JP3197366B2 - Metal deposition film margin processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a margin processing apparatus which forms a margin by scanning and irradiating a laser beam while continuously running a film having a metal deposited film formed on a surface thereof to evaporate the metal deposited film. In particular, the present invention relates to an improvement for detecting an abnormality in margin processing.

[0002]

2. Description of the Related Art Metal-deposited films of this kind are used, for example, in the production of film capacitors. A film capacitor is manufactured by laminating two long resin films each having a metal vapor-deposited film formed on a surface thereof, winding the same in a cylindrical shape, and spraying electrodes on both ends of the cylindrical body. A technique has been widely adopted in which a non-deposited portion called a margin is formed in a metal vapor-deposited film of a film to divide the metal vapor-deposited film into a large number of regions that are not electrically connected to each other.

If the metal deposition film is divided into a number of regions as described above, even if a short circuit occurs between the metal deposition films of the respective films, the connection between the region including the short-circuit portion and the electrode conducting therewith is realized. The metal evaporates, and this fuse action stops the energization of the region, thereby providing an effect of preventing burning of the capacitor and peripheral devices.

[0004] As an apparatus for forming the margin, an apparatus described in Japanese Patent Publication No. 3-59981 is known. This device consists of a recoiler and an uncoiler that continuously runs a film with a metal deposited film formed on the surface, a cooling drum that supports the back of the film and rolls as the film runs, and a polygon mirror that emits laser light emitted by a laser light oscillator. And a laser beam irradiation mechanism for irradiating the film on the cooling drum with the fθ lens while scanning the film in the width direction, and evaporating the metal deposition film on the film to form a margin.

[0005]

By the way, in the margin processing apparatus as described above, after a certain period of time, metal vapor or the like adheres to the polygon mirror and the fθ lens, so that fogging is likely to occur, and the intensity of the laser beam reaching the film is increased. Is insufficient, and a processing error such as a break in the margin occurs.

For this reason, conventionally, an operator inspects the running film with the naked eye and stops the apparatus when an abnormality in the margin is found, but it requires a long time and labor.
Since the margin is as thin as 0.1 to 0.5 mm in width, there are many oversights of processing abnormalities, and in such a case,
There were drawbacks, such as inferior products being mixed in the product film.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide an apparatus for processing a margin of a metal-deposited film, which can detect abnormality in a margin early and surely and automatically.

[0008]

A margin processing apparatus for a metallized film according to the present invention comprises: a film feed mechanism for moving a film having a metallized film formed on a surface thereof; A cooling drum that rolls, and a laser beam emitted by a laser oscillator irradiates the film on the cooling drum while scanning in the width direction of the film, and a laser beam that forms a margin by evaporating a metal deposition film on the film. A metallized film margin processing apparatus having an irradiation mechanism, an imaging unit provided downstream of the cooling drum for imaging a part of the film surface and outputting an image signal; Scanning means for scanning in accordance with the method, and an imaging position for driving the scanning means in accordance with the film traveling speed and the laser beam scanning speed. A control unit, and an image processor that compares an image signal from the imaging unit with normal margin data when the imaging range of the imaging unit matches the margin, and determines whether or not the image signal is normal. I do.

[0009]

In this apparatus, while the imaging means scans the film in the width direction in accordance with the film traveling speed and the laser light scanning speed, when the imaging range of the imaging means coincides with the margin of the film surface after laser light irradiation. A part of the film surface is imaged, and the obtained image signal is compared with normal margin data stored in advance by an image processor to determine whether or not the film is normal. Therefore, it is possible to reliably and automatically find a margin abnormality.

[0010]

FIG. 1 is a block diagram showing the construction of an embodiment of a margin processing apparatus for a metal-deposited film according to the present invention.
Is a block diagram of the margin inspection system that is the main feature of the device,
FIG. 3 is a flowchart showing the operation of the margin inspection system.

First, the overall configuration of the apparatus will be described with reference to FIGS. Reference numeral 1 denotes a recoiler (film feeding mechanism) for holding a film coil.
From this, the film F having the metal deposition film formed on the surface is fed at a constant speed. The fed film F is wound around an uncoiler 8 (film feeding mechanism) through a number of rollers 2, and in the middle thereof, a cooling drum 4 supporting the back surface of the film F and rolling with the film F, and a film D A slitter 6 for cutting F into a narrow width is provided.

The cooling drum 4 is provided with a rotary encoder 4A, and its output signal is transmitted to a laser beam irradiation control mechanism 10. The laser light irradiation control mechanism 10 operates the laser light oscillator 12 to generate one laser light pulse R every time the film F travels for the margin interval, and synchronizes the polygon mirror 14 with the travel of the film F. The laser light pulse R is reflected continuously and focused by the fθ lens 16. Thus, the laser light pulse R is irradiated on the film F on the cooling drum 4 while scanning over the entire width (or a part of the width direction) of the film F for each pulse, and at regular intervals in the longitudinal direction of the film F. The metal deposition film is linearly removed to form a margin.

In the vicinity of the polygon mirror 14, two angle sensors 17 for detecting the rotational phase of the polygon mirror 14 are provided.
A and B are arranged. The output of the first angle sensor 17A is transmitted to a mirror control mechanism 42 in the laser beam irradiation control mechanism 10 shown in FIG. 2, and the rotation phase of the polygon mirror 14 by the mirror rotator 40 is feedback-controlled. .

On the other hand, the output of the second angle sensor 17B is counted by a counter 18 and transmitted to a camera position control mechanism 20, as shown in FIGS. The camera position control mechanism 20 operates the camera scanning mechanism 26 based on the rotation phase of the polygon mirror 14, and moves the CCD camera 22 disposed downstream of the cooling drum 4 toward the film F in the width direction of the film F. Scan over the full width (one portion if necessary). Further, as shown in FIG. 1, a light source 24 is provided at a position facing the CCD camera 22 with the film F interposed therebetween.

The CCD camera 22 is connected to an image processor 28. The image processor 28 has a read signal generation circuit 44 (see FIG. 2) for detecting the rotation of the polygon mirror 14 by the counter 18 and reading the output signal. It is connected.
The read signal generation circuit 44 generates a read signal in synchronization with the film traveling speed detected by the encoder 4A and the laser beam scanning timing detected by the angle sensor 17B.
Upon receiving the read signal, the image processor 28 causes the CCD camera 22 to take an image, analyzes the image signal, and
It is determined whether the margin is normal. A monitor 30 is connected to the image processor 28 and displays an image read from the CCD camera 22 until the next image is read.

If the result of the determination is "normal", the image processor 28 waits for the next read signal and reads the next image. On the other hand, if the judgment result is "abnormal", the power breaker 32 is operated to stop the running system of the film F, the laser beam irradiation system, the slitter 6 and the camera driving system, and the alarm device 34 is operated. And let them know about the anomaly.

Next, using the flowchart shown in FIG.
The operation of the margin inspection system will be described in detail. When the margin inspection of the film F is started, first, the camera position control mechanism 20 activates the camera scanning mechanism 26 to move the CCD camera 22 to the initial position of one end in the width direction of the film F (FIG. 4).
At the position of n = 1) and stores the variable n = 1.
At this position, the CCD camera 22 is made to wait, and a read signal from the read signal generating circuit 44 is waited.

As the film F travels, the CCD camera 2
When the imaging position 2 and the margin M match, the read signal generation circuit 44 generates a read signal at that timing, and the image processor 28 operates the CCD camera 22 to read the image signal for one screen. As shown in FIG. 4, the size of one screen A is horizontal a × vertical b, and the horizontal direction corresponds to the width direction of the film F.

The image processor 28 reads out the output level of each pixel constituting the screen A while sequentially scanning in the vertical direction of the screen as shown in FIG. 5, and sets "0" based on a predetermined binarization level. Alternatively, the length is binarized to “1”, and the length t at which the binarized signal is “1” is calculated. And if this length t is out of the margin width allowable range or is 0,
The image processor 28 generates an abnormal signal and activates the power breaker 32 and the alarm device 34. If there is no abnormality, the scanning line position within the same screen A is moved in the horizontal direction, and the same processing is repeated one after another to complete the inspection of one screen A.
The number of scanning lines in one screen A can be arbitrarily set according to the required resolution. For example, it is possible to use only one scanning line in one screen A.

When the inspection for one screen is completed in this manner, the camera position control mechanism 20 operates the camera scanning mechanism 26 to move the CCD camera 22 to the other end of the film F by one screen, that is, the distance a. . Also, add 1 to the variable n and confirm that (a × n) is smaller than the required film inspection width w. This is to confirm whether or not the screen position has reached the edge of the film F. Then, after the read signal is received again, the same inspection as described above is performed. In this way, the inspection is repeated sequentially at the positions of n = 3, 4, 5,..., And when the imaging position reaches the end of the film F, the CCD camera 22 is returned to the initial position and the inspection is continued again.
It should be noted that, as shown by the symbol p in FIG. 4, once a margin abnormality occurs, it always appears repeatedly in the same place until the cause is removed.

According to the margin processing apparatus for a metal-deposited film having the above-described configuration, even if an abnormality occurs in the margin M due to contamination of the optical system, it is possible to reliably and automatically detect the abnormality. In this apparatus, only one screen is inspected for one margin, and the film F
The inspection position can be moved by one screen one after another while being able to cope with the case where the traveling speed of the film F is high, so that the inspection can be performed without producing a blind spot over the entire width of the film F, and the reliability is extremely high. Has advantages.

The present invention is not limited to the above-described embodiment, and the details of the apparatus may be diverted from other known structures. Further, the film F to which the present invention is applied is not limited to those for manufacturing a capacitor.

[0023]

As described above, according to the apparatus for processing a margin of a metallized film according to the present invention, the imaging means scans the film in the width direction in accordance with the film traveling speed and the laser beam scanning speed, and the image is taken. When the imaging range of the means coincides with the margin of the film surface after laser light irradiation, a part of the film surface is imaged, and the obtained image signal is compared with normal margin data previously stored by the image processor. Since it is determined whether the product is normal or not, it is possible to reliably and automatically detect an abnormality in the margin, and it is possible to greatly improve the reliability of the product.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a margin processing apparatus for a metal-deposited film according to the present invention.

FIG. 2 is a block diagram of a margin inspection system which is a main feature of the apparatus.

FIG. 3 is a flowchart showing the operation of the margin inspection system.

FIG. 4 is an explanatory diagram of an operation of the margin inspection system.

FIG. 5 is an explanatory diagram of a signal processing method in the margin inspection system.

[Explanation of symbols]

 1, 8 Recoiler, uncoiler (film running mechanism) 4 Cooling drum 6 Slitter 10 Laser beam irradiation control mechanism (Laser beam irradiation mechanism) 12 Laser beam generator (Laser beam irradiation mechanism) 14 Polygon mirror (Laser beam irradiation mechanism) 16 fθ Lens (laser beam irradiation mechanism) 20 Camera position control mechanism (imaging position control means) 22 CCD camera (imaging means) 26 Camera scanning mechanism (scanning means) 28 Image processor 32 Power cut-off device 34 Alarm device 44 Read signal generation circuit

Claims (1)

(57) [Claims] 1. A film feed mechanism for running a film having a metal vapor deposited film formed on a surface thereof, a cooling drum which supports the back surface of the film and rolls as the film runs, Irradiate the film on the cooling drum while scanning in the width method of,
In a margin processing apparatus for a metal-deposited film, comprising a laser beam irradiation mechanism for forming a margin by evaporating the metal-deposited film on the film, a part of the film surface provided downstream from the cooling drum is imaged. Imaging means for outputting an image signal; scanning means for scanning the imaging means in a film width manner; imaging position control means for driving the scanning means in accordance with a film traveling speed and a laser light scanning speed; An image processor that compares an image signal from the imaging unit with normal margin data when the imaging range of the unit matches the margin, and an image processor that determines whether or not the margin is normal. Processing equipment.