JPH0917690A - Take up device for metallized film capacitor - Google Patents

Abstract

PURPOSE: To discharge electricity between a film and a feeder aluminum foil circulation roller provided for metal removal and melt the deposited metal so as to remove by switchably connecting a switching electrode roller to both an electrostatic capacity meter and the feeder aluminum foil circulation roller and switching in response to a signal from the electrostatic capacity meter. CONSTITUTION: When a metallized film (f) fed from a supply roller 1 reaches a switching electrode roller 2, a metallized film take up roller 8 takes up the film, while measuring the electrostatic capacity. When the electrostatic capacity reaches the set value, a signal is outputted from an electrostatic capacity meter 3, a relay contact 4 is switched, and a positive voltage is applied to the switching electrode roller 2, while a negative voltage is applied to a feeder aluminum foil circulation roller 6 provided for metal removal. A pressing roller 5 is permitted to press the metal deposited film (f) to the negatively charged film (f). The metal film melts and is removed by the heat generated by electric discharge and adheres on the negatively charged aluminum foil. Namely, the metal removal is automatically performed, and the whole device is downsized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metallized film winding device used for manufacturing a metallized film capacitor.

[0002]

2. Description of the Related Art Metallized film capacitors include polyethylene terephthalate (PET) and polypropylene (P
Produced by using a film such as P) as a dielectric film, vapor-depositing a metal such as aluminum on one surface, and winding two metal vapor-deposited films into a cylindrical shape or an elliptic cylinder shape. To be done. At that time, if vapor-deposited metal is present at the beginning and end of winding, a short circuit may occur, so that the portion is wound with the metal peeled off. FIG. 4 is a diagram for explaining this, 21 is a dielectric film, 22 is a metal vapor-deposited on the film, 23 is a winding start point, 24 is a winding end point, and 25 is a winding shaft of a winding roller. FIG. 5 is a perspective view showing the shape of the wound film capacitor.

The above-mentioned peeling of the metal at the end of the film is
It is carried out by incorporating it into the series of steps when winding the film. This will be described with reference to FIG. That is, the metal vapor deposition film sent out from the pair of metal vapor deposition film supply rollers 26 approaches the pair of metal peeling power supply aluminum foils at a predetermined position before the two sheets are united, and thereby the predetermined length. The metal is peeled off to proceed to the take-up roller and is taken up.

The peeling mechanism by the power feeding aluminum foil for peeling the metal will be described below. That is, a pair of metal peeling power supply aluminum foil rollers 27, 28, a pressing roller 29, and a guide roller 30 are installed as shown in FIG. 6, and (+) power feeding to the metal peeling power supply aluminum foil rollers 27, 28, respectively. (-) Power is supplied. When the metal deposition film is pressed in the direction of the arrow by the pressing roller 29, the metal deposition film first contacts the (+) side aluminum foil 27 and then approaches the (−) side aluminum foil 28. Then, electric discharge is generated between the metal vapor deposition film and the (−) side aluminum foil 28, and the vapor deposition metal is peeled off from the film.

Further, in manufacturing a metallized film capacitor, it is necessary to manufacture a capacitor having a small error in capacitance value, and therefore, winding may be performed while measuring the capacitance until the capacitance value reaches a desired value. In this case, the electrostatic capacitance detection roller 31 is installed in the middle of the winding process, and the metal vapor deposition film sent out from the pair of metal vapor deposition film rollers passes through the electrostatic capacitance detection roller to the winding roller. And proceed.

[0006]

As described above, in the conventional winding device for the metallized film capacitor, the capacitance detecting roller and the pair of power supply aluminum foil rollers for peeling the metal are incorporated on both sides, respectively. Since the devices associated with each are also required, the overall construction is rather complicated and therefore sufficient space must be reserved for it.

An object of the present invention is to improve the function of the winding device for the metallized film capacitor by improving the complicated structure as described above to make the structure more compact.

[0008]

The present invention has achieved the above object by using an electrode roller, which has been conventionally used for detecting electrostatic capacitance, as a power supply for peeling a metal film. That is, the present invention, in a winding device for a metallized film capacitor having a pair of metallized film supply rollers, and a winding roller for winding up the metallized film supplied from the pair of metallized film supply rollers. A switchable electrode roller, which is switchably connected to both the capacitance meter and the power supply aluminum foil circulation roller for metal stripping, is arranged between both rollers, and the switching is performed by a signal from the capacitance meter. A winding device for a metallized film capacitor, which is characterized by being made.

[0009]

In the winding device of the present invention, the roller which has been used as a capacitance detecting roller in the past is used as a switching type electrode roller, and this is used as a capacitance meter via a relay contact, and a power supply-power supply for metal stripping. The aluminum foil circulating roller is switchably connected so that the signal from the capacitance meter reaches the relay contact, so if the capacitance reaches the set value during winding, the relay contact is automatically turned off. Instead, the switchable electrode roller is connected to the power supply aluminum foil circulation roller for metal stripping via the power supply, the switchable electrode roller is (+) power supply, and the metal stripping power supply aluminum foil circulation roller is (-) power supply (or this Reverse).

Therefore, when the capacitance reaches the set value and the relay contact is switched, the film passing through the switchable electrode roller is fed with (+) power, while the aluminum strip circulating roller for peeling metal is fed with (-) power. As a result, a discharge occurs between the two, and as a result, the evaporated metal melts and peels off,
Adheres to aluminum foil for metal peeling.

Since the metal of the vapor-deposited metal film is peeled off in this manner, when the present apparatus is used, the metal is automatically peeled off when the capacitance value reaches a certain set value. Further, the conventional power supply device for exclusive use of the aluminum foil for metal stripping is no longer necessary, and the aluminum foil roller for metal stripping does not need a pair of (+) power feed and (-) power feed as in the conventional technology. The device becomes more compact. Further, if the power feeding aluminum foil circulating rollers for peeling the metal are not separately provided on both sides but one continuous one is provided as shown in FIG. 1, for example, the front surface on the left side becomes the back side on the right side. So both sides of aluminum foil can be used.

[0012]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a device layout diagram for explaining an embodiment of the present invention. As shown in FIG. 1, this metallized film capacitor winding device includes a metallized film supply roller 1, a switchable electrode roller 2, a capacitance meter 3, a relay contact 4, a holding roller 5, and a metal peeling power supply. It is composed of an aluminum foil circulation roller 6, a guide roller 7, a metallized film take-up roller 8, a power supply 9 and the like. The switchable electrode roller 2 is switchably connected to a capacitance meter 3 and a power supply 9 by a relay contact 4, and the power supply 9 is connected to a metal peeling power supply aluminum foil circulation roller 6. The signal from the capacitance meter 3 is sent to the relay contact 4.

Next, the process of winding the metallized film with this apparatus will be described. The metallized film f is sent out from the supply roller 1. Since the leading end portion of the film is a portion obtained by cutting the last end of the previous winding operation, the metal has already been peeled off, and the film can be wound as it is without performing the metal peeling operation. The metallized film f sent out from the supply roller 1 reaches the switchable electrode roller 2, and at this time, since the switchable electrode roller 2 is connected to the capacitance meter 3, the capacitance is measured here. It

Metallized film f while measuring capacitance
Is taken up by the metallized film take-up roller 8. When winding progresses and the capacitance value reaches a certain set value,
A signal is output from the capacitance meter 3 and the relay contact 4 is shown in FIG.
Is switched from the black circle direction to the white circle direction and is connected to the power supply 9, so that the (+) voltage is the switchable electrode roller 1
Applied to the metallized film, the metallized film becomes positively charged. On the other hand, the (-) voltage is applied to the power supply aluminum foil circulating roller 6 for metal stripping. Subsequently, the pressing roller 5 operates in the direction of the arrow to press the metal vapor deposition film f against the aluminum foil 6 applied to (-). Then, electric discharge starts between the (+) metallized film and the (-) aluminum foil 6, and the metal film is melted by the Joule heat and adheres to the (-) aluminum foil 6.

In this way, the metal of the metallized film is peeled off, and the metallized film take-up roller 8 takes up a predetermined amount. During this time, the peeling is continuously performed. The length of peeling is initially set by a program, and when it reaches a predetermined length, the film is cut in the middle of the peeled film. After the winding is completed, the outer side is finally sealed to be a finished product. The edge of the film that remains after being cut is sandwiched by a new winding shaft, winding is performed, and the first operation is repeated. Therefore, at the beginning of winding, the metal is peeled off for a predetermined length. After the peeling is completed, the relay contact is switched to the capacitance meter 3 side again.

Since the metallized film is wound up in this way in this apparatus, when the electrostatic capacitance value reaches a certain set value, the metal is automatically peeled off, and the winding start end and end end are wound. A metallized film capacitor with metal removed is created.

Further, this apparatus does not require a power supply device dedicated to aluminum foil. Further, in this device, it is not necessary to use the aluminum foil device as a pair of (+) power supply and (-) power supply as in the conventional case, and the device becomes compact accordingly. Further, if the aluminum foil device for peeling the metal is not separately provided on both sides and one continuous one is provided as shown in FIG. 1, for example, the front surface on the left side becomes the back side on the right side. Both sides of aluminum foil can be used.

FIG. 2 is an enlarged view of a portion where the metal is peeled off from the metal vapor deposition film f in the present apparatus. (A) shows the case where the metal is not peeled off, and (b) shows the case where the metal is peeled off. f'denotes a film with the metal peeled off. Further, FIG. 3 is an enlarged view of the winding portion of the film, (a) shows the winding of the metal vapor-deposited film, and (b) shows the winding of the portion where the metal is peeled off.

The power supply used in the above apparatus is about DC30V DC, but the polarity of the power supply may be (+) on the switching electrode roller side and (-) on the aluminum foil side, or vice versa, as described above. The switchable electrode roller side may be (-) and the aluminum foil side may be (+). Further, the roller may have a cylindrical shape, but it may have a rod pulley shape having a groove in the cylinder, and this is more preferable.

[0021]

As described above, according to the metallized film capacitor winding device of the present invention, metal peeling is automatically performed when the capacitance value reaches a certain set value, and the capacitance detection is performed. Since the roller for use also functions as a power supply roller for peeling metal, it does not require a dedicated aluminum foil power supply device for metal peeling as in the past, and (+)
It is not necessary to provide a pair of power supply and (-) power supply. Therefore, the entire device can be made much more compact than the conventional one.

[Brief description of the drawings]

FIG. 1 is a device layout diagram illustrating an embodiment of the present invention.

2A and 2B are enlarged views of a portion where the metal is peeled off from the metal vapor deposition film in the apparatus of FIG. 1, where FIG. 2A shows the case where the metal is not peeled off, and FIG. 2B shows the case where the metal is peeled off.

FIG. 3 is an enlarged view of a film winding portion in the apparatus of FIG. 1, (a) showing winding of a metal vapor-deposited film, and (b) showing winding of a portion where the metal is peeled off.

FIG. 4 is a diagram illustrating a metal vapor deposition state at the beginning and end of winding of a film in a conventional winding method.

FIG. 5 is a perspective view showing the shape of a wound film capacitor.

FIG. 6 is a diagram showing a conventional metallized film capacitor winding device.

[Explanation of symbols]

1 ... Metallized film supply roller, 2 ... Switchable electrode roller, 3 ... Capacitance meter, 4 ... Relay contact, 5
... Pressing roller, 6 ... Power supply aluminum foil circulation roller for metal peeling, 7 ... Guide roller, 8 ... Metalized film winding roller, 9 ... Power supply.

Claims (2)

[Claims] 1. A pair of metallized film supply rollers,
In a winding device of a metallized film capacitor having a winding roller that winds the metallized film supplied from the pair of metallized film supply rollers in an overlapping manner,
A switchable electrode roller, which is switchably connected to both the capacitance meter and the power supply aluminum foil circulation roller for metal stripping, is arranged between both rollers, and the switching is performed by a signal from the capacitance meter. A winding device for a metallized film capacitor, which is characterized by being made. 2. The winding device for a metallized film capacitor according to claim 1, wherein a pair of metal peeling power supply aluminum foil circulation rollers are continuously integrated.