JP3111775B2 - Equipment for casting grids for lead-acid batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for casting a lead-acid battery, and more particularly, to a casting apparatus for casting a grid body.
The present invention relates to an improvement in a ladle for pouring molten lead alloy.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional apparatus for casting a grid for a lead storage battery.

[0005] As shown in FIG. 5, a conventional lattice casting apparatus includes a ladle 1 that stores a fixed amount of a molten lead alloy and periodically inclines and pours the molten metal into a mold. 1 and a mold 2 provided with a lattice-forming groove for casting a lattice composed of the lead alloy.

Here, the ladle 1 is of a box type having an open upper part, and a pouring port 3 composed of a plurality of small holes is provided on one side thereof. Also, this pouring port 3
As shown in FIG. 6, during standby until the molten metal in the ladle is poured into the mold, the molten metal is always provided above the molten metal surface 4 of the molten metal stored in the ladle. Then, when pouring the molten metal from the ladle 1 into the mold, the ladle 1 is rotated and tilted about the rotation shafts 5 at both ends thereof, and the pouring port 3 is brought close to the upper surface of the mold 2 to perform the pouring. Is going.

That is, the ladle 1 is inclined at the time of pouring,
By setting the pouring port 3 of the ladle below the level 4 of the molten lead alloy in the ladle, the molten metal flows out of the pouring port.

When using a ladle without a pouring port on the side, the ladle is tilted and the molten metal is poured into the mold from the opening at the top of the ladle.

At this time, the amount of hot water to be stored in the ladle, the inclination angle of the ladle, and the time are set for pouring a fixed amount of the molten lead alloy into the mold.

[0008] Then, the molten metal of the lead alloy is poured from the ladle into the mold, and when the amount of the molten metal in the ladle is reduced to a predetermined minimum amount, the molten metal of the lead alloy is supplied into the ladle from the opening at the top of the ladle. .

[0009]

However, in the ladle having the above-mentioned structure, the surface of the molten metal of the lead alloy is oxidized while the molten metal of the lead alloy stays in the ladle, and the coating of the lead oxide serves as an upper scum. When the molten metal is poured from the ladle into the mold when it floats on the surface of the molten metal, the upper scum floating on the surface of the molten metal may flow into the mold together with the molten metal.

[0010] This is because the molten lead alloy in the ladle passes through the molten metal surface and is poured into the mold from the pouring port, so that the upper scum floating on the molten metal surface necessarily mixes with the molten metal poured into the mold. That's why.

[0011] When the upper slag enters the groove for forming the lattice of the mold, the upper slag is present in the groove, so that the flow of the molten metal in the groove may deteriorate. Then, the molten metal of the lead alloy was not sufficiently spread over the entire groove for forming the lattice, and a lattice having a part of the lattice was sometimes produced.

Further, since the mold 2 for casting the lattice body is formed by overlapping two molds obtained by vertically dividing the groove for forming the lattice body into two, the upper slag is sandwiched between the molds. In some cases, a gap was formed on the mold mating surface of the mold. When the gap is formed in the mold, the melt of the lead alloy poured into the mold flows from the groove for forming the lattice to the periphery thereof, and burrs are formed around the lattice, causing weight variation of the lattice.

If the weight of the grid body varies as described above, the amount of the active material filled in the grid body also varies. Therefore, in a lead-acid battery using such a grid body, the capacity and service life of the battery are reduced. The characteristics varied.

The present invention has been made to solve the above problems, and when a molten metal of a lead alloy is poured from a ladle into a mold to cast a lattice, a coating of lead oxide formed on the molten metal surface in the ladle is formed. The upper slag consisting of is prevented from entering the mold,
An object of the present invention is to provide an apparatus for casting a grid for a lead-acid battery, which is capable of producing a grid without partial loss of the grid or variation in weight.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lead-acid battery grid casting apparatus for storing a fixed amount of molten lead alloy and having rotating shafts provided at both ends thereof. And a ladle that periodically pours the molten metal from the pouring port into the mold, and when the amount of molten lead alloy in the ladle is reduced to a predetermined minimum amount by pouring into the mold, A supply pipe for supplying molten metal of the lead alloy into the ladle from below the surface of the molten metal, and a mold having a lattice body forming groove for casting a lattice body. A pouring spout is provided below the level of the predetermined minimum amount of molten metal in the ladle, and the pouring spout is separated from the pouring spout in conjunction with the inclination of the ladle. Is provided with a lid that opens from the closed state.

[0016]

In the lattice casting apparatus of the present invention, in a ladle for storing a molten lead alloy, a pouring spout for pouring the molten metal into a mold is provided.
It is provided below the surface of the molten metal when the amount of the molten metal is a predetermined minimum amount. Thereby, even if the level of the molten metal in the ladle is lowered by pouring, the level does not reach the pouring port. Since the molten metal of the lead alloy below the surface of the molten metal is poured during pouring, the upper slag consisting of the lead oxide film formed on the surface of the molten metal is prevented from flowing out of the pouring port and entering the mold. can do.

In addition, the amount of molten metal in the ladle is
When the molten metal is reduced to a predetermined minimum amount by pouring into a mold, a supply pipe is provided for supplying the molten lead alloy from below the surface of the minimum amount of molten metal.

Thus, when the molten metal of the lead alloy is supplied from the supply pipe to the ladle, it is possible to prevent the upper scum formed on the surface of the molten metal in the ladle from diffusing into the molten metal.

Therefore, the upper slag formed on the surface of the molten metal in the ladle is prevented from being mixed into the molten metal poured into the mold, and the upper slag is present in the mold when the lattice body is cast. Can be prevented, and the weight variation of the lattice body can be prevented.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an apparatus for casting a grid for a lead-acid battery according to the present invention, and FIG. 2 is a sectional view of a box-shaped ladle having an open upper part.

As shown in FIGS. 1 and 2, in the casting apparatus of the present invention, the amount of molten lead alloy in the ladle is reduced to a predetermined minimum amount by pouring into the mold 2 in the ladle. In this case, this is detected by a sensor, and a supply pipe 6 for newly supplying the molten metal of the lead alloy into the ladle is introduced from the opening above the ladle from below the molten metal surface 4 '. I have.

On one side surface of the ladle 1, there is provided a pouring port 3 composed of a plurality of small holes arranged in a straight line at a position below the molten metal surface 4 '. When the molten metal in the ladle is on standby until the molten metal in the ladle is poured into the mold, the rectangular parallelepiped lid 7 made of a steel square bar is used to prevent the molten metal in the ladle from leaking out of the ladle from the pouring port 3. All are closed.

At both ends of the lid 7, an interlocking shaft 8 for interlocking the lid 7 with the inclination of the ladle is mounted, and the other end of the interlocking shaft 8 is mounted on the outer surface of the ladle 1.

Then, as shown in FIG. 3, when the ladle 1 is inclined in the direction of the mold around the rotating shafts 5 provided at both ends of the ladle 1, the pouring port 3 is closed in conjunction with the inclination. The pouring lid 7 is separated from the pouring port 3, the pouring port 3 is opened, and the molten metal is poured from the ladle into the mold.

Next, using a predetermined lead-calcium-tin alloy, the lattice casting apparatus of the present invention shown in FIG.
2000 lattices of a predetermined size were cast. And
These were used as the lattice of the present invention.

Further, 2000 lattices of the same size as above were cast by the conventional lattice molding apparatus shown in FIG. 5, and these were used as conventional lattices.

At this time, the weight of each lattice was measured, and the variation in weight was examined. The result is shown in FIG.

As shown in FIG. 4, the grid of the present invention has almost no variation in weight, and a grid of a predetermined weight is continuously obtained. However, the conventional grid has large variation in weight. At the same time, there are cases where the weight of the lattice exceeds the allowable range of non-defective products, and the operation of the casting apparatus may be stopped.

In the casting apparatus for a lattice body according to the present invention,
The upper slag formed on the surface of the molten metal in the ladle as in the prior art is sandwiched between the mold mating surfaces to prevent the molten lead alloy from flowing into the mold other than the lattice-forming grooves of the mold. It is considered that this was because the increase in the weight was prevented.

[0031]

As described above, in the lattice casting apparatus according to the present invention, in the ladle for storing the molten lead alloy, when the pouring port for pouring the molten metal into the mold has a predetermined minimum amount of the molten metal. It is provided below the surface of the bath.

Further, in the ladle, when the amount of molten metal in the ladle is reduced to a predetermined minimum amount by pouring into the mold, a supply pipe for newly supplying molten metal of the lead alloy from below the molten metal surface. Is provided.

Therefore, it is possible to prevent the slag consisting of the lead oxide film formed on the surface of the molten metal from being mixed into the molten metal of the lead alloy poured from the ladle into the mold. Partial loss of the grid due to the presence in the mold and variation in the weight of the grid body can be prevented.

[Brief description of the drawings]

FIG. 1 is a view showing an apparatus for casting a grid body for a lead-acid battery according to the present invention.

FIG. 2 is a sectional view of a ladle part of the casting apparatus.

FIG. 3 is a view showing a state in which molten metal of a lead alloy is poured from a ladle to a mold in the casting apparatus.

FIG. 4 is a diagram showing a variation in weight of a lattice body during the production of a lattice body according to the present invention and a conventional one.

FIG. 5 is a view showing a conventional casting apparatus for a grid for a lead storage battery.

FIG. 6 is a sectional view of a ladle part of the casting apparatus.

[Explanation of symbols]

Reference Signs List 1 ladle 2 mold 3 mold pouring port 4 molten metal surface of lead alloy 4 'molten metal surface when the amount of molten metal in ladle is reduced to a predetermined minimum amount by pouring into mold 5 rotating shaft 6 supply pipe 7 lid 8 linked axes

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 25/04 H01M 4/84

Claims (4)

(57) [Claims] 1. A ladle for storing a fixed amount of a molten lead alloy, rotating and tilting about a rotation shaft provided at both ends, and periodically pouring the molten metal from a pouring port into a mold. When the amount of the molten lead alloy is reduced to a predetermined minimum amount by pouring into a mold, a supply pipe for supplying the molten lead alloy into the ladle from below the surface of the molten metal, and a lattice for casting the lattice body The ladle is provided with a pouring port for pouring molten lead alloy into the mold, the amount of the molten metal being provided below the surface of the predetermined minimum amount of molten metal on the ladle. A pouring device for a grid for a lead-acid battery, wherein the pouring port is provided with a lid that opens from the closed state away from the pouring port in conjunction with the inclination of the ladle. 2. The apparatus according to claim 1, wherein the ladle has a box shape with an open upper part, and a pouring hole including a plurality of small holes is provided on one side of the ladle. 3. A lid for opening and closing a pouring spout provided on a side surface of a box-shaped ladle is made of a metal plate or a square material, and is provided on the outside of the ladle. 2. An interlocking shaft for interlocking is provided.
An apparatus for casting a grid body for a lead storage battery according to the above. 4. A supply pipe for supplying the molten lead alloy into the ladle is introduced into the ladle from an opening at the top of the ladle, and the surface of the molten metal when the amount of the molten metal in the ladle is reduced to a predetermined minimum amount. 3. The apparatus according to claim 2, wherein the tip of the pipe is located at a lower position.