JPS58102462A - Manufacture of anode plate for alkaline battery - Google Patents

Abstract

PURPOSE:To achieve uniform filling by coating iron fiber sintered body with a cadmium paste, passing between several stages of filling rollers and scraping off the paste of the surface with a slitter having a round tip. CONSTITUTION:A core plate 12 is fed from an uncoiler 11 and passed in a paste prepared by dispersing cadmium oxide powder and nickel powder in ethylene glycol to coat the surface of the core plate 12 with the paste and drawn out. The core plate is passed between rollers 16, 17, 18 having paste return scraper 15, 19, 20 so as to press the paste and squeeze out excess paste. Then the paste on the surface is scraped off with a slitter 21 having a round tip 21-1. Therefore, breakage caused by stress concentration is eliminated, and the filling is adjusted uniformly, and workability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the manufacturing method of cathode plates for alkaline batteries made of Elanal-Cadmium and Silver-Cadmium. The purpose of this is to prevent cutting due to sharp edges and to uniformly adjust the amount of paste filled.

Sintered iron fibers are used as the conductive core of the paste-type cadmium cathode plate of nickel-cadmium batteries.
The continuous manufacturing method for this paste-type 1k4F+ plate is as shown in FIG. This is passed through a cadmium paste 4 in which cadmium oxide powder and nickel powder stored in a popper 3 are dissolved in Enerender Recall (1), and the cadmium paste is applied to both sides of the core 2 and pulled up. The core body 2 coated with this Kadodentsumu base) 4 has a pair of opposing knife-shaped holes ^
After passing through the slit body 5 for adjusting the paste filling, remove the excess paste (I or lt) and make the paste filling amount uniform, then move upward! 1 is introduced into a drying oven 6, where it is dried, turned over by a turn mill 7, transferred by a pair of feed rollers 8, and passed between a pair of rolling mills 9 to a uniform thickness. After being pressurized, it is wound up on the Ricoi Two 10.

#11 was used to manufacture this series of base Y-dori boards.

The slit body for adjusting the thickness of the paste filled into the iron fiber sintered core body consists of a pair of opposing knife-shaped jigs 5 shown in the second WJ, and each jig has a cross section 11cJI) and a diagonal tj
The opposing tips 5-1 as seen in nE@ are sharp edges for scraping. In a slit body having such a shape, the same layer often occurs, resulting in non-uniform filling of the filling pace and breakage of the core. This is due to fluctuations in passage resistance due to changes in the amount of excess paste scraped off by the slit body.

As the cadmium paste moves upward, it is pressurized by the pressurizing inclined surface of the slit body and is filled into the fiber space. Then, the excess paste is scraped off by a scraping section consisting of a pair of opposing acute-angled ends that maintain the widest gap between each other, to a desired thickness, and exits above the slit body. The scraped off excess base tries to flow down, coats the core, and mixes with the paste that comes up. In this case, there were interlayers where non-uniform filling occurred because the passing resistance varied due to the quantitative change of the surplus base, stretching the fiber sintered core and oxidizing the filling space. In extreme cases, the sintered core may break.The present invention minimizes the stress on the core by dispersing the passage resistance and chemotacticing by using multiple sets of filled row twos. , provides a PACE F filling method for a continuous base tainer that makes the filling amount uniform and prevents cutting of the core. Examples thereof will be described below.

FIG. 5 shows a based filling method according to one embodiment of the present invention. A paste filling device is used, which has a pair of pads in several stages each with a thin plate for returning the paste, and has a slit body with a rounded tip in its cross section for scraping off the surface-adhered base. . An uncoiler 11 sends out a porous metal core body 12 of an iron fiber sintered body having a fiber diameter of 2 to 50 μm, which has been subjected to one-layer plating treatment. This is passed through a cadmium paste 14 in which cadmium oxide powder and nickel powder stored in a paste potper 13 are dissolved in ethylene dalycol, and the cadmium paste is coated on both sides of the core 12, and then pulled up. Excess paste is squeezed off from the core body coated with this corner paste 14 by a pair of rollers 16 provided with a first-stage paste return scraper 15. The interval between the first stage diaphragms is wider than the thickness of the core. A part of the excess pace squeezed by the W-2 flows down, and a part of it is pressurized by the lens barrel U-, adheres to the W-2 surface, and is lifted up. The lifted surplus paste is scraped off by paste return scrapers 19 and 20 attached to the respective scrapers 17 and 18, and is returned to the paste popper 15. Some of the core filled under pressure is pulled up by the rollers 16 in the first stage and is then moved to the second stage.
It is introduced into the p-toe 17 of the stage. In this case too, the excess paste is squeezed out by a pair of glue sticks equipped with paste return scrapers 19. The aperture interval in the second stage is stepped to be equal to the thickness of the core. Even in this case, some of the excess paste flows down, and some of it adheres to the stomach and is lifted up. The lifted excess paste is scraped off by a paste return scraper attached to each stomach-to and returned to the popper 1!1. Depending on the i degree of pressurization, pressurized filling is performed by the ratio of -18 in the third stage.

After that, in order to scrape off the paste adhering to the surface, a slit # is formed in which the tip 21-1 of the cross-sectional shape is rounded.
By scraping off the cadmium paste adhering to the core surface using 21.

Finally, adjust to the desired thickness.

According to the filling method according to the present invention, there is no slippage unlike the conventional method.
Non-uniform filling due to fluctuations in passage resistance at the rest portion does not occur, and breakage due to stress concentration on the core does not occur.

By providing several stages of filling, it is possible to avoid local concentration of passing resistance on the core, and a return paste scraper is installed to prevent mixing with paste (P-X). This is because there are fewer matches.

Furthermore, when scraping off the surface paste in the final stage,
In order to prevent cutting by the sharp edge of the slit ice body, a slit body having a shape with a rounded tip in cross section was provided. -1- Filling regulation alone will not be enough to scrape off the paste, so it is necessary to improve the filling uniformity. It is of great value to Koto.

[Brief explanation of the drawing]

Figure 1 shows the continuous manufacturing method for paste-type cadmium cathode plates. Figure 2, vli, is a cross-sectional view of a conventional slitter (
4), a perspective view (6), and FIG. 3 are process diagrams of a manufacturing method according to an embodiment of the present invention. 5... Slit body 5-1-... Tip of slitter 11... Uncoiler - 12... Iron SM sintered body 13.
...Paste potsupah 14...Kadden Tsumu Paste 15.19.20...Scraper 16.17.1
8... p-ler 21... Slit body Applicant Yuasa Battery Co., Ltd. Kinsha Diagram Diagram 2 (A) Figure 3

Claims (1)

[Claims] When filling a paste-like active material made of ethylene dalycol, cadceum oxide, and nickel powder using a conductive core made of an iron fiber sintered body with a fine diameter of 2 to 50μ, a filling roller equipped with a starrer for returning the paste and a surface adhesion are used. A method for producing a cathode plate for an alkaline battery, characterized by using a slit body having a rounded tip at the cross-sectional end from which the paste is scraped.