JPH02192657A - Paste filling machine for lead storage battery - Google Patents

Abstract

PURPOSE:To reduce the dispersion of paste filling quantity and enable stable long-time operation by providing a predetermined gap between the internal surface of a hopper and the external surface of a screw. CONSTITUTION:As a gap 9 is formed between the internal surface of a paste hopper 3 and the external surface of a screw 4, a paste 4 pressed inside with the screw 4 is filled into a grid body 7 and carried outside the paste filling machine in the title. In addition, an excessive paste or a part of the paste 5 pressed down to the lower part of the hopper 3 by the screw 4 but remaining without being filled in the grid body 7, rises along the gap 9. Therefore, though the filling pressure of the paste 5 to the grid body 7 drops slightly, it becomes easy to make adjustment for a paste pressing quantity and a paste filling quantity. No abnormality thus occurs during long period of operation and the filling pressure of the paste 5 becomes stable, resulting in the reduction of the dispersion of the paste filling quantity.

Description

[Detailed description of the invention] Industrial use! PF The present invention relates to an improvement of a paste filling machine for a paste type ship storage battery.

PRIOR ART AND ITS PROBLEMS Plate plates for paste-type lead-acid batteries are manufactured by filling a grid made of lead alloy with battery paste, and are one of the important components that determine the quality and performance of lead-acid batteries. In particular, the amount of paste filled into the grid has a large effect on the performance of the lead-acid battery, and strict control of the amount of paste is essential in order to manufacture a lead-acid battery that has the performance as designed. However, in the currently commonly used manufacturing method of electrode plates for lead-acid batteries, it is difficult to control the amount of paste filling, and lead-acid batteries of consistent quality cannot be obtained.

Conventionally, the filling machine that has been used to manufacture rear plates for lead-acid batteries has a hopper with a pair of rolls and an agitator installed at 6'fp+ inside, as shown in Japanese Patent Publication No. 48-40928. The paste is filled through a grid fed by a belt conveyor.

The amount of paste filling is determined by adjusting the thickness of the filled electrode plate at the hopper outlet, but in reality, the variation in the amount of paste filling is very large. Possible reasons for this are as follows.

(1) The properties of the paste are not necessarily constant.

(2) The amount of paste supplied within the hopper fluctuates.

(3) The belt conveyor (filling belt) generally uses a cloth belt, but it deforms depending on the filling pressure of the paste, so the filling amount is not constant.

(4) Since there are variations in the thickness and weight of the lattice bodies themselves, the variations in the amount of paste filling become even larger.

For this reason, in reality, electrode plates are manufactured by frequently weighing the filled electrode plate to determine the amount of paste filling, and adjusting the filling machine each time, but there is a limit to this, and paste filling Quantity control is an extremely difficult problem.

As a result of further investigation into the causes of the above-mentioned variations in paste filling amount, we found that the paste filling pressure of the grid body is extremely weak because the conventional paste filling machine uses a pair of rolls to extrude the paste to the bottom of the hopper. I know this is the cause.

Furthermore, JP-A-58-187968 describes a paste filling machine that has a built-in helical feed blade, or a screw in the sense of the present invention, but the structure shown here does not allow sufficient filling of the paste extruded by the screw. Since it is not possible to fill the lattice body with large pressure, a paste slicing mechanism is installed to use the extruded paste instead of filling the lattice body.
It uses a structure in which it is placed and sliced into a sheet-like paste.

Therefore, as shown in Fig. 3, studies have been conducted to increase the filling pressure using an improved paste filling machine for button storage batteries to obtain high quality electrode plates with small variations in the amount of paste filling. However, with this method, it is difficult to adjust the filling pressure, and because the filling pressure is high, the paste gradually becomes hard, making it difficult to operate the paste filling machine stably for a long time.

Means for Solving the Problems The present invention solves the above-mentioned conventional drawbacks and provides a paste filling machine for lead-acid batteries that has extremely small variations in paste filling amount and can operate stably for a long time. In a paste filling machine for lead-acid batteries, which is composed of a paste hopper and a cylindrical part provided at the bottom thereof, and a screw part formed along the inner periphery of the paste hopper, the inner periphery of the hopper and the outer periphery of the screw are used. The feature is that a certain gap is provided between the two.

Example Hereinafter, the present invention will be explained in detail based on examples.

FIG. 1 is a schematic view showing an embodiment of a paste filling machine according to the present invention, in which a paste hopper 3 is formed along the inner circumference of the paste hopper 3, which is made up of an inverted conical part 1 and a cylindrical part 2 provided below the inverted conical part 1. It is composed of a screw 4. The paste 5 introduced from the upper part of the paste hopper 3 is pushed toward the lower part of the hopper by the rotation of the screw 4.

The paste 5 is pushed in with greater pressure as it goes lower, and is extruded from the lower part of the cylindrical part 2 of the hopper 3. The extruded paste 5 is fed to a grid body 7 by a conveyor belt 6.
It is pressed and filled to form the electrode plate 8. In the case of the paste filling machine shown in FIG. 3, the paste popper 3 and the screw 4 are arranged so close that they do not touch each other, and the paste 5 pushed into the lower part of the paste hopper 3 by the screw 4 is Everything had to be carried out of the paste filling machine by a grid 7 fed by a conveyor belt 6. However, in the paste filling machine for lead-acid batteries according to the present invention shown in FIG. Among the excess paste that is filled in the grid body 7 and carried out to the outside of the paste filling machine, that is, the paste that is pushed to the bottom of the paste hopper 3 by the screw 4, the remaining paste that is not filled in the grid body 7 is stored in the gaps. Rise along 9. Although the filling pressure of the paste 5 into the grid body 7 is slightly reduced by this, it becomes easy to adjust the paste pushing amount and the paste filling amount.

Next, using this device, we conducted a trial production of a typical electrode plate for an automobile battery. Table 1 compares the variation in the filling amount with the conventional example when the target base 1 to filling amount is 100 (J) per electrode plate.

As is clear from the test results, according to the present invention, the variation in paste filling amount was reduced to about 173 or less compared to the conventional product, and the variation was reduced by 20% compared to the improved product. Further, in the improved product, after about 8 hours of continuous operation, the presence of partially hardened paste was observed at the bottom of the screw, indicating an abnormality due to long-term operation, but no such abnormality was observed in the product of the present invention.

Table 1 In this embodiment, a case is described in detail in which a gap is provided between the screw 4 and the inverted conical portion 1 and the cylindrical portion 2 of the paste hopper 3, but as shown in FIG. A similar effect was also observed in a paste filling machine in which a gap was provided only between the inverted conical portion 1 of No. 3 and the screw 4.

Effect of the invention.

As described above, according to the present invention, the filling pressure of the paste becomes large and stable, and the variation in the amount of paste filling can be extremely reduced, which is of great industrial value in terms of quality control of lead-acid batteries.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the paste filling machine for lead-acid batteries according to the present invention, FIG. 2 is a schematic diagram showing the main parts of another embodiment of the paste filling machine for button storage batteries according to the present invention, and FIG. FIG. 1 is a schematic diagram showing an improved paste filling machine for lead-acid batteries. 1... Inverted conical part of the hopper, 2... Cylindrical part of the pumper, 3... Hopper, 4... Screw 5...
・Paste, 6... Conveyor belt, 7... Grid, 8
...Polar plate, 9...Gap sweet 10 Bud λ1z 5°-Fushi 73 years Bar-

Claims (1)

[Claims] 1. In a paste filling machine for lead-acid batteries, which is composed of a paste hopper consisting of an inverted conical part and a cylindrical part provided at the bottom thereof, and a screw part formed along the inner periphery of the paste hopper, the inner periphery of the hopper is A paste filling machine for lead-acid batteries, characterized in that a certain gap is provided between the screw and the outer periphery of the screw.