JPH0689717A - Electrode plate cutting method - Google Patents

Abstract

PURPOSE:To prevent production of whiskers or burrs at the cut surface and prolong the lifetime of a battery by allowing an upper cutter sinking to cut an electrode plate arranged between the upper cutter and a lower cutter, and hindering the upper cutter in upward stroke thereafter from touching the cut surface of the electrode plate and the lower cutter. CONSTITUTION:An upper cutter 1 is set in the vertical direction, and an electrode plate 2 is placed on a table 4. The upper cutter 1 is sunk while its inside 1a is pressed to the outside 3a of a lower cutter 3 using a cylinder 5, and thereby the electrode plate 2 is cut. When the upper cutter 1 has reached the undermost position, the upper cutter 1 is rotated by the cylinder 5 to run ahead of the lower cutter 3 so that the inside 1a of the upper cutter 1 does not contact the cut surface of the electrode plate 2 or the outside 3a of the lower cutter 3, and in this condition, the upper cutter 1 and cylinder 5 are elevated and returned to the original position. Accordingly no whiskers or burrs are generated of a nickel mat at the cut surface of the electrode plate 2. and troubles such as short-circuiting, etc., are suppressed after assembly of a battery. Thus the battery is equipped with a long lifetime.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a paste type electrode plate used in nickel cadmium batteries or the like into a predetermined size.

[0002]

2. Description of the Related Art FIG. 6 is an explanatory view showing a conventional method, in which 1 is an upper blade, 2 is an electrode plate, 3 is a lower blade, and 4 is a mounting base for the electrode plate 2. In the conventional method, as shown in FIG. 6, the electrode plate 2 is placed on the platform 4 integrated with the lower blade 3, the upper blade 1 is lowered, and the upper blade 1 and the lower blade 3 cross each other. Cut the electrode plate 2,
After that, the upper blade 1 was raised along the outer side surface 3a of the lower blade 3 and returned to the original state before cutting. Then, the cut electrode plate 2 was taken out from the mounting table 4 and sent to the next step.

[0003]

In the method described in the prior art, when the upper blade 1 rises along the outer surface 3a of the lower blade 3, the upper blade 1 comes into contact with the cut surface of the electrode plate 2. For example, in the case of a paste-type electrode plate obtained by applying a paste-like active material to a nickel mat and drying it, nickel mustaches, burrs, etc. are generated on the cut surface, and when assembled into a battery, the beards, burrs, etc. cause a positive electrode plate. There was a short circuit with the negative electrode plate.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cutting method in which the cut surface of a paste type electrode plate is free from beards, burrs and the like.

[0005]

In order to achieve the above object, the present invention arranges a polar plate 2 between an upper blade 1 and a lower blade 3,
The upper blade 1 descends to cut the electrode plate 2, and then the upper blade 1 ascends without coming into contact with the lower blade 3 and the cutting surface 2a of the electrode plate 2. .

[0006]

[Operation] Since the upper blade 1 does not come into contact with the cut surface 2a of the electrode plate 2 when it rises, no beard or burr is generated on the cut surface 2a.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 to 4 are explanatory views showing a cutting process according to the present invention, and 1 to 4 correspond to those described in the conventional art. 5 is a cylinder for rotating the upper blade 1. Figure 5
Is a schematic front view of the cutting device on which the electrode plate is placed in the step of FIG. 1, 1a is a guide blade, and when the upper blade 1 is lowered,
The entire upper blade 1 is in contact with the lower blade 3 and positioned so as to reliably cut the electrode plate.

First, as shown in FIG. 1, the upper blade 1 is set in the vertical direction, and the electrode plate 2 is placed on the mounting table 4. At this time, the cut portion of the electrode plate 2 is positioned above the outer surface 3a of the lower blade 3 attached to one end of the mounting table 4. Next, as shown in FIG. 2, the inner surface 1 of the upper blade 1 is moved by the cylinder 5.
The upper blade 1 is lowered while pressing a on the outer surface 3a of the lower blade 3 to cut the electrode plate 2.

Next, as shown in FIG. 3, when the upper blade 1 reaches the lowest position, the upper blade 1 is rotated by the cylinder 5 to be released to the front of the lower blade 3 (to the left in FIG. 3). The inner side surface 1a of 1 does not contact the cutting surface 2a of the electrode plate 2 and the outer side surface 3a of the lower blade 3. In this state, the upper blade 1 and the cylinder 5 are raised as shown in FIG. 4, and are returned to the positions of the upper blade 1 and the cylinder 5 in the process of FIG.

[0010]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, after cutting the electrode plate, no whiskers, burrs or the like are generated on the cut surface of the electrode plate, so that short circuit failure does not occur after battery assembly and life performance is improved. An excellent battery can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a process of the present invention before cutting an electrode plate.

FIG. 2 is an explanatory view showing a process of the present invention during cutting of the electrode plate.

FIG. 3 is an explanatory view showing a process of the present invention immediately after cutting the electrode plate.

FIG. 4 is an explanatory view showing a process of the present invention while the upper blade is rising.

5 is a front view of FIG. 1. FIG.

FIG. 6 is an explanatory diagram showing a conventional method.

[Explanation of symbols]

 1 Upper blade 2 Electrode 2a Electrode cutting surface 3 Lower blade

Claims (1)

[Claims] 1. An electrode plate (2) is arranged between an upper blade (1) and a lower blade (3), and then the upper blade (1) descends to cut the electrode plate (2). Then, the upper blade (1) is raised without coming into contact with the lower blade (3) and the cutting surface (2a) of the electrode plate (2), a method for cutting an electrode plate.