JPS62256365A - Manufacture of electrode for sealed alkaline storage battery - Google Patents

Abstract

PURPOSE:To supply a constant amount of slurry to a slitter and to scrape the excess slurry to obtain a uniform electrode by arranging slurry supply nozzles right under the both ends of a forming slitter. CONSTITUTION:Slurry 4 is supplied to a coating tank 8 from a storage tank 6. A substrate 5 comprising nickel plated steel punched metal is fed to the coating tank 8 through a roller 7 and the thickness of coated active material is controlled to a specified value with a slitter 1 to form an anode plate. Slurry supply nozzles 2 are installed right under the both ends of the slitter 1, and optical sensors 3 for detecting the amount of slurry are arranged at three points under the slurry nozzles 2. By the optical sensors 3, the amount of the slurry scraped by the central part of the slitter 1 and dripping from the slitter 1 is detected. When the difference in the amount of slurry between the central part and the both ends is 1.0mm, the slurry 4 is supplemented from the slurry supply nozzles 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing plates for sealed alkaline storage batteries, in particular for nickel-cadmium storage batteries.

Conventional technology Slurry (hereinafter referred to as
A porous metal core material (hereinafter referred to as "core material") made by nickel-plating iron with t-paste (hereinafter simply referred to as "paste") is prepared by mixing the active material with a bone cracking solvent (hereinafter simply referred to as "paste") Conventionally, as shown in FIG. 4, the core material 5 is immersed in a slurry or paste (hereinafter simply referred to as "slurry etc.") 4 existing in a coating tank 8. A system was adopted in which the slurry, etc. 4 that had been deposited was scraped off with a slitter 1 and only the required amount was applied.

Problems to be Solved by the Invention When the coating tank 8 passes through the coating tank 8, some of the slugs +7-, etc. attached to the core material 5 are stained by gravity, while leaving the coating tank 8 and reaching the sword 1 to the slitter 1. An equilibrium state is created between this amount and the amount lifted from the coating tank 8, and the amount of slurry, etc. 4 actually transported to the slitter 1 is determined. η-shi, vIX
The amount pulled up from the T-tank 8 is larger in the center of the core material 5 (,
Slurry, etc. reaching slitter 1 due to the lack of both ends 4
The amount also varies accordingly. Due to this, the coating amount varies in the width direction of the core material as shown in FIG. 3, making it impossible to obtain a uniform electrode plate.

Means for Solving the Problems The present invention is characterized in that nozzles for supplying slurry, etc. are installed directly below both ends of a forming slitter, and the thickness of the slurry, etc. scraped off by the slitter is detected by a sensor. When there is less sag at both ends than at the center, slurry, etc. is supplied from replenishment nozzles placed at both ends. As a result, the same amount of slurry or the like is applied to both ends of the core material as to the center part. 7. By using the action/non-explosion gate structure (from the second point, a certain amount of slurry, etc. is delayed to the slitter and scraped off like IW1, making it possible to obtain a uniform electrode plate.

Example A slurry etc. 4 made by kneading cadmium oxide powder and an aqueous solution of carboxymethyl cellulose was prepared as shown in FIG.
A core material 5 made of punched metal, which is nickel-plated iron, is supplied from a storage tank 6 to a coating tank 8, and is fed into the coating tank 8 via a roll 7, where it is divided into a predetermined order by a slitter 1.
．． 8 m to 0.9 m) IU active material was applied to produce a cathode plate. As shown in FIGS. 1 and 2, the paste supply system to both ends of the core material 5 is as shown in FIGS.
A nozzle 2 for replenishing slurry, etc. was installed, and optical sensors 3 for detecting the amount of paste were placed at three locations (at both ends and in the center) below the nozzle 2.

This optical sensor 3 allows the central slitter 10-
Therefore, when there is a difference of 1.0 cm between the amount of paste scraped off and dripping from that at both ends, the replenishment nozzle 2 placed at both ends
300aj/lll1n of slurry etc. was replenished from the tank.

Effects of the Invention Comparing the electrode plate manufactured by the present invention and the electrode plate manufactured by the conventional method, it is found that the conventional electrode plate has a thickness of about 2.
While there was a difference in coating load of ~5 Yu, the electrode plate according to the second invention was almost uniform, and a stable product could be obtained.

From the above points, the method according to the present invention has extremely great industrial value.

7'L side view, front view, and Figure 3 are conventional electrode plates.
Figure 4, which shows the distribution of TL coating, is a schematic diagram showing four methods of coating slurry or paste.

1 is a slitter, 2 is a slurry swam nozzle, 3 is an optical sensor, 4 is a slurry etc., 5 is a core material, 6 is a storage tank,
7 is a roll, 8 is a coating tank, 1190 people #Kobe Koki Co., Ltd. Yasushi Kazui ゛°Yune' Figure 1 Figure 2

Claims (1)

[Claims] When applying slurry or paste-formed sintered substrate raw materials and active materials to a porous metal core pulled up vertically through a slitter to a predetermined thickness, nozzles installed directly below both ends of the slitter A method for producing electrode plates for a sealed alkaline storage battery, which is characterized by coating while supplying sintered substrate raw materials and active materials in the form of slurry or paste.