JPS60213393A - Cutting method of plastic material by using laser light - Google Patents

Abstract

PURPOSE:To obtain a smooth cut surface by blowing gaseous ozone, etc. to the cut part while irradiating laser light thereon thereby decreasing formation of soot and preventing flaming up of the cut surface. CONSTITUTION:The laser light 3 is irradiated on an arom. plastic material 1 such as an epoxy substrate or phenolic substrate, by which said material is cut. The gaseous ozone 9 or a gaseous mixture formed by mixing the prescribed amt. of an inert gas with the gaseous ozone is blown to the cut part of said plastic material 1 while the laser light 3 is irradiated thereon. The generation of black soot and further flaming up of the cut surface are thus prevented and the smooth cut surface is obtd.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to cutting of plastic materials using a laser beam.
Regarding the method, the present invention relates to a method for cutting aromatic materials such as epoxy boards and phenol boards.

[Prior art]

As a conventional method for this purpose, a case will be described in which, for example, a laser processing apparatus shown in FIG. 1 is used.

In the figure, (1) is, for example, vinyl chloride resin (hereinafter referred to as vinyl chloride resin).

PVC), (2) is a condensing lens that condenses the laser beam (3) from a laser oscillator (not shown), 14+FiAr gas, (5) is a nozzle,
It is configured to spray Ar gas (4) onto the plastic material +11.

In this device, the laser beam (3) focused to a spot diameter smaller than the condenser lens 121K is
Irradiate the cut part of 1. At the same time, Ar gas (4)
is irradiated from the nozzle (5) to the cut part of the plastic material (tl) and its surroundings, and in addition to the heat of the laser beam 13, Ar
The plastic material +11 is cut by the heat of reaction between the gas (4) and the plastic material (1). However, when cutting the plastic material fil made of aromatic epoxy substrate or phenol plate using this method, the plastic material As shown in Fig. 2, the cutting point Vi in (]) is K. The figure shows a cross section of the plastic material Txl. Overall, black soot (7) due to carbide is heavily formed on the cut surface (6), and the cutting direction is A large heat shadow layer (8) was formed around the cut surface (6), and a large amount of burnt gas was often generated on the cut surface (6).
) is required, which increases the number of man-hours and increases cutting costs, significantly impairing the practicality of laser beam cutting.

Even if PVC is cut using the above device 5, the cut surface (6)
The formation of a smooth black surface (7) was not observed, and the reason for this is thought to be as follows. PVC is aliphatic and has thermoplastic properties. The main bond between carbon and carbon due to combustion is cut off at a relatively low temperature of about 400°C, and it melts and volatilizes as 002, H2O, etc. Therefore, even among epoxy substrates, if they are aliphatic, no soot (7) will remain.On the other hand, in plastic materials +I+ made of aromatic epoxy substrates or phenol plates, benzene (7) will remain due to combustion. The main knowledge between filler and carbon is the same as in aliphatic systems.1
It is cleaved near c400'c, but the benzene ring remains as it is.

This bond of the benzene ring is not easily cleaved near the bond #'jaoo°C, and moreover, it is polymerized, making it even more difficult to cleave. Temperature of plastic material to (
1) Cut plane (61 carbide weight) 8' 3rd
As shown in the figure. A temperature distribution occurs at the cut surface 161 K due to the heat of the laser beam (3), and from the characteristics shown in Figure 3, the cut surface +6
A black soot-like residue is left behind due to carbide, which is thought to be a polymerized form of 1 K H benzene rings. When cutting the material (1), black soot (71) is generated intensely on the cut surface (6), and a thick heat shadow 1 appears around the cut surface + 61, and sometimes the cut surface (6) is burnt. There were drawbacks such as the occurrence of uphill climbs.

[Summary of the invention]

This invention was made to eliminate the drawbacks of the conventional methods as described above, and by spraying ozone onto the cut parts of plastic materials together with laser light irradiation, aromatic materials such as epoxy boards and phenol boards can be removed. Even when cutting plastic materials, this laser reduces soot production, lowers the heat forming l# layer, and prevents burning of the cut surface, resulting in a smooth and beautiful cut surface. The purpose is to provide a method for cutting plastic materials using light.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. Fourth
As shown in the figure, a laser beam (3) is irradiated onto a cut portion of an aromatic plastic material f11 containing, for example, a benzene ring, in a process similar to the conventional method.

In the figure, (9) is ozone (03), and laser light (3)
It is also sprayed on the cut part of the plastic llt+ and its surroundings.

Plastic material fllK: When irradiated with laser light (3).

The main chain is severed by the high energy of the laser beam. Furthermore, when extremely active 03(9) is sprayed from Nomel (5) onto the region of plastic material +11 which is heated to a high temperature, even the bond of the benzene ring is not cut. Therefore, the multimerization of benzene rings can be reduced, and the generation of soot and the appearance of a heat sink layer can be reduced. Furthermore, the cut surface +6) is prevented from burning up, and as shown in FIG. 5, which shows the cross section (2) of the plastic material (1) after cutting, a smooth and brittle cut surface (6) can be obtained.

In addition, although only Keo3 was sprayed in the above example, 03
VCAr, N2. Even when spraying a mixture of a predetermined amount of He and other inert gases, soot production is reduced.
The same effects as in the above embodiment can be obtained.

[Effects of the Invention] As described above, according to the present invention, a plastic material is cut by irradiating it with a laser beam.

By spraying ozone onto the cutting section of plastic material along with laser light irradiation, soot production can be reduced even when cutting aromatic plastic material.

This has the effect of providing a cutting method using a laser beam that can prevent flare-ups and obtain a smooth and beautiful cut surface.

[Brief explanation of the drawing]

FIG. 1 is a 911+ side view showing a laser processing device for a conventional method of cutting plastic materials using a laser beam. Figure 2 is a cross-sectional view showing the plastic material cut by this device, and Figure 3 is the temperature ('
Figure 4 is a side view showing a device using the cutting method according to an embodiment of the present invention; This is a cross section showing a plastic material. (1)...Plastic material, (31...Laser light,
(9)...Ozone In Figure 1, the same reference numerals indicate the same or corresponding parts +O Agent Masataka Oiwa Figure 1 Figure 2 Figure 4 Figure 5 Procedure amendment IF (spontaneous) 2. Title of the invention Method for Cutting Plastic Materials Using Laser Light 3, Relationship with the Amendment Case Patent Applicant Address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name
(601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent 6 Contents of amendment (1) Next to “at the same time” on page 2, line 10 of the specification K [-
Fully insert the plastic material (11+) in order to prevent the scattered matter from the cut part from concentrating on the surface of the glass (2) and to prevent the cut part of the plastic material (11+ from oxidizing and burning.) 21 Same page 2, lines 12 to 14 [, laser beam (3
In addition to the heat of 1, Ar gas (41) and plastic material (
1) by the heat of reaction with, etc." is deleted. that's all

Claims (1)

[Claims] +11 A method for cutting a plastic material by irradiating it with a laser beam, characterized in that ozone is sprayed onto the cut portion of the plastic material at the same time as the irradiation of the laser beam. (2) A method for cutting a plastic dog using a laser beam according to claim 1, characterized in that: (2) a predetermined pair of inert gases are mixed with ozone.