JPH0569169A - Laser beam machine - Google Patents

Abstract

PURPOSE:To improve the productivity and to prevent the cut position from deviating by melting and removing a metallic film mounted on a synthetic resin film through laser light and at the same time cutting the part with a cutter. CONSTITUTION:When a voltmeter 32 detects that a cutter edge 28a and a metallic film 2 come in contact with each other, a holder 21 is lowered to a position where a synthetic resin film 1 can be cut by the edge 28a. A laser beam generator 27 is actuated to output laser light L and to carry the synthetic resin film 1 in synchronization with pulse oscillation. The laser light L is outgone from a kaleidoscope 24 and melted and removed by a width dimension corresponding to the spot shape of the laser light L. When a film 1 is transmitted, the metallic film 2 of the film 1 is removed by the edge 28a of the cutter 28 and the margin part is cut. Consequently, as soon as the metallic film 2 is melted and removed, the film 1 can be cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for removing a metal film laminated on a synthetic resin film with a laser beam in a predetermined width dimension, and then cutting the part of the synthetic resin film from which the metal film is removed. Laser processing apparatus.

[0002]

2. Description of the Related Art For example, in the case of forming a film capacitor, as shown in FIGS. 7 and 8, a synthetic resin film 1 such as PET (polyethylene terephthalate) is vapor-deposited with a metal film 2 such as aluminum to form two films. It is formed by winding the thin film body 3 of. In that case, in order to secure a withstand voltage between the metal films 2 (electrodes) at the ends of the two thin film bodies 3, a portion without the metal film 2, that is, the margin portion 4 is formed on the synthetic resin film 1. ing.

In order to form the margin portion 4, the laser light L output from the laser generator 5 in a pulse form as shown in FIG.
Incident on. Laser light L having a uniform cross-sectional shape and a rectangular cross-section is emitted from the calliscope 7, and the laser light L is condensed by a condenser lens 8 to be described above. By irradiating the processed portion of the metal film 2 and causing the thin film body 3 to travel at a predetermined pitch in synchronization with the pulse oscillation of the laser light L, the metal film 2 is removed in a band shape having a predetermined width dimension, The margin portion 4 can be formed.

As described above, the thin film body 3 from which the metal film 2 is removed is cut into a width center portion of the margin portion 4 by the cutter 10 as shown in FIG. A thin film body 3 having a size can be obtained.

However, if the thin film body 3 is formed by such a processing method, the work of removing the metal film 2 and the work of cutting from the removed portion are separate works, which leads to a decrease in productivity. There is. Further, in the above cutting work, since the cutter 10 has to be aligned with the widthwise center of the portion where the metal film 2 has been removed, not only skill is required for the work, but even if alignment is performed, the synthetic resin film There is a case where the cutting position is displaced due to the twist of No. 1 or the like, which causes a cutting failure.

[0006]

As described above, conventionally, the work of removing the metal film and the work of cutting the removed portion are carried out in separate steps. Therefore, not only the productivity is poor, but also the alignment work is troublesome. There were things such as it took time.

The present invention has been made based on the above circumstances, and its purpose is to remove a metal film and
An object of the present invention is to provide a laser processing apparatus capable of simultaneously performing the cutting work of the removed portion.

[0008]

In order to solve the above-mentioned problems, the first means of the present invention is to remove a metal film laminated on a synthetic resin film with a predetermined width dimension, and to remove the metal of the above-mentioned synthetic resin film. In a laser processing apparatus for cutting the portion where the film is removed, a laser generator and an optical fiber on which laser light output from the laser generator is incident,
A callide scoop that homogenizes the intensity distribution of laser light from the optical fiber and shapes the laser light cross-section into a substantially rectangular shape, a holder that holds this callide scoop, and the inside of the tip of this holder. And a cutter provided on the tip of the holder with the cutting edge at substantially the same height as the focus position of the condenser lens, which is held by the condenser lens for condensing the laser light emitted from the kaleidoscope. And scanning means for relatively scanning the synthetic resin film and the condensed laser light.

A second means of the present invention is a laser processing for removing a metal film laminated on a synthetic resin film with a predetermined width dimension and cutting a portion of the synthetic resin film from which the metal film is removed. In the apparatus, a laser generator, an optical fiber to which laser light output from the laser generator is incident, and one end face of which is optically connected to the optical fiber, And a condenser lens for uniformizing the intensity distribution of the laser light and for shaping the laser light into a substantially rectangular cross-sectional shape, a condenser lens for concentrating the laser light emitted from the kaleidoscope, and the above-mentioned collector. Lighted ray
A scanning means for relatively scanning the light and the synthetic resin film, and a band-shaped light-transmitting portion along the scanning direction is left in the central portion of the other end surface of the kaleidoscope, and is formed in a portion other than this light-transmitting portion. And an attenuator, which attenuates the laser light to such an intensity that the condensed laser light removes the metal film and does not cut the synthetic resin film.

[0010]

According to the first means, the portion of the synthetic resin film from which the metal film has been removed can be cut by the cutter while removing the metal film with laser light.

According to the above-mentioned second means, the callide scale
The laser light transmitted through the light-transmitting part of the laser and condensed by the condenser lens has a higher intensity than the laser light condensed through the attenuating part, and therefore passes through the attenuating part. At the same time as the laser light removes the metal film, the laser light transmitted through the light transmitting portion cuts the synthetic resin film.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A laser processing apparatus according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention,
Reference numeral 21 in the figure denotes a cylindrical holder that is mounted substantially vertically on the mounting portion 20 of the processing apparatus and is vertically drivable. An upper hole portion 22 having a rectangular cross-section and a lower hole portion 23 having a circular cross-section are formed in the holder 21 in order in the vertical direction so as to communicate with each other. A prismatic kaleidoscope 24 is inserted and held in the upper hole portion 22, and the large diameter hole portion 2 is held.
A condenser lens 25 is held at 3.

One end of an optical fiber 26 is optically connected to the rear end face of the callide scope 24. The other end of the optical fiber 26 is connected to a laser generator 27 that generates the laser light L in a pulse shape. Therefore, the laser light L generated by the laser generator 27 is transmitted to the optical fiber 2
It is designed to be incident on the callide scope 24 through 6. The laser light L that has entered the kaleidoscope 24 is shaped into a quadrangular cross section, is emitted with a uniform intensity distribution within the cross section, and is focused by the condenser lens 25 into a spot having a rectangular cross section. To be done.

The lower end of the holder 21 is a taper portion 21a.
Is formed on the outer surface of the taper portion 21a, and the cutting edge 28
A cutter 28 having a is provided. This cutter 2
The tip of the cutting edge 28a of 8 and the focal position of the condenser lens 25 are both positioned on the same plane in the direction orthogonal to the optical axis of the laser light L. That is, they are set at almost the same height position. A shield pipe 29 for ejecting a shield gas such as nitrogen from the tip opening of the holder 21 is connected to the taper portion 21a. If shield gas is ejected from the shield pipe 29,
It is possible to prevent the melted material scattered by the cutting operation of the laser light L described later from adhering to the condenser lens 25.

Below the holder 21, the synthetic resin film 1 on which the metal film 2 is vapor-deposited has the metal film 2 on the upper side, and is guided by the metal guide roller 30 to be intermittently arranged at a predetermined pitch in the arrow direction. It is designed to be transported. A straight line connecting the tip of the cutting edge 28a and the focal position of the condenser lens 25 is set in the same direction as the transport direction of the synthetic resin film 1.

A power supply 31 is provided between the cutter 28 and a guide roller 30 that contacts the metal film 2, and the voltage between the cutter 28 and the metal film 2 is measured by a voltmeter 32. That is, when the holder 21 is lowered and the blade edge 28 a of the cutter 28 contacts the metal film 2, the blade edge 28 a
Since the a is electrically connected to the guide roller 30, the voltage measured by the voltmeter 32 decreases. Therefore,
The contact state between the blade edge 28a of the cutter 28 and the metal film 2 can be automatically detected by the fluctuation of the voltage of the voltmeter 32.

When the metal film 2 is removed and the synthetic resin film 1 is cut by the laser processing apparatus having the above-described structure, first, the holder 21 is lowered and the cutting edge 2 of the cutter 28 is cut.
8a is brought into contact with the metal film 2. When the voltmeter 32 detects that the blade tip 28a and the metal film 2 are in contact with each other, the holder 21 is further lowered slightly to a position where the blade tip 28a can cut the synthetic resin film 1. As a result, the metal film 2 can be automatically positioned substantially at the focal position of the condenser lens 25.

Next, the laser generator 27 is operated to output the laser light L, and the synthetic resin film 1 is conveyed in synchronization with the pulse oscillation of the laser light L. The laser light L output from the laser generator 27 is the optical fiber 26.
The light is emitted from the kaleidoscope 24 through the condenser lens 25 and is converged by the condenser lens 25 into a rectangular cross section having a uniform intensity distribution, so that the metal film 2 positioned substantially at the focus of the condenser lens 25 is irradiated. It is melted and removed in a width dimension corresponding to the spot shape of the laser light L. Then, if the synthetic resin film 1 is driven intermittently, the metal film 2 is removed in a strip shape along the carrying direction, and the margin portion 4 is removed.
Is formed.

When the synthetic resin film 1 is conveyed,
The cutting edge 28a of the cutter 28 provided on the holder 21 cuts the margin portion 4, which is the portion of the synthetic resin film 1 from which the metal film 2 has been removed. That is, the synthetic resin film 1 can be cut at the same time when the metal film 2 is melted and removed. The cutting edge 28a and the optical axis of the laser light L are located on the same straight line along the transport direction of the synthetic resin film 1. Therefore, the cutting edge 28a has the laser light L
The central portion in the width direction of the margin portion 4 formed by the above is cut, and the cutting is performed at the same time as the removal of the metal film 2 in the vicinity of the irradiation portion of the laser light L. Even if the sheet 1 is twisted during transportation, its cutting position is hardly displaced from the center of the margin portion 4 in the width direction.

3 and 4 show another embodiment of the present invention. In this embodiment, the means for cutting the synthetic resin film 1 is different from the one embodiment. That is, callide scope 2
The end face of the light emitting side of No. 4 is a band-shaped light transmitting portion 24a which transmits almost 100% of the laser light L in the widthwise central portion, and the light transmitting portion 24a which is the remaining portion is attenuating portion on both sides. Is formed on the scattering portion 24b that scatters the laser light L, for example, is formed of an uneven surface. The laser light L emitted from the light transmitting portion 24a is incident on the condenser lens 25 without loss and is focused, and the laser light L emitted from the scattering portion 24b is scattered to the surroundings. The light enters the condenser lens 25 and is focused.

Therefore, the intensity distribution of the laser light L emitted from the kaleidoscope 24 and focused by the condenser lens 25 has an intensity at the central portion in the width direction corresponding to the light transmitting portion 24a as shown in FIG. S1 is the scattering portion 24 on both sides of the light transmitting portion 24a.
It is higher than the strength S2 of the portion corresponding to b. The intensity S1 of the laser light L emitted and focused from the light transmitting portion 24a is set to an intensity that can not only melt the metal film 2 but also cut the synthetic resin film 1, and the scattering portion 24b. Which is emitted from the lens and focused by the condenser lens 25.
If the intensity S2 of the laser light L is set so that the metal film 2 is melted and removed but the synthetic resin film 1 is not cut, the laser light L of intensity S2 forms the margin 4 at the same time. , The synthetic resin film 1 can be cut from the central portion of the margin portion 4 in the width direction by the laser light L having the intensity S1.

Moreover, the removal of the metal film 2 and the cutting of the margin portion 4 of the synthetic resin film 1 from which the metal film 2 has been removed can be performed at the same position at the same time.
It does not deviate from the center of the gin portion 4 in the width direction.

In this embodiment, the scattering portion 24b is provided on the end face of the kaleidoscope 24 as an attenuating portion for attenuating the intensity of the laser light L incident on the condenser lens 25.
However, instead of the scattering portion 24b, the attenuating portion may be provided with a partial reflection coating capable of reducing the amount of transmission of the laser light L on the emission end face of the kaleidoscope 24. ..

[0025]

As described above, according to the present invention, the metal film provided on the synthetic resin film is melted and removed by laser light, and at the same time, the removed portion can be cut by the cutter.

Further, according to the present invention, an attenuating portion is formed on a portion of the emitting end face of the calliscopic scope except the central portion in the width direction,
Rays emitted from the emission end face and incident on the condenser lens
By controlling the intensity of the light, the metal film laminated on the synthetic resin film is melted and removed, and at the same time, the synthetic resin film can be cut.

Therefore, according to the present invention, since the work of forming the margin portion for removing the metal film and the work of cutting the synthetic resin film can be simultaneously performed in the same step, the productivity can be improved. Also, the cutting position can be prevented from shifting.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a side view of a kaleidoscope and a condenser lens showing another embodiment of the present invention.

FIG. 4 is an explanatory view of the intensity distribution of laser light emitted from the kaleidoscope.

FIG. 5 is a perspective view of a conventional laser processing apparatus.

FIG. 6 is a perspective view showing a state where a film having a margin portion is similarly cut by a cutter.

FIG. 7 is a perspective view showing a state where two conde films are wound up.

8 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 ... Synthetic resin film, 2 ... Metal film, 21 ... Holder, 2
4 ... Callide scope, 24a ... Translucent part, 24b ... Scattering part (attenuating part), 25 ... Condensing lens, 26 ... Optical fiber,
27 ... Laser generator, 28 ... Cutter, 28a ... Blade edge.

Claims (2)

[Claims] 1. A laser processing apparatus for removing a metal film laminated on a synthetic resin film with a predetermined width dimension and cutting a portion of the synthetic resin film from which the metal film has been removed. And an optical fiber on which the laser light output from this laser generator is incident, and the intensity distribution of the laser light from this optical fiber are made uniform and
Callide-scoring that shapes the cross section of the light into a nearly square shape
Cup, a holder for holding the callide scope, a condenser lens for holding laser light emitted from the callide scope, which is held in the tip of the holder, and a cutting edge for the tip of the holder. A cutter provided at substantially the same height as the focus position of the condenser lens, and a scanning means for relatively scanning the synthetic resin film and the condensed laser light are provided. And laser processing equipment. 2. A laser processing apparatus for removing a metal film laminated on a synthetic resin film with a predetermined width dimension and cutting a portion of the synthetic resin film from which the metal film is removed. And an optical fiber on which the laser light output from the laser generator is incident, and one end surface of which is optically connected to the optical fiber to make the intensity distribution of the laser light from the optical fiber uniform. And a condenser lens for shaping the laser light into a substantially rectangular cross-sectional shape, a condenser lens for condensing the laser light emitted from the kaleidoscope, and the condensed laser light. And scanning means for relatively scanning the synthetic resin film with each other, and an attenuating portion formed in the center portion of the other end surface of the kaleidoscope to leave a band-shaped light transmitting portion along the scanning direction except the light transmitting portion. And attenuating section Is a laser processing device, wherein the condensed laser light attenuates the laser light to such an intensity that the metal film is removed and the synthetic resin film is not cut.