JPS60115162A - Slit device used to apply slurry in making alkaline storage battery plate - Google Patents

Abstract

PURPOSE:To make it unnecessary to perform polishing in the following processes by scraping off a slurry adhering to non-perforated areas which should be free from the slurry by installing tops, intermittently in pressure contact with the surfaces of the non-perforated area, facing each other. CONSTITUTION:Tops 8 and 8' intermittently in pressure contact with the surfaces of the non-perforated area (a) of a core member 1 are placed facing each other. The tops 8 and 8' are attached to the lower surfaces of center guides 6 and 6'. At least one of the tops 8 and 8' is constantly pushed toward the core member 1 by means of a spring 10 which is hung between a pin 9 inserted in the center guide 6 and a pin 9' inserted in the top 8. Since surfaces of the tops 8 and 8' pushed on the core member 1 consists of polished specular surfaces, it is possible to scrape off a slurry adhering to the non-perforated area (b).

Description

[Detailed description of the invention] The electrode plates of a nickel-cadmium storage battery are made by applying a slurry made of nickel powder and a binder to a core material made by nickel-plating a punched perforated rolled steel plate and sintering it. It is made by impregnating the active material into the formed micropores. The present invention relates to a slit device used during slurry coating 41.

Conventionally, the tab portion serving as the current collector terminal of the electrode plate has been made by welding a plate-shaped metal piece after cutting the electrode plate. in this way,
There were drawbacks such as the large number of man-hours, making it difficult to reduce costs, and the particles generated during welding sometimes penetrating the separator and causing short circuits.

Therefore, recently, a method has been used in which a non-porous portion is left in the core material and a tab is integrally formed using this non-porous portion when cutting the outer shape of the electrode plate. The tab is welded to the battery can or lid during the assembly process, but if sintered material is attached to the surface, the welding will be insufficient, so the surface must be kept clean. Conventionally, the method of removing the sintered body by polishing the non-porous part with a rotating brush after sintering has been adopted, but this method has problems in terms of the time required for the work and the working environment, and the core material surface The disadvantage was that even the nickel plating layer on the surface was removed, making it susceptible to rust.

The slitting device of the present invention is similar to the conventional method in that the coating thickness is adjusted immediately after applying the slurry, but at the same time, it also scrapes off the slurry that adheres to the areas where the slurry is applied (and does not need to be polished in the subsequent process).

The aim is to manufacture electrode plates that do not require

Hereinafter, the present invention will be explained using IK.

FIG. 1 is a conceptual diagram of the process of applying slurry to the core material. The core material l is fed from the right side in the figure, and is passed through guide rollers 2 and 3.
was guided into the slurry vat 4 and coated with slurry 5? l
I will be treated. The core material 1 coated with the slurry 5 is pulled up from the vat 4, and as it passes through approximately the center between the slits 7.7' by the center guide 6.6', the excessively adhered slurry is scraped off and the core material 1 is thickened. After the temperature is adjusted, it is sent to the drying process.

The center guide 6.6' is provided with protrusions at opposing positions as shown in FIG.
It guides the slurry so that it passes approximately in the center between them, and prevents the slurry from shifting to only one side relative to the core material.

In the conventional apparatus, after uniformly applying the slurry to the core material 1 and sintering it, the sintered body was removed only from the non-porous portion of the core material, as shown in FIG. Here, a is an opening, which is impregnated with an active material and participates in charging and discharging. The non-porous part is the part from which the sintered body is removed and becomes the tab part when the electrode plate is cut.

An example of the cutting method is shown in FIG. After impregnating the active material, the core material 1 is cut off as shown in the figure to obtain individual O electrode plates]'.

The slitting device of the present invention is shown in FIGS. 5 and 6. The present slitting device is characterized in that pieces 8 and 8', which come into contact with the non-porous portion of the core material l, are provided at opposing positions.

For example, the pieces 8.8' are attached to the lower surface of the center guide 6.6', and at least one piece 8 has a pin 9 provided on the center guide 6 and a pin 9' provided on the piece 8 itself. The core material 1 is always pressed in the direction of the core material 1 by a spring 10 suspended between the core material 1 and the core material 1. Further, one opposing piece 8' is semi-fixedly attached by a stopper S provided on the center guide 6'. In this way, if one of the 8 pieces is pressed with a spring, the position of the core material 1 will be different from the center position of the slit 7.7' due to the slight difference in spring strength when springs are used for both. This is effective in preventing the slippage of the slurry and making the thickness of the slurry applied to the apertures a of the core material 1 uniform. The surface of the piece 8.8' that is pressed against the core material 1 is polished to a cast surface, and the slurry that has adhered to the non-porous part can be sufficiently scraped off.

At this time, it is structurally simpler to install the spring IO in the space within the center guide 6 and allow the top 8 to slide within the space, as shown in Figure tfi7. by the way,
If such a structure is adopted, during use, the slurry will enter the contact surfaces of the center guide 6 and the piece 8, and the movement will not be smooth, and the slurry will not be scraped off sufficiently by the pieces 8 and 8'. I'm used to it. When you have gotten used to it, as shown in Figure 5, the spring lO
It is preferable to install the top 8 in an open space so that the top 8 always moves smoothly.

Next, if the pieces 8 and 8' are closed by the springs IO when the core material 1 is passed between the slit devices at the beginning of the work, the work becomes very troublesome.

Therefore, it is preferable to provide an opening/closing mechanism for the top 8 as shown in FIGS. 5 and 6. That is, a top opening/closing bar 11 is provided at the rear end of the center guide 6 (the edge opposite to the core l side), and when the bar 11 is slid, its slope 12 pushes the pin 9' backward, The piece 8 moves in the direction away from the core l, and a gap is created between the pieces 8 and 8', so the core 4
．． 4t can be easily passed between the slit devices.

Since the electrode plates manufactured using this slitting device do not have any slurry attached to the non-porous parts, there is no need to polish and remove the sintered body in the subsequent process (this makes it possible to weld tabs to battery cans and lids). In addition, unlike polishing with a rotating brush, there is almost no damage to the nickel plating layer on the core material 1, so there is no chance of rust on the tab (such as when used in industrial applications such as Naru). Its value is extremely large.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of the process of applying slurry to core A, Figure 2
The figures are a top view of Fig. 1, Fig. 3 is a plan view of the core material to which slurry is applied, Fig. 4 is a plan view showing the cutting method for cutting out the electrode plate from the core material holding the active material, and Fig. 5 The figures are a cross-sectional view showing one embodiment of the slitting device of the present invention, FIG. 6 is a bottom view 1 of FIG. 5, and FIG. 7 is a cross-sectional view C showing another example of the present invention. 1 is a core material, 1' is a single electrode plate, 2.3 is a guide roller,
4 is slurry butt, 5 is slurry, 6.6' is center guide, 7.7' is slit, 8.8' is piece, 9.9' is bottle, 10 is spring, 11 is piece opening/closing bar, 12 is slope , a is the perforated part of the core l, b is the non-perforated part of the core, and S is the stopper in Fig. 1.

Claims (1)

[Claims] ■. A slurry is applied to a colored core material that has a row of apertures with a large number of holes and a row of non-porous parts that become tabs when made into an electrode plate, and gaps of a predetermined thickness are formed. A slit device for adjusting slurry coating thickness of an alkaline storage battery electrode plate, in which pieces facing each other are provided to elastically press against a non-porous portion of a core material from both sides thereof. 2. A slit device for applying slurry to an alkaline storage battery electrode plate according to claim 1, wherein one of the opposing pieces is elastically pressed against the non-porous portion of the core material, and the other is fixed.