JPS59127370A - Manufacture of carbon zinc combined electrode for laminated dry buttery - Google Patents

Abstract

PURPOSE:To reduce the generation rate of scraps by improving the arrangement of punching dies. CONSTITUTION:After an original plate 10 for carbon zinc combined electrodes is positioned between guides 20 and 20, its end is located under punching dies 22 and 22 of the first group and the first punching work is carried out by driving a punching machine. Then the next punching work is carried out after the plate 10 is slidden by y which is the length of the shorter side of an electrode 12. In such a manner as above, the first three times of punching work of electrodes 12 are carried out only with the punching dies 22 and 22 of the first group. Next, after the plate 10 is again slidden by a given length, the area of the plate 10 which is left unpunched is punched with punching dies 24, 24 and 24 of the second group, thereby obtaining electrodes 12 of the same shape. Scraps 14 remaining after punching the electrodes 12 in such a manner as above are comprised of only areas left unpunched in order to make the corners of the electrodes 12 round. As a result triangular or star-like very small areas only remain after punching the electrodes 12 from the plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a carbon-zinc bonded electrode for a laminated dry battery.

In a stacked dry battery, carbon as a conductive layer and zinc as a negative electrode are laminated for each unit cell in order to bring the positive electrode and negative electrode into direct contact between the stacked unit cells. So-called carbon-zinc bonded electrodes are used. This carbon-zinc bonded electrode is formed into a rectangular shape to match the planar shape of the unit cell, and also prevents the heat-shrinkable tube from tearing when the laminate of the blue dens is bound and wrapped with hot acid fl and dupe. It is common practice to round the corners of the carbon-zinc bonded electrode.The method for manufacturing this carbon-zinc bonded electrode is to first make a large plate-shaped carbon-zinc bonded electrode, as shown in the conventional example in Figure 1a. An electrode original plate 10 is made, and a rectangular carbon-zinc bonded electrode 12 for laminated dry batteries with rounded corners is made from this original plate 10 using an n-cutting die.
It was done by punching out.

In this case, the punching dies for punching cannot be punched unless they are arranged at intervals of d5 from each other. However, for this purpose, from the original plate 10 to the electrode 12
After punching out, a grid-like scrap 14 remains. This scrap 14 is a loss of material, and how to reduce this loss has been a matter of great concern to those skilled in the art.

Therefore, various attempts have been made in the past to reduce (1) (1) loss as much as possible, that is, to reduce the area ratio of the scrap 14 as much as possible.

Figure 1 (1) shows a conventional example designed to reduce IQ loss. In the method shown in FIG.
(By cutting 117i along the intersecting dotted lines, the generation of scrap 14 is restricted to the through hole 16. According to this, the generation rate of scrap 14 is certainly significantly reduced. However,
As shown in Figure 74S1, the electrode 12 cut out in this way does not have rounded corners, but rather has edge-shaped corners, and for this reason, it was constructed using this. When unit cells are stacked and the stack is wrapped and bound with a heat-shrinkable tube, a problem arises in that the heat-shrinkable tube is easily torn at its edges. In the past, various attempts have been made to change the shape of the through hole 16, but it has been difficult to completely eliminate the above-mentioned edge portion.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to reduce the scrap generation rate as much as possible and to efficiently manufacture electrodes. The shape of the electrode can be a rectangle with rounded corners, and a unit cell constructed using the electrode is laminated on this, and this laminate is wrapped in a heat-shrinkable tube. - The heat-shrinkable tube can be reliably prevented from tearing when it is wrapped and tied, and it can be manufactured using a rough punching die, so it is suitable for mass production and has excellent non-pull properties. An object of the present invention is to provide a method for manufacturing carbon-zinc bonded electrodes for use in carbon-zinc bonded electrodes.

”In order to achieve the above objective 1-1, this invention first aims at carbon III! A rectangular carbon-zinc bonded electrode for laminated dry batteries with rounded corners is punched out from a lead-bonded electrode blank.
i! A first punching die is used to punch out an electrode of a predetermined shape along the width direction perpendicular to the feed direction of the original plate, and a second die is used to punch out an electrode of a predetermined shape along the width direction perpendicular to the feeding direction of the original plate. The process of punching out the remaining parts using a punching die is performed. Furthermore, the width of the portion left after the first punching die corresponds to the length of one of the electrodes, and the distance between the first and second punching dies is equal to the length of the other electrode. The punching dies are arranged so as to correspond to the length of the punching die.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each figure, common or corresponding parts are indicated using the same reference numerals.

FIG. 2 shows a punching machine 1 used for carrying out the method of the present invention.
The arrangement of eight punching dies 22, 22 and 24, 24.24 is shown. Moreover, FIGS. 3 to 8 show one embodiment of a method for manufacturing a carbon-zinc bonded electrode for a laminated dry battery using the punching machine 18 in order.

First, in FIG. 2, the punching machine 18 has a plurality of 11υ punching dies 22, 22, 24, 24.24. These plurality of punching dies 22, 22, 24, 24.24 are arranged in a first group and a second group. The J'J cutting dies 22, 22 and 24, 24, 24 between the groups are arranged alternately. In addition, the punching die 2 of both groups
In this example, there is a gap between 2, 22 and 24.24° 24, which corresponds to the length of two electrodes. Each punching die 22.22, 24, 24.24 is held in such a way that it can be operated simultaneously and performs a punching operation. In other words, in one punching operation, the area enclosed by diagonal lines/V in FIG. 2 is punched out all at once.

Next, an n-cutting machine like the one shown in Figure 2? The process of punching out the C electrode 12 using the C electrode 12 will be explained in order with reference to FIGS. 3 and 8.

As shown in FIG. 3, a carbon-zinc bonded electrode original plate 10
is positioned between the kites 20, 20, and the tip of each is positioned below the first group of punching dies 22, 22. After that, the punching machine described above is operated, and the first Perform the punching operation. As a result, the size J shown in Figure 3:
The original plate 10 is punched out at two locations at its tip, and a carbon-zinc bonded electrode 12 for a laminated dry battery is punched out at each location. The electrode 12 punched in this manner has a rectangular shape with rounded corners, similar to the U-shape formed by the punching dies 22, 22 shown in FIG. After this, original plate 10
is sent out by the length y of the other electrode 12 (), and the next punching operation begins again. At this time, new positioning of the original plate 10 is performed after punching out the electrode 12, with the new cut surfaces 28 and 28 being IJQl. Specifically, part 9) j L-cut IJi surface 28.28
A stopper (not shown) for positioning is placed facing the
Move the original plate 10 to the position where it touches the new cut surface 28°28 or the flange)'! 5. It's Zuno. In this way, the original plate 10 is determined! fl (y) (Once the plate is fed out, the punching operation is performed again. As a result, the part that continues after being punched out is punched out again, and an electrode 12 of the same shape is obtained from that part. As roughly shown in FIG. 5, the electrode 12 is subsequently punched out using the punching dies 22 of the first group described above.

In this way, for the first three times, the electrode 12 was removed using only the first group's first group of metal removal dies 22, 22.
e＞Neru.

After that, the original sheet 10 is roughly sent out by a predetermined amount J, so that the portion left by the punching dies 22, 22 of the first group is positioned below the punching dies 24, 24, 24 of the second group. become. Therefore, if a punching operation is performed here,
As shown in FIG. 6, the remaining portions are punched out by the second group of punching dies 24, 24, 24, so that 1q of electrodes 12 having the same shape can be obtained respectively. Thereafter, as shown in FIG. 7.8, the feeding of the original plate 10 and the punching operation by the punching machine 18 are performed alternately, so that in this embodiment, five sheets are punched in each punching operation. Electrodes 12 of the same shape are punched out in the same direction.

As described above, the electrodes 12 are punched out one after another from the original plate 10, but in this case, care must be taken to ensure that the portions left blank by the punching dies 22, 22 of the first group are 26 corresponds to the length x of one of the electrodes 12, and the punching die 22 of the first and second groups
, 22, 22, 24, 24.24 spacing, e is the above type 4
Each punching die 22 has a length corresponding to the length y of the other side of ji12.
- ~24 should be arranged in an array υ. As a result, the scrap 14 remaining after removing the electrode 12 is the 6171st. As shown in Figures 7 and 8, respectively,
This is an unnecessary 4T part because the corners of the electrode 12 are rounded (
It is a triangular or star-shaped extreme - C small part (P is left. Therefore, the generation rate of scrap 14 is very low, and the original plate 10 is mostly
+AL + J used for 2: Unaru. Moreover, part 7) J: The electrode 12 punched out from sea urchin C has a rectangular shape with rounded corners.
There is. For this reason, Jl constructed using these electrodes 12
, and then heat-shrink the laminate to cover and bind it. b1 The heat-shrinkable tube
・There is no fear that corner C of 12 will be torn.

Then, the first electrode 12 is connected to a plurality of
Since four pieces can be operated at the same time to punch out, the production efficiency is extremely high, and the machine has excellent aptitude for cutting legs.

Now, referring to a further preferred embodiment, the above-mentioned first,
The second group of punching dies 22 to 24 are arranged in plural numbers in the width direction of the original plate 10, respectively, and the second group of punching dies 24, 24. The length y2 is made to be slightly longer (d) than the width W of the portion 26 left blank by the punching dies 22, 22 of the group with knee distribution 1. As a result, it is possible to reliably eliminate the occurrence of linear uncut edges or cracks that occur in the gaps between the first group of punching dies 22, 22 and the second group of punching dies 24, 24. can.

Further, as described above, if the feeding position of the original plate 10 is determined by setting the new 1.7J cross section 28 after being punched by the first or second punching die 22 to 24, A new dimensional standard is set for each stroke, which prevents the accumulation of dimensional errors and prevents the accumulation of dimensional errors.
It is important to obtain the electrode 12 with a small deviation from the original plate 1.
This prevents the size from being too large or too short at the rearmost end of 0.

According to the method for manufacturing carbon-zinc bonded electrodes for laminated dry batteries according to the above-mentioned method of the present invention, scrap can be made into extremely small square or W-shaped pieces, thereby significantly reducing losses. It is possible to increase the utilization efficiency of the board by reducing (j;
63 can be made into a rectangular shape with rounded corners. C1 unit cells constructed using this are stacked, and this (11
When the layered body is wrapped and bound with a heat-shrinkable tube, there is no risk of the heat-shrinkable tube being torn at the corners of the electrode, and moreover, the ¥J manufacturing method requires multiple 4J cutting dies. Since it is possible to obtain electric power 11i for each punching die by simultaneously operating the dies, it is possible to obtain electric current 11i for each punching die.

711 Drawings D', i A and I A are top views showing examples of conventional manufacturing methods, respectively, and Fig. 2 is a punching machine used in the method of this invention. Figures 3 to 8 are J plan views showing the arrangement of the punching dies in the order of steps, and Figs.

10...... Original plate 12... Electrode 14... Scrap 16...) Δ hole 18... ..... Punching machine 20 ..... Kite 22 ..... First punching die 24 ..... Second punching die 26 ......Unfinished part 28...
・・・・・・New cutting surface A・・・・・・Feeding direction of original plate X, Y・・・・・・Electrode dimension W・・・・・・Remaining part width (...
...The distance between the first and second punching dies (11th I fG)! 4 Ward 1; b 2 i1', 1 C1-131'1 Sea lion* Figure 4・Na 5 (2I Do-x-=→ ・)li 7) 71

Claims (1)

[Scope of Claims] (1) In a manufacturing method obtained by punching a rectangular carbon-zinc bonded electrode for laminated dry batteries with rounded corners from a carbon-zinc bonded electrode original plate, an electrode of a predetermined shape is cut into a first punching die. Along the width direction perpendicular to the feeding direction of the original plate, the culm is punched out in one row, and the part left unpierced by the first punching die is punched out by the second punching die. conduct,
Furthermore, the width of the portion left blank by the first punching die corresponds to the length of one of the electrodes, and the first
The spacing between the second punching dies is an integer equal to the length of the other electrode.
1 (2) Patent 11'1 Claim (2) Patent 11'1 Claim: In the method of 1), each of the first and second punching dies is arranged in a plurality of 112.1'J' in the width direction of the original plate, and the second punching die has a length of 112.1'J' in the width direction of the punched shape. However, the above 1st 4]
A charcoal purple for laminated dry batteries that is slightly longer than the width of the part left blank by the cutting die! Method for manufacturing a 11I lead-bonded electrode. (3) d3 in the method of claim (1) or (2)
A method for producing a carbon-zinc bonded electrode for a laminated dry battery, characterized in that the feeding position of the original plate is determined based on a new cut surface after being punched by the first or second punching die.