JPS5926595Y2 - Metal foil cutter for capacitor element winding machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutter for metal foil for capacitor electrodes that is supplied as a roll when winding a capacitor element.

In capacitors to which high voltage is applied, if the end of the electrode wrapped in insulating material is cut at right angles to the longitudinal direction of the electrode at the beginning or end of winding of the capacitor element, corona phenomenon may occur. This tendency is particularly large when at least a portion of the dielectric material has a plastic film. Conventionally, as shown in Fig. 1A, after cutting in the longitudinal direction, the corner portions are cut along the dotted lines. It was bent inward in a triangular shape to alleviate the electric field.

However, this kind of bending is done manually,
When winding a wide element, it was necessary to work from both ends of the cut metal foil.

However, there is no need to bend anything to create a corner with a missing corner; instead, the corner can be formed by cutting.

The present invention eliminates the conventional manual work by easily cutting the foil in a direction perpendicular to the longitudinal direction (hereinafter referred to as the "transverse direction") of the metal foil using a corner cutter and later tensioning to form a corner. , relates to a metal foil cutter having a perforation blade for forming perforations between both corner cutters.

The cut metal foil is shown in FIG. 1B.

The present invention will be described below according to embodiments shown in the drawings.

FIG. 2 is an overall view of an example of the present invention, but some details will be explained in other drawings.

1 is a frame that supports the entire cutter, etc., and corner cutter lower molds 11 are placed on both sides of the crossbeam. A perforation lower mold 9 is supported in the middle, and a vertical operating rod 7 that vertically moves up and down laterally is supported, and a mounting method 8 that is passed horizontally to the operating rod 7 corresponds to the corner cutter lower mold 11° and perforation lower mold 9. Two corner cutter upper molds 12 and perforation blades 10 are attached.

An eccentric pin 4 is attached to the power transmission shaft 3 of the drive device 2,
The eccentric pin 4 is locked to both ends of a connecting rod 5, and the other end of the connecting rod 5 is locked to the lower end of the vertical operating rod 7 by a joint pin 6.

The rotational force is transmitted to the eccentric pins 4 on both sides by the biasing force of the drive device 2, and the operating rod 7 is moved in accordance with the vertical movement of the connecting rod 5.
moves up and down without tilting.

In the figure, the corner cutter upper mold 12.12 is in the open position, but starts in the position shown and lowers the metal foil 12.
The cutting machine is designed to make the date and stop again at the position shown.

The cut debris enters the debris receptacle 13.

FIG. 3 shows a part of the embodiment, and is a view of only the corner cutter upper mold 12 seen from the top.
The figure is a side view showing a partially cut surface of a portion of the corner cutter.

A corner cutter upper die 12, 12, perforation blade 10, etc. are attached to the lower side of the base 20 fixed to the mounting girder 8.

The corner cutter upper mold 12 is designed so that the cutting edge part that makes the deepest cut into the metal foil 14 is the highest,
The shape of the cutting blade is matched to the shape of the metal foil to be cut, and in this embodiment, it is shown as a corner cutter upper die 12 that cuts at right angles.

The press plate 15 is fixed to a guide rod 18, the other end of the guide rod 18 is slidably held by an upper stand 20, and a spring 16 is interposed between the upper stand 20 and a support plate 19 on the guide rod 18. Therefore, the presser plate 15 is always pressed downward.

The state shown in FIG. 4 shows the state in which the presser plate 15 is pressed downward by the spring 16, and the overall state is before cutting (same as in FIG. 2). The level of the highest cutting edge portion of the corner cutter upper die 12 is arranged so that the level of the presser plate 15 is approximately equal to or slightly inside the side of the presser plate 150 that comes into contact with the metal foil 14 during cutting.

The presser plate 15 has an insertion hole 15a having a shape similar to the cross section of the corner cutter 12.

As will be explained later, it is necessary to move the corner cutter 12 up and down without any trouble, but it is necessary to create as little a gap as possible between the corner cutter 12 and the cross section as described above.

There is no need to explain the lower die 11, so the explanation will be omitted.

Now, when the time to cut the metal foil has come and the base 20 is lowered, the metal foil 14 is first fixed between the lower die 11 and the presser plate 15, and then, at the same time or a little later, the corner cutter 1 is cut.
The highest cutting edge portion of No. 2 hits the metal foil 14.

The base 20 descends while resisting the spring 16, and when the base 20 finishes descending, the metal foil 14 is cut into a predetermined shape by the corner cutter 12, and the corner cutter 12 rises together with the upper base 20.

At this time, the cut metal foil piece is attached to the protrusion 1 on the holding plate 15.
5C, the holding plate 15 covers the surface of the cut metal foil piece until it is released from contact with the lower die 11.
The metal foil pieces do not come out upward through the narrow gap on the holding plate 15, but instead fall into the waste receptacle 13 provided directly below.

At the same time as corner cutting, perforations are also made using the perforation blade 10 and the perforation lower mold 9.

With this configuration, a predetermined extremely accurate cutting operation can be performed without the metal foil piece being accidentally wound into the capacitor element being wound.

Although Fig. 2 shows a device that can perform cutting operations simultaneously in two stages (upper and lower), the same work can be done with a single or multi-stage configuration. It goes without saying that the device can be used.

As described above, according to the present invention, conventional manual work, which requires human labor, can be easily performed, so that the labor-saving effect is significant.

[Brief explanation of drawings]

Figures 1A and B are diagrams explaining the cutting portion of metal foil for condenser electrodes, Figure 2 is a schematic diagram of the cutter of the present invention, Figure 3 is a partial diagram of the corner cutter of the present invention, and Figure 4 is a diagram of the corner cutter of the present invention. 1 is a side view of the cutter of the present invention showing a partial cross section, 1 is a frame, 2 is a drive device, 3 is a transmission shaft, 4 is an eccentric pin, 5 is a connecting rod, 6 is a joint pin, and 7 is a vertical Operating rod, 8 is a mounting girder, 9 is a perforation lower mold, 10 is a perforation blade, 11 is a corner cutter lower mold, 12 is a corner cutter upper mold, 13 is a waste catcher, 14 is a metal foil, 15 is a holding plate, 15a 15 is an insertion hole drilled in the holding plate, 15 C is a protrusion into the insertion hole, 16 is a spring, 17 is a holding plate for supporting and guiding the spring 16, and 19 is a support plate provided in the middle of the guide rod. , 20 is the foundation.

Claims (2)

[Scope of utility model registration request] (1) The frame that supports the corner cutter lower mold and perforation lower mold supports an operating rod that moves up and down vertically, and the mounting method that moves up and down together with the operating rod is compatible with the corner cutter lower mold and perforation lower mold. A metal foil cutter for a capacitor element winding machine that has a corner cutter upper die and a perforated blade. (2) The holding plate that holds down the metal foil when cutting the metal foil has an insertion hole, and the corner cutter is attached to a base fixed to the mounting frame by a guide rod via a spring so as to move up and down through the insertion hole of the holding plate. Claim No. 1 for Utility Model Registration Supported
Metal foil cutter for capacitor element winding machine described in section