KR20030096682A - a crash-pad of car and a manufacturing process thereof - Google Patents

Abstract

PURPOSE: A crash pad for a vehicle and a manufacturing method thereof are provided to reduce the manufacturing cost and the assembly process without the installation of an air bag door at a crash pad. CONSTITUTION: An air bag module(24) for a vehicle is displaced in a crash pad(22). A laser beam is radiated onto a lower portion of the crash pad to form a plurality of development holes(36) as to develop the air bag module in a certain pressure. The development holes are formed in certain intervals from the lower portion of the crash pad with different depths by the laser beam to arrange the development holes among same depth portions in a repetition manner.

Description

Crash-pad of car and a manufacturing process

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crash pad and a manufacturing process of an automobile, and more particularly, to laser scoring in a predetermined shape on a crash pad in which an airbag module mounted on a passenger seat is located in a crash pad installed inside an automobile. The present invention relates to a crash pad of an automobile in which the airbag door does not need to be separately mounted by varying the depth of the deployment hole formed in the treatment.

In general, there are many safety devices for automobiles. Among them, airbag modules are safety devices that greatly affect the lives of drivers and passengers.

In particular, the passenger air bag (PAB) is to protect the safety of the passenger in the event of a crash, usually to form a deployment groove 6 in the crash pad (2) is installed inside.

This passenger airbag (not shown) is mounted on an airbag module (not shown) installed inside the crash pad 2, and on the crash pad 2 corresponding to the front of the airbag module. The deployment groove 6 is formed.

Then, the airbag door 8 is mounted on the deployment groove 6 to be used.

The deployment groove 6 is formed in various shapes such as a circle or a polygon, and the airbag door 8 is formed to fit the deployment groove 6 so that the passenger's airbag is deployed at the expansion pressure according to the volume expansion due to the collision of the vehicle. The door will be broken.

However, since the deployment grooves and the airbag doors must be formed on the crash pads so that the airbags are deployed, there is a problem in that the work process is complicated and the assembly takes a long time, resulting in a decrease in productivity.

The present invention devised to solve this problem is to score (scoring) with a laser beam on the bottom surface of the crash pad is located in the airbag to vary the depth of the development hole is formed at this time so that all deployment holes are not damaged in a small impact. For the purpose.

1 is a perspective view of a crash pad provided with a conventional airbag door.

Figure 2 is a front sectional view showing a development hole of the crash pad according to the present invention.

3 is a planar main view of the crash pad according to the present invention;

4 is a cross-sectional view taken along line III-III of FIG. 3;

* Description of the symbols for the main parts of the drawings *

2,22: Crash Pad 6: Unfolding Groove

8: airbag door 24: airbag module

25: airbag 32: skin layer

33: foam layer 34: core layer

36: opening hole 38: first opening hole

39: second development hall

The crash pad of the vehicle according to the present invention described above is installed so that the airbag module for the vehicle is located inside the crash pad, and the laser scoring while irradiating a laser beam to the lower portion of the crash pad so that the airbag module is deployed by a constant pressure. In the crash pad of an automobile which forms a plurality of development holes by treatment, the development holes are continuously formed at a predetermined interval to a different depth by the laser beam at the lower portion of the crash pad, and the development holes having the same depth. By repeatedly arranging each other, the above-described object can be achieved.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention will be described in more detail.

2 is a front sectional view showing a development hole of a crash pad according to the present invention, FIG. 3 is a plan view of a main portion of the crash pad according to the present invention, and FIG. 4 is a cross-sectional view taken along line III-III of FIG.

Components that are the same as or similar to those of the prior art are given the same or similar names, and detailed descriptions thereof will be omitted.

2 and 4, the crash pad of the vehicle according to the present invention is installed so that the vehicle airbag module 24 is located inside the crash pad 22, the airbag module 24 is a constant pressure The crash pad 22 of the automobile which forms a plurality of deployment holes 36 by laser scoring while irradiating a laser beam to the lower portion of the crash pad 22 so as to be developed by the laser beam. In this case, the deployment holes 36 are continuously formed at predetermined intervals at different depths by the laser beam under the crash pad 22, and the deployment holes 38 and 39 of the same depth are repeatedly arranged. It is characterized by.

In addition, the crash pad manufacturing process of the automobile includes irradiating the laser beam to the lower surface of the crash pad in a predetermined number of times within a range of 350 to 2500W of power and forming the deployment hole.

As shown in FIG. 2, the airbag module 24 is configured to penetrate the crash pad 22 by its deployment pressure as it is deployed by a signal sensed at the time of collision of the vehicle.

In this case, the crash pad 22 may include a core layer 34 forming an inner surface of the crash pad 22, a foam layer 33 in close contact with an upper portion of the core layer 34, and It is composed of a skin layer 32 in close contact with the top of the foam layer 33 to form the outer surface of the crash pad 22.

The lower surface of the crash pad 22 is subjected to laser scoring as much as the deployment portion of the airbag 25.

At this time, a plurality of development holes 36 are formed on the bottom surface of the crash pad 22 while maintaining a predetermined distance by the laser scoring process.

As shown in FIG. 3, the deployment hole 36 has a predetermined shape. In the present invention, the development hole 36 may be formed to form a trajectory of a 'c' shape, a 'ㅁ' shape, and a 'o' shape. The airbag module 24 is formed within a range of 2 to 10 mm.

As shown in FIG. 4, the depths of the deployment holes 36 are different from each other.

That is, the development hole 36 is the first development hole 38 formed by laser scoring to the predetermined depth of the skin layer 32 in the core layer 34, and the foam layer in the core layer 34 And a second development hole 39 formed by laser scoring to a predetermined depth of (33).

In order to vary the depths of the first and second development holes 38 and 39, it is preferable to adjust the irradiation amount and the number of irradiation times of the laser beam.

In this case, the number of the first and second development holes 38 and 39 is preferably less than ten, and the second development holes 39 are formed to be arranged after the first development hole 38.

In other words, the first development hole 38 is scored by a laser beam so as to be formed in a range of one to ten as necessary, and one second development hole 39 is continuously formed as necessary. It is formed to be formed by a scoring process in the range between ten.

On the other hand, the material of the core layer 34 is composed of any one of polypropylene resin (PP), thermoplastic resin (ABS), poly carbonine resin (PC), and polyamide resin (PA).

In addition, the material of the foam layer 33 is composed of any one of polypropylene-based resin (PP) and polyurethane-based resin (PU).

On the other hand, the polypropylene resin is to be composed of a mixture of glass fiber (GF) and talc (Talc).

In addition, the material of the skin layer 32 is polyvinyl chloride resin (PVC), thermoplastic resin (ABS), thermoplastic polyurethane resin (TPU), thermoplastic polyolefin resin (TPO) and polyurethane resin (PU) It consists of either element.

In addition, the development hole 36 is preferably adjusted in a manufacturing process so as to be formed by irradiating the laser beam within 1 to 50 times.

That is, the first development hole 38 of the deployment hole 36 irradiates a laser beam within a range of 1 to 50 times, and thus, the skin layer 32 of the layers 32, 33, and 34 of the crash pad 22 described above. The manufacturing process is carried out to form

In addition, the second development hole 39 of the development hole 36 is irradiated with a laser beam within a range of 1 to 50 times to perform the manufacturing process so as to form the foam layer 33 of the crash pad described above.

At this time, the number of irradiation times of the laser beam irradiated to form the first deployment hole 38 is less than the number of irradiation times of the laser beam irradiated to form the second deployment hole 939.

Hereinafter, an embodiment of the present invention having the above configuration will be described in detail.

The development holes 36 are formed to be separated by a predetermined distance, so that the narrower the gap therebetween, the easier it is to be separated from the crash pad 22. Irradiate the laser beam.

In addition, the diameter of the deployment hole 36 is formed in the range of 0.12 to 0.7mm.

At this time, the deployment hole 36 is to be formed along a circular shape, but may also form a deployment hole 36 to form a circle along the circular trajectory, but the deployment hole 36 is not formed in a part of the circular trajectory so that the airbag ( 25) It is desirable to allow the crash pad 22 to hinge upon deployment.

In addition, the deployment hole 36 is formed to be drilled by the deployment pressure of the airbag 25 which is inflated in the range of 2,500 to 3,500N.

Meanwhile, the core layer 34 has a thickness of 2 to 4.5 mm based on the inner surface of the crash pad 22.

The thickness of the foam layer 33 is 4 to 8 mm based on the upper surface of the core layer 34, and the thickness of the skin layer 32 is 0.5 based on the upper surface of the foam layer 33. To 1.2 mm.

In addition, the first development hole 38 is subjected to laser scoring process to the depth of 0.275 to 1.08mm from the lower surface of the skin layer 32, the second development hole 39 in the lower portion of the foam layer 33 Allow laser scoring to a depth of 0.5 to 7.7 mm.

In this case, the first development hole 38 is formed by irradiating the power to 350 to 2500W and the laser beam within a range of 1 to 50 times, and the second development hole 39 is set to 350 to 2500W. It is formed by irradiating the laser beam within the range of 1 to 50 times.

As described above, according to the crash pad of the vehicle, since the airbag door is not installed in the crash pad, the manufacturing and assembly process can be reduced.

In addition, by varying the depth of the development hole formed by scoring the laser beam on the lower surface of the crash pad there is an effect that does not break below a certain development pressure.

Claims (13)

An automobile airbag module is installed to be located inside the crash pad, and an automobile scoring system is formed by irradiating a laser beam to a lower portion of the crash pad so as to deploy the airbag module by a constant pressure to form a plurality of deployment holes. In crash pad of The development hole is a crash pad of the vehicle, characterized in that the successive holes are formed at a predetermined interval to a different depth by the laser beam at the lower portion of the crash pad, the deployment holes of the same depth are arranged repeatedly. The method of claim 1, The distance between the center of each of the deployment hole is a crash pad of the vehicle, characterized in that formed within the range of 0.7 to 1.5mm. The method of claim 1, The diameter of the deployment hole is a crash pad of the vehicle, characterized in that formed in the range of 0.12 to 0.7mm. The method of claim 1, The deployment hole is a crash pad of the vehicle, characterized in that the incision by the airbag module volume expansion in the range of 2,500 to 3,500N. The method of claim 1, The crash pad may include a core layer forming an inner surface of the crash pad; A foam layer in close contact with the top of the core layer; The crash pad of the vehicle, characterized in that the skin layer is in close contact with the top of the foam layer to form the outer surface of the crash pad. The method of claim 5, The thickness of the core layer is 2 to 4.5 mm based on the inner surface of the crash pad; The thickness of the foam layer is 4 to 8 mm based on the top surface of the core layer; The thickness of the skin layer is a crash pad of the vehicle, characterized in that 0.5 to 1.2mm based on the upper surface of the foam layer. The method according to claim 1 or 5, The development hole may include a first development hole formed by laser scoring from the core layer to a predetermined depth of the skin layer; The crash pad of the vehicle, characterized in that consisting of the second development hole formed by the laser scoring process from the core layer to a predetermined depth of the foam layer. The method of claim 7, wherein The first development hole is laser scored to a depth of 0.275 to 1.08 mm at the bottom surface of the skin layer; The second development hole is a crash pad of the vehicle, characterized in that the laser scoring process to the depth of 0.5 to 7.7mm in the lower portion of the foam layer. The method of claim 5, The material of the core layer is formed of any one of polypropylene resin, thermoplastic resin, polycarbonine resin and polyamide resin; The material of the foam layer is formed of any one of polypropylene resin and polyurethane resin; The material of the skin layer is a crash pad of a vehicle, characterized in that formed of any one of polyvinyl chloride resin, thermoplastic resin, thermoplastic polyurethane resin, thermoplastic polyolefin resin and polyurethane resin. The method of claim 7, wherein The crash pad of the vehicle, wherein the first and second development holes are formed in ten or less, respectively, so that the second development holes are arranged after the first development hole. An automobile airbag module is installed to be located inside the crash pad, and an automobile scoring system is formed by irradiating a laser beam to a lower portion of the crash pad so as to deploy the airbag module by a constant pressure to form a plurality of deployment holes. In crash pad of And irradiating the laser beam to the lower surface of the crash pad at a predetermined number of times within a range of 350 to 2500 W of power to form the deployment hole. The method of claim 11, The development hole is a crash pad manufacturing process of a vehicle is formed by irradiating the laser beam within 1 to 50 times. The method of claim 11, The development hole may include at least one first development hole formed up to a skin layer forming an outer surface of the crash pad by irradiation of the laser beam, and at least one agent formed up to a foam layer in contact with a bottom surface of the skin layer of the crash pad. 2 Crash pad manufacturing process for automobiles with the development holes arranged at regular intervals.