JPS6245490A - Cutting method for synthetic resin material - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the external appearance quality of the body to be worked due to the product adhesion and the aggravation of the environment due to the dispersion by cutting with removing the melted product of the body to be worked with its suction in case of cutting the other layer leaving the lowest layer of the laminated body of the synthetic resin material. CONSTITUTION:Only the skin material Wa composed of a synthetic resin and the skin material Wa of the laminated body composed of a foamed material Wb and core material Wc or only the skin material Wa and foamed material Wb is cut by the irradiation of a laser Y. In this case, the air close to the irradiation port 2a is sucked by the reduced pressure suction F of a suction passage 4 and the cut product M is forceibly sucked by the suction flow Fa thereof. The external appearance deterioration due to the adhesion to the body to be worked of the product M is prevented and the aggravation of the working environment due to the peripheral dispersion is prevented. The suction may be performed by arranging a suction nozzle at the side part of the irradiation port.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutting method in which a workpiece made of a laminate of synthetic resin materials is irradiated with a laser beam and cut by fusing. Among the workpieces made of laminates,
The present invention relates to a method for cutting a synthetic resin material in which at least the bottom layer is left intact and products generated when cutting other layers are fused and cut while being sucked and removed.

[Conventional technology]

Conventionally, when a workpiece made of a low-melting point material such as a synthetic resin material is irradiated with a laser beam and cut by fusing, a laser processing device 50 as shown in a schematic cross-sectional view of FIG. 4 is used to perform the processing. ing.

That is, a processing lens 52 fixed inside the cylindrical head body 51 focuses the laser beam 53 and irradiates the surface of the workpiece W with the laser beam 53, which is formed on the side of the head body 51. By ejecting the assist gas 55 supplied from the supply path 54 from the nozzle 56 coaxially with the laser beam 53, products such as resin gas and molten material heated by the laser beam 53 are transferred to the back side of the workpiece W. It is blown away and cut.

[Problem that the invention seeks to solve]

However, in such laser processing equipment,
As shown in FIG. 5, when the workpiece W is a laminate consisting of a skin material Wa, a foam material wb, and a core material Wc, the laser beam 53 is applied only to the skin material Wa or only to the skin material Wa and the foam material wb. When irradiating and fusing, products M such as resin gas and melt that are heated together with the assist gas 55 during fusing blow back onto the surface of the workpiece W, causing damage to the skin material Wa around the fusing process. Not only does it adhere to the surface and significantly deteriorate the appearance quality, but also the product M with odor is scattered around by the assist gas 55 ejected from the nozzle 56, causing a problem of deteriorating the environment.

Therefore, this invention was made to solve the above-mentioned problems, which occur when cutting the other layers while leaving at least the bottom layer of a workpiece made of a laminate of synthetic resin materials. By fusing and cutting while absorbing and removing the products, the purpose is to prevent deterioration of appearance quality and environmental deterioration due to the products during fusing.

[Means for solving problems]

That is, in the method for cutting a synthetic resin material according to the present invention, a workpiece made of a laminate of synthetic resin material is heated and melted while being irradiated with a laser beam to cut it.
When cutting the other layers of a workpiece consisting of an I-layer while leaving at least the bottom layer, the workpiece is melted and cut while removing products generated at the melted part of the workpiece by suction. .

As a method of suctioning and removing the products generated at the melting part of the workpiece, a direct suction mechanism is installed in the irradiation nozzle that irradiates the workpiece with laser light, and the products generated during cutting are removed by suction. Direct suction removal using an irradiation nozzle, and a suction nozzle connected to a suction mechanism that is separate from the irradiation nozzle that irradiates the workpiece with laser light, and products generated during fusing are removed indirectly and separately from the irradiation nozzle. Any method of suction removal may be employed.

In addition, regarding the suction air volume of products generated during fusing, in both the former direct suction removal method and the latter indirect suction removal method, the air volume is reduced if the distance between the workpiece and the irradiation nozzle or suction nozzle is short; It is desirable to increase the number.

Specifically, as shown in Figure 3, if the distance between the workpiece and the irradiation nozzle or suction nozzle is 1 gm, the
It is preferable to set it to m'/min or more, and when the distance between the workpiece and the irradiation nozzle or the suction nozzle is 5 mm, it is preferable to set it to 0.12 m3/min or more.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

(First Example) FIG. 1 is a schematic cross-sectional view showing a first example of the method for cutting a synthetic resin material according to the present invention.

In FIG. 1, 1 is a laser processing device, and this laser processing device 1 includes a cylindrical head body 2 with a tapered tip, and a processing lens fixed above the head body 2. 3, and a suction path 4 formed below the processed lens 3 of the head body 2 and connected to a suction device (not shown) such as a vacuum pump, and the tip of the head body 2 is connected to the irradiation port 2a. It becomes.

Then, the CO2 laser beam Y introduced into the head body 2
is focused by the processing lens 3 and becomes CO2 laser light Ya with good energy distribution, which passes through the irradiation port 2a to the vinyl chloride skin material W a % urethane foam material Wb and A
The workpiece W made of the SG core material Wc is irradiated, and the air F in the head body 2 is suctioned from the suction path 4 to create a suction flow Fa from the outer periphery of the irradiation port 2a toward the suction path 4. is starting to form.

Then, among the workpiece W consisting of a skin material W a with a thickness of 11 negative, a foam material wb with a thickness of 2 fl, and a core material Wc with a thickness of 2 fl, the skin material Wa and the foam material w are removed, leaving the core material Wc.
When trimming by fusing b, use the laser processing device 1
The head body 2 is placed above the workpiece W, and the distance between the irradiation port 2a of the head body 2 and the workpiece W is set to l.
Hold it so that it is mm.

In this state, L150 has no output of 100 in the head body 2.
CO of W and laser light Y are introduced and passed through the processing lens 3. At this time, the CO2 laser beam Ya that has passed through the processing lens 3 is condensed when passing through the processing lens 3, and the CO2 laser beam Ya that has been shaped to have a good energy distribution,
The laser beam becomes Ya.

Next, the shaped CO2 laser beam Ya is irradiated from the irradiation port 2a toward the workpiece W, and the focus of the CO2 laser beam a is connected to the boundary area between the foam material Wb and the core material We of the workpiece W. . At the same time, the suction device is operated to suction the air F inside the head body 2 from the suction path 4, and the air volume is 0.1 m'/mi from the outer periphery of the irradiation port 2a toward the suction path 4.
n suction flow Fa is formed, and the head main body 2 is
Move in the trimming direction at a speed of m/min.

At that time, due to the heat of the irradiated CO2 laser beam Ya,
The skin material Wa and the foam material wb are melted and cut, and products M such as resin gas and tar-like melt generated during the cutting are collected at the melted part of the workpiece W.

On the other hand, at the same time as the workpiece W is irradiated with the CO2 laser beam Ya, a suction flow Fa is formed from the outer periphery of the irradiation port 2a of the head body 2 toward the suction path 4, and the The product M that accumulates in a band is sucked together with the surrounding air, passes through the inside of the head body 2, and is guided from the suction path 4 to the suction device, thereby preventing the product M from sticking due to the band.

When trimming is completed by cutting the skin material Wa and the foam material wb, the introduction of the CO2 laser beam Y into the head body 2 and the formation of the suction flow Fa are stopped, and the head body 2 is removed from above the workpiece W. alienate

(Second Embodiment) FIG. 2 is a schematic sectional view showing a second embodiment of the method for cutting a synthetic resin material according to the present invention.

In FIG. 2, 11 is a laser processing device, and this laser processing device 11 includes a cylindrical head body 12 having a tapered tip, and a processing lens fixed above the head body 12. 13 and an assist gas G supply path 14 formed below the processing lens 13 of the head body 11, and the tip of the head body 12 serves as an irradiation port 12a.

Then, the C○2 laser beam Y introduced into the head body 12
is condensed by the processing lens 13 to become CO2 laser light Ya with good energy distribution, which is emitted from the irradiation port 12a to the workpiece made of vinyl chloride skin material Wa, urethane foam material Wb, and ASG core material Wc. At the same time, assist gas G is supplied from the supply path 14 into the head main body 12 and ejected from the irradiation port 12a toward the workpiece vIJW along with CO and the laser beam Ya.

On the other hand, near the irradiation port 12a of the head body 12, a cylindrical suction nozzle 15 with a tapered tip is disposed obliquely, and one end is connected to a suction nozzle such as a vacuum pump. It is connected to a device (not shown), and the other end is a suction port 15a. Then, when the suction device operates, the air F in the suction nozzle 15 is suctioned, and the suction port 15a
A suction flow Fa is formed toward the suction device from the outer periphery of the suction device.

Then, the skin material Wa has a thickness of 111, and the foam material has a thickness of 2.
When cutting and trimming the skin material Wa and the foam material wb by leaving the core material Wc and leaving the core material Wc of a workpiece W made of a core material Wc of 2n and a thickness of 2n, the head main body 12 of the laser processing device 11 is It is placed above the workpiece W, and the distance between the irradiation port 12a of the head body 12 and the workpiece W is set to 3.
It is held so that it becomes 1111. After that, suction nozzle 1
5 is disposed near the head main body 12, and the distance between the suction port 15a of the suction nozzle 15 and the workpiece W is maintained to be one square.

In this state, the head body 12 has an output of 100 to 15
0W CO and laser light Y are introduced and passed through the processing lens 13. At this time, the CO and laser beam Ya that has passed through the processing lens 13 is condensed and shaped into a CO2 laser beam Ya that has a good energy distribution.

Next, the shaped CO2 laser beam Ya is irradiated from the irradiation port 12a toward the workpiece W, and the focus of the CO2 laser beam Ya is connected to the boundary between the foam material wb and the core material Wc of the workpiece W. At the same time, assist gas G is supplied from the supply port 14 provided on the side of the head body 12, and is ejected from the irradiation port 12a of the hend body 12 coaxially with the CO2 laser beam Ya, and the suction device is activated. The air F is sucked from the suction nozzle 15, and the air volume is 0.1 m'/
A suction flow Fa of min is formed.

Next, the head main body 12 and the suction nozzle 15 are separated by 7 m.
”/min in the trimming direction.At this time, the & skin material Wa and foam material wb are melted and cut by the heat of the irradiated CO2 laser beam Ya, and at the same time, the Products M such as resin gas and tar-like melt are blown up onto the surface of the workpiece W by the assist gas G.

On the other hand, at the same time as the workpiece W is irradiated with the CO2 laser beam Ya, a suction flow Fa is formed by the suction nozzle 15, and the product M that has blown up onto the surface of the workpiece W flows from the suction port 15a into the surrounding area. It is sucked together with air, passes through the inside of the suction nozzle 15, and is guided to the suction device, thereby preventing the product M from adhering.

Then, when the trimming is completed by cutting the skin material Wa and the foam material wb, the C0 to the head body 12 is
2, the introduction of the laser beam Y and the supply of the assist gas G are stopped, and the operation of the suction device is also stopped to stop the formation of the suction flow Fa, and the head main body 12 is separated from above the workpiece W.

Note that in the first and second embodiments, C
Although the description has been made regarding fusing by irradiation with the O It may be light, helium-neon laser light, krypton laser light, argon laser light, H2 laser light, N, or laser light.

〔Effect of the invention〕

As explained above, in the method for cutting synthetic resin materials according to the present invention, the back side of the workpiece made of a laminate of synthetic resin materials is Since the melt cutting is performed while removing the products by suction, it is possible to prevent deterioration of the appearance quality due to the products generated during melt cutting.

In addition, in the method for cutting synthetic resin materials according to the present invention, the products generated when cutting the workpiece can be sucked and removed, thereby preventing the products from scattering around the environment. It has the effect of preventing deterioration.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of the method for cutting a synthetic resin material according to the present invention. FIG. 2 is a schematic cross-sectional view showing a second embodiment of the method for cutting synthetic resin materials according to the present invention. FIG. 3 is a diagram showing the suction air volume in the synthetic resin material cutting method according to the present invention. FIG. 4 is a sectional view for explaining a conventional laser processing device. FIG. 5 is a cross-sectional view illustrating a conventional laser cutting method. l, 11--1--Laser processing device 2.12--Head main body 2a, 12 a--1 irradiation port 3.13--Processing lens 4--1.Suction path 15--Suction nozzle 15 a--Suction port Fa-----Suction flow M-m--Product applicant Toyota Motor Corporation Fig. 1! Figure 2 Suction M! ('m'/m ln) Figure 3 Figure 4

Claims (1)

[Claims] When cutting a workpiece made of a laminate of synthetic resin material by heating and melting it while irradiating it with laser light, leaving at least the bottom layer of the workpiece made of a laminate while cutting the other layers. A method for cutting a synthetic resin material, characterized in that cutting is carried out while sucking and removing products generated at a melting part of a workpiece.