13 is a plunger that pressurizes the molding material 1o in the cylinder 11. , 14 is a mold for molding the anode shape of a predetermined sintered electrolytic capacitor, and the opening thereof is in contact with the extrusion port 12, 15 is an electrode wire, 16 is a molding punch holding the electrode wire 15, and 17 is a molding die. This is an ejection pin for ejecting the molded body from the mold 14.

The operation of the anode forming apparatus for a sintered electrolytic capacitor configured as described above will be described below.

First, as shown in Fig. 6, the tip of the cylinder 11 and the mold 1 are
4 is in contact with the molding material 10 using the plunger 13.
A constant pressure is applied to extrude the molding material 10 into the mold 14. At this time, the molding material 10 is forcibly extruded into the mold 14, so that a fixed amount of the molding material 1o is completely filled into the mold 14, regardless of the shape of the mold 14. Next, as shown in FIG. 7, the mold 14 and the cylinder 1
1 are relatively moved while in contact with each other, and at this time, the molding material 10 is sheared at the opening of the extrusion port 12, and a certain amount of the molding material 10 is separated into the mold 14. Next, as shown in FIG. 8, the electrode wire 15 is inserted into the molding material 1o using a molding punch 16 that holds the electrode wire 15 inside and has a certain amount of electrode wire 16 protruding from the tip, and at the same time, the molding material 1o is molded. The material 10 is pressure molded to a predetermined size. Next, as shown in FIG. 9, the molded body is ejected to the outside using the ejecting pin 17, and at the same time the molding punch 16 is moved back to take out the molded body with the electrode wires connected thereto.

As described above, according to this embodiment, the molding material 10 having plasticity is forcibly extruded from the cylinder 11 into the mold 14, and a constant amount of the molding material 10 is extruded regardless of the shape of the mold 14. After it is completely filled into the mold 14, the electrode wire 16 is inserted with the molding punch 16, and the molding is performed under pressure. Therefore, even if the shape of the molded product is small, the weight is uniform, and therefore the sintering after completion is easy. The capacity of the type electrolytic capacitor can be made uniform.

Effects of the Invention As described above, the present invention uses a mold modeled after the anode shape of a predetermined sintered electrolytic capacitor, and a powder material for the sintered electrolytic capacitor that is kneaded with a binder and a plasticizer to give it plasticity. an extrusion means for extruding the molding material, a molding punch that holds an electrode wire inside and pressurizes the molding material with the electrode wire protruding by a predetermined amount from the tip; and a molded object from the mold. By providing an ejector bottle that protrudes the material, the material is completely filled into the mold and then press-formed, so even if the shape of the molded product is small, the weight of the molded product is uniform, and the weight of the molded product is uniform after completion. The capacity of the sintered electrolytic capacitor can be made uniform, which has a great effect.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing the steps of a conventional anode forming apparatus for a sintered electrolytic capacitor, FIG. 4 is a cross-sectional view of an anode for a sintered electrolytic capacitor, and FIG. 5 is a cross-sectional view showing the implementation of the present invention. A cross-sectional view of an anode forming apparatus for a sintered electrolytic capacitor in the example, and FIGS. 6 to 9 are cross-sectional views showing the operation of the anode forming apparatus for a sintered electrolytic capacitor in the same example. 1.14...Mold, 2,17...Eject pin, 3...Powder material, 4,15...
・・Electrode wire, 6° 16・・・Forming punch, 10・
...Molding material, 11.../Rinder 11
2...Extrusion port, 13...Plunger. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5 Figure 7

Claims (1)

[Claims] a mold shaped in the shape of a predetermined sintered electrolytic capacitor anode; an extrusion means for extruding a molding material made by adding a binder and a plasticizer to the sintered electrolytic capacitor powder material and kneading it to give it plasticity; A sintering device comprising: a molding punch that holds an electrode wire inside and pressurizes the molding material with the electrode wire protruding from the tip by a predetermined amount; and an ejector pin that protrudes the molded body from the mold. Anode forming equipment for electrolytic capacitors.