JPH0145711B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing electrode plates for lead-acid batteries.

Conventional technology and its problems In general, electrode plates for lead-acid batteries are manufactured by filling a paste-like active substance into a lattice body made of lead or lead alloy and consisting of a main rib with current collecting ears and a lattice. There is. Most of the grid bodies used in this type of electrode plate are manufactured by casting. Recently, lead or lead alloy elongated materials obtained by rolling or the like are also manufactured by punching or expanding.

Among these, manufacturing by casting requires skilled work in a hot environment, has poor productivity, and is extremely difficult to manufacture in the thin shape necessary for high-performance batteries. In addition, manufacturing by punching produces a large amount of punching waste from the long material, which requires a great deal of effort and expense to recover and recycle, resulting in loss of the long material.

On the other hand, manufacturing by expanding processing involves shearing a long material using the known guillotine shearing method and simultaneously expanding it to form a lattice part, or forming staggered cuts in the long material using a rotary cutter, and There are expansion processing methods, in which the continuous lattice parts formed in this way are filled with a paste-like active substance, and then cut into predetermined external dimensions. It has great advantages in that it has a high yield rate and can be made thinner and lighter.

However, in manufacturing by conventional expanding processing, a cast long material of lead or lead alloy with a thickness of about 20 mm obtained using a vertical or horizontal fixed mold or a continuous casting machine such as Hazelett is usually cast with a rolling roller. By rolling it for about 10 baths, it has a predetermined thickness of 10% or less of the cast long material, and when used as a grid for anode plates, it takes on a uniform corroded shape, which is advantageous for battery life. A method has been adopted in which a long material having a so-called fibrous rolling structure is obtained, the rolled elongated material is once rolled up, and then sent to the next step, an expanding process.

This is done by using a continuous casting machine like the one mentioned above.
This is because it is extremely difficult to obtain long materials of lead or lead alloys of about 10 mm or less, and because the continuous casting machines produce long materials at relatively high speeds, the operating speed of the expanding processing equipment is limited. This is because it does not match. In this way, manufacturing by conventional expanding processing not only requires expensive rolling roller equipment, but also complicates the manufacturing process for the electrode plates.As a result, the productivity of the electrode plates is low despite the high equipment costs. The problem was that it did not improve.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a lead-acid battery electrode plate that is inexpensive and has good productivity.

Structure of the Invention In order to achieve the above-mentioned object, the present invention involves a steel belt being brought into contact with a rotating roll having a groove in the center of the outer peripheral surface, and a molten mainly calcium-based material injected between the groove of the roll and the steel belt. A long material of lead or lead alloy having a thickness of about 7 to 3 mm is continuously cast by cooling and solidifying the lead or lead alloy in the grooves of the rolls, and then rolling the lead or lead alloy with 1 to 4 sets of rolling rollers. The long material is rolled to have a predetermined thickness within the range of 2.0 to 0.5 mm by passing through a rolled length material,
Subsequently, the rolled elongated material is directly expanded leaving at least a solid portion to form the upper rib of the electrode plate and the current collecting ears, and a lattice of the continuous lattice material obtained thereby. This method is characterized in that the electrode plate is filled with a paste-like active substance and then cut into predetermined external dimensions.

Embodiment Hereinafter, the present invention will be described in detail with reference to FIG. 1, which is a schematic side view of a manufacturing plant for lead-acid battery electrode plates in one embodiment.

In FIG. 1, a is a casting process for a long material made of lead or a lead alloy. 1 is a rotating roll driven by a speed-adjustable electric motor, on which grooves for forming a long material are continuously engraved. 2 is a steel belt; 3 is a first auxiliary roll adjacent to the rotating roll 1 and in contact with molten lead or lead alloy via the steel belt 2; S against
It is laid out in a letter shape. 4 is a second auxiliary roll equipped with a tension adjustment/holding device for adjusting and keeping the tension of the steel belt 2 constant, and 5 is a third auxiliary roll. The molten lead or lead alloy flowing out from the pouring section 6 is placed in a groove in the center of the outer circumferential surface of the rotary roll 1, the surface of which has been heated in advance by a heating device 7, and a steel whose surface is kept at a constant temperature by a heating device 8. The elongated material 10 flows into a continuous mold formed by the belt 2 and is cooled by the cooling device 9.
It is taken out as a raw material and sent to the next rolling process by a feed roll 11.

b indicates a rolling process using 1 to 4 rolling roller groups. A long material 10 having a thickness of about 7 to 3 mm obtained in the continuous casting process is rolled by 50% or more with the first rolling roller 12, and then rolled by the second to third rolling rollers 13 to 2.0 to 0.5 mm. A rolled elongated material 14 having a predetermined thickness within the range of .

c indicates an expanding process. That is, 15 is a rotary cutter with a blade, and the rolled length material 1
Staggered cuts parallel to the direction of movement are formed in 4, leaving the band-shaped solid parts at both ends, the upper rib of the electrode plate, and the central solid part where the current collecting ears are to be formed. 16 is a running chain having, for example, unevenness that engages with each other at the top and bottom, and is run while holding the central solid part on the center line, and at the same time holds the solid parts at both ends and extends it in the lateral direction while running this, The parallel zigzag cuts are expanded to form a lattice section, and a rotary cutter 17 is used to cut out unnecessary portions of the solid portion at both ends of the band. Thereafter, the lattice portion is pressed by a thickness adjusting roller 18 to make the thickness of the lattice portion constant. 19 shows the expanded lattice body obtained in this way. In this embodiment, an expanding apparatus using a rotary cutter is used as an example of the expanding process, but it is of course possible to use an expanding apparatus using other methods such as a guillotine shearing method instead.

d shows the filling process using tissue paper. That is, a thin paper 20 is supplied to the underside of the expanded grid body 19, and then the expanded grid body 19 is filled with a paste-like active substance in a spreader 21. Subsequently, the thin paper 22 is supplied on the upper side. 23 shows the long electrode plate thus obtained.

e indicates a cutting step in which the long electrode plate 23 is cut into predetermined external dimensions. That is, a rotary cutter is used to cut and remove a part of the central solid part of the elongated electrode plate 23, and to form a cut electrode plate material 25 having ears and upper and lower ribs. In addition, a swing-type cutter may be used as the cutting device.

f indicates a drying step, in which the cut electrode plate material 25 is dried in a drying device 26 to become a dried electrode plate material 27.
Note that the cutting step e and the drying step f, that is, the order of the cutting device 24 and the drying device 26 can be reversed.

g is an alignment step for aligning the dry electrode plates thus obtained, and 28 is an alignment device.

When the present inventor wants to obtain a long material having a thickness of about 2.0 to 0.5 mm, the thickness of the first obtained long material is about 7 to 3 mm, and this is rolled by the first set of rolling rollers. , rolled to 1/2 or less, then 1
~ By rolling it to a predetermined thickness of about 1/3 or less with three sets of rolling rollers, it shows a nearly uniform corrosion shape even when used as a grid for anode plates, and there is no problem in practical use. It has been found that it is possible to obtain a long material having a structure close to that of a fibrous rolled structure. Furthermore, we prototyped a lead-acid battery using a lattice body obtained by expanding the elongated material obtained in this way, and conducted a comparative test with a lead-acid battery using conventional elongated material. We confirmed that there was no difference.

Next, the present inventor focused on the roll-belt method, which is capable of producing long lead or lead alloy materials with a thickness of about 7 to 3 mm and is suitable for small-scale production, and succeeded in putting it into practical use. did. This method not only enables continuous casting of relatively thin lead or lead alloy long materials, but also allows for the following: It is possible to directly connect the rolling process to the expanding process, etc. In this case, an appropriate scale device can be obtained, and the equipment cost is much lower than that of conventional devices. In addition, since this method rolls a thinner cast sheet than conventional methods, it requires 1 to 4 sets of rolling rollers, usually 2 to 3 sets, to achieve the desired thickness, whereas conventionally about 10 sets were required. The equipment cost for expensive rolling rollers can be reduced by half or less. Furthermore, it is possible to directly connect each process such as casting process→rolling process→expanding process, and there is no complication in the manufacturing process such as once rolling up the rolled length material, so the productivity is also improved.

Effects of the Invention As described above, the present invention can provide a lead-acid battery electrode plate that is inexpensive and has good productivity, so its industrial value is extremely large.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a plant for producing electrode plates for lead-acid batteries according to an embodiment of the present invention. a... Casting process, b... Rolling process, c... Expanding process, d... Filling process, e... Cutting process, f... Drying process, g... Aligning process, 1... Rotating roll, 10... ... Long material, 12, 13 ... Rolling roller, 14 ... Rolled elongated material, 19 ... Expanded lattice body, 23 ... Long electrode plate.

Claims (1)

[Claims] 1. A device is prepared in which a rotating roll 1 and a steel belt 2 are brought into contact with the rotating roll 1, and the rotating roll 1 has a groove in the center of its outer peripheral surface, and the groove of the roll 1 and the steel belt Molten lead or lead alloy is injected between the belt 2 and cooled and solidified to form a long material 10. Next, the long material 10 is passed between several sets of rolling rollers 1.
2 and 13 and rolled to a predetermined thickness within the range of 2.0 to 0.5 mm to form a rolled elongated material 14. Next, the rolled elongated material 14 is expanded to form a long expanded material. A grid body 19 is formed, then the grid body 19 is filled with a paste-like active substance to form a long electrode plate 23, and then the long electrode plate 23 is cut to obtain an electrode plate. A method for manufacturing a lead-acid battery electrode plate using an expanded lattice body, characterized in that: