JPH0498762A - Manufacture of substrate for lead-acid battery - Google Patents

Abstract

PURPOSE:To avoid the concentration of a lead amount or a heating value, and quicken a casting speed for a substrate by casting the substrate in such a way as to ensure each diagonal crosspiece to pass the intersection of the concerned vertical and horizontal crosspieces at all times. CONSTITUTION:An outer enclosure frame 1 having a lug 2 externally projected as an integral part thereof, and space within the frame 1 are made to have many parallel vertical and horizontal cross-pieces 4 and 5 so cast as to cellularize many holes 3 for filling an active material. In addition, a plurality of diagonal cross-pieces 6 radially extended from a crosspiece section 1a having the lug 2 of the concerned enclosure frame 1 are so cast as to pass the intersection 7 of the concerned vertical and horizontal cross-pieces 4 and 5 at all times for enhancing power collection efficiency, thereby obtaining a lead cast substrate. According to the aforesaid construction, a lead amount is remarkably reduced at the intersection 8 where the three crosspieces 4, 5 and 6 cross one another, compared with the same triangular section of a conventional construction, and the concentration of a heating value at the concerned section 8 can be avoided during a casting process.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for casting a substrate for a lead-acid battery.

[Conventional technology]

As a conventional lead-acid battery board, the one shown in FIG. 3 is known. That is, the substrate includes a rectangular outer peripheral frame B having ears A, and a large number of vertical bars C and horizontal bars that intersect to form a space within the outer peripheral frame B into a large number of active material filling holes. In addition, in order to enhance the current collection effect to the ears, a lead-acid battery substrate consisting of a plurality of diagonal crosspieces E arranged radially from the frame part of the outer peripheral frame B where the ears A exist is cast. It is publicly known.

=Problem to be Solved by the Invention] However, in the casting of the conventional lead-acid battery board described above, each of the diagonal bars E is simply cast in a straight line that diagonally crosses the vertical bars C and the horizontal bars. It often passes near the intersection F of the vertical bar C and the horizontal bar, and intersects the vertical bar C and the horizontal bar. In FIG. 3, such parts are shown circled.

Therefore, as shown in the enlarged view in Figure 4, in actual casting of this board, lead metal is formed in the part where the diagonal crosspiece E intersects with the vertical crosspiece and the part where it intersects with the horizontal crosspiece. In addition, the space at the center of the triangle formed by the diagonal crosspiece E and the vertical and horizontal crosspieces C and D is filled with molten lead, forming a thick portion F' of the triangle where the amount of lead increases accordingly. Therefore, since the heat is concentrated in this area, it becomes a problem on the hot side i-1 during casting.Therefore, the force that forces the casting speed to be slowed down, and the production efficiency decreases. The area will solidify more slowly, so if it is hit by a shock before it has fully solidified,
It has disadvantages such as cracking, resulting in defective products.

Means for Solving the Problems] The present invention provides a board for a lead-acid battery that eliminates the above-mentioned conventional disadvantages and has good production efficiency. In order to divide the space into a large number of holes for filling the active material, there are a number of vertical bars, horizontal bars, and a plurality of diagonal bars arranged radially from the edged frame of the outer peripheral frame. In the method of casting a storage battery board, each diagonal bar is left in an S shape so as to pass through the intersection of the vertical bar and the horizontal bar.

7. Effect] According to the present invention, each of the diagonal bars arranged radially is arranged so that its entire length always passes through the intersection of the vertical bar and the horizontal bar. The generation of thick, triangular intersection points is prevented, the amount of lead in the area is reduced, and the concentration of heat can be suppressed. Therefore, casting can be performed without reducing the casting speed, improving production efficiency, and A button casting board with excellent current collecting effect can be obtained.

[Embodiment] Next, an example of the implementation of the present invention will be explained based on the attached drawings. 6 Fig. 1 shows an example of a lead cast substrate for a button storage battery cast according to the present invention. Using a casting mold (not shown) for a lead-acid battery substrate in which the method is carried out, an outer peripheral frame 1 and a space inside the surrounding frame 1, in which the ears 2 shown in the first figure are integrally projected outward, are formed. In addition to casting a large number of parallel vertical bars 4 and a large number of parallel horizontal bars 5 to define a large number of active material filling holes 3, in addition to this, in order to improve current collection efficiency, A plurality of diagonal bars 6 are arranged radially from the bar portion 1a having the ears 2 of the outer peripheral frame 1. The button fJ3 base plate of the present invention is obtained by casting so as to pass through the button.

Furthermore, to explain this in detail, in the example shown in the first figure, the diagonal crosspiece 6
The number of these is four, and these extend radially from the upper frame part 1a where the outer peripheral frame 1 y > ear 2 is located, the other two extend to the left side frame part 1b of the outer peripheral frame 1, and the other one is the lower frame part 1d
In the second case, each of the diagonal bars 6 is connected to each horizontal bar 5 that intersects with each of the plurality of vertical bars 4. Make sure to pass through each intersection 7. That is, the adjacent intersection points 77 of each phase are connected.

Thus, each diagonal crosspiece 6 connects its respective intersection points 7 and 7, and each diagonal crosspiece 6a connecting between the frame portion of the outer peripheral frame 1 and the intersection point 7,
The slopes are different from each other, and when viewed as the full length of the diagonal crosspiece 6, it generally becomes a bent line.

Each of the intersection points 7 is shown surrounded by a circle in FIG. 1, but
Each said intersection point 7 is 1a as shown enlarged in FIG.
Since the diagonal crosspiece 6 is constructed so as to pass through the intersection point 7 between the crosspiece 4 and the horizontal crosspiece, it is possible to create a button with a thick wall and a triangular area as shown in FIG. No cast parts are generated. Thus, in other words, the intersection point 8 where the three crosspieces 4, 5, and 6 intersect has j) a significantly reduced amount compared to the conventional triangular portion, and the amount of heat at the point 8 during casting is reduced. Therefore, there is no need to slow down the casting speed, which improves productivity. Also, since the area solidifies easily and quickly, damage caused by impact can be avoided.
``Cracks are eliminated and high-quality boards can be obtained. In the embodiment, it is preferable that the vertical beams 4 directly below the ears be cast relatively thick.

〔Effect of the invention〕

As described above, the present invention has an outer peripheral frame having ears, a large number of vertical bars and horizontal bars, and ears of the outer peripheral frame to divide the inside of the outer peripheral frame into a plurality of active material filling directions. In a method for casting a lead-acid battery board consisting of a plurality of diagonal bars arranged radially from a frame, each diagonal bar is cast so that it always passes through the intersection of the vertical bar and the horizontal bar, The amount of lead at the intersection point is reduced, and the concentration of lead amount, that is, the concentration of heat amount, can be avoided. Therefore, the casting speed can be increased without reducing the casting speed, and there is no casting loss, and productivity can be improved. This has the effect of making it possible to manufacture a high-performance lead-acid battery substrate.

[Brief explanation of drawings]

FIG. 1 is a plan view of a lead-acid battery board according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main parts, FIG. The figure shows an enlarged view of a part of it 6 1... Outer peripheral frame 2... Ear 3... Active material filling hole 4... Vertical bar 5... Horizontal bar
6... Diagonal crosspiece 7... Intersection 8
...Intersection of three crosspieces Figure 1 Figure 2

Claims (1)

[Claims] 1. It has a rectangular peripheral frame with ears, a large number of vertical bars and horizontal bars that intersect to form a plurality of active material filling holes in the space within the peripheral frame, and ears of the peripheral frame. A method for casting a lead-acid battery board consisting of a plurality of diagonal bars arranged radially from a frame, in which each diagonal bar is cast so that it always passes through the intersection of the vertical bar and the horizontal bar. Casting method for lead-acid battery substrates.