JP2001171042A - Trim part for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable recycling of trim parts for a car obtained by integrating a board core material, a pad material and a skin material using high frequency welder processing. SOLUTION: A high frequency weldable polyolefinic resin foam is used as a pad material 30 and a high frequency weldable polyolefinic resin sheet is used as a skin material 40 and high frequency welder processing is applied to a board core material 20, the pad material 30 and the skin material 40 to inexpensively manufacture trim parts 10,100. Further, a polyolefinic resin is used in both of the pad material 30 and the skin material 40 to collectively and simply perform recycling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile interior part such as an automobile door trim, and more particularly to an automobile interior part suitable for recycling.

[0002]

2. Description of the Related Art Normally, various vehicles are equipped with interior parts for the purpose of improving interior beauty and protecting occupants. For example, as shown in FIG. A door trim 1 of a half trim type for a vehicle, which is installed downward from a part, is used.

As shown in FIG. 13, this automotive door trim 1 is made of a polyurethane foam having a cushioning property on the surface of a board core material 2 such as a flat hard board having shape retention and rigidity for mounting to a vehicle body panel. Pad material 3 and a skin material 4 made of a vinyl chloride resin sheet
Are laminated, and the board core material 2, the pad material 3, and the skin material 4 are manufactured by integrating the three members along a desired pattern 1a by high frequency welding.

[0004]

As described above, the simple half-trim type door trim 1 for automobiles has the advantage of being excellent in mass productivity and inexpensive in manufacturing cost by using high-frequency welding. However, since it is necessary to use a material capable of high-frequency welding, for example, the pad material 3 is impregnated with a polyvinyl chloride resin as a high-frequency welding aid in a polyurethane foam. The fact is that a vinyl chloride resin sheet that can be easily welded is used as the skin material 4.

[0005] Therefore, it has been pointed out that since vinyl chloride resin and polyurethane are used, they cannot be recycled and resources cannot be effectively used.

Further, as a recent trend, in order to protect the environment from the dioxin problem and the like, the use of vinyl chloride resin has been reviewed, and there is an urgent need to develop a material that can replace vinyl chloride resin.

The present invention has been made in view of such circumstances, and it is possible to apply high-frequency welding, which is excellent in mass productivity, to manufacture inexpensive interior parts for automobiles, and it is particularly suitable for recycling. The purpose of the present invention is to provide interior parts for automobiles that enable effective use of resources.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a pad material made of a polyolefin resin foam capable of high-frequency welding is laminated on the surface of a board core material. Further, a skin material made of a polyolefin resin sheet capable of high-frequency welding is placed on the upper side, and the board core material, the pad material, and the skin material are integrated by high-frequency welding.

Here, as a board core material, a hard board, a wood fiber board or the like can be applied, as long as it has shape retention and appropriate rigidity. The pad material is premised on using a polyolefin-based resin foam as a base in consideration of recycling. Examples of the polyolefin-based resin foam include a polyethylene foam and a polypropylene foam.

The above-mentioned polyolefin resin foam itself has low weld polarity and is not suitable for high frequency welding, but ethylene-vinyl acetate copolymer (hereinafter referred to as EV) is used.
Welding aid such as A resin) or acrylic resin may be mixed, or this kind of welding aid may be entirely or partially coated.

Further, it is premised that a polyolefin resin sheet is used as the skin material, and that the thermoplastic resin olefin (T
PO), polypropylene (PP) resin, and the like. The polyolefin resin sheet also has a small weld polarity, and therefore, a weld aid such as an EVA resin or an acrylic resin is added and mixed into these polyolefin resins.

Therefore, according to the first aspect of the present invention,
A high-frequency weldable polyolefin-based resin foam is used as the pad material, and a high-frequency weldable polyolefin-based resin sheet is also used as the skin material. Can be integrated by high frequency welding.

Further, since the pad material and the skin material are based on a polyolefin resin material and do not use a conventional vinyl chloride resin sheet or polyurethane, the pad material with the skin material is simply peeled off from the board core material. In addition, it can be easily recycled, and is environmentally advantageous because it does not use a vinyl chloride resin.

According to a second aspect of the present invention, a decorative sheet material in which a backing material made of a polyolefin resin sheet capable of high-frequency welding is lined on the back surface of the cloth is interposed between the pad material and the skin material. The board core material, the pad material, the decorative sheet material, and the skin material are integrated by a high frequency welding process along a desired weld pattern including the peripheral line of the inscribed portion, and the welded weld portion of the peripheral portion of the inscribed portion. The cut is performed on the skin material along the line, and the skin material corresponding to the inscribed portion is removed to expose the cloth of the decorative sheet material to the surface.

Here, as the decorative sheet material, a material obtained by backing a polyolefin resin sheet capable of high-frequency welding on the back surface of the cloth is used. The same material as the skin material is used as the polyolefin resin sheet capable of high-frequency welding. Materials such as thermoplastic olefin (TPO) and polypropylene (PP) resin
A resin sheet material to which a welding aid such as A resin or acrylic resin is added and mixed can be used.

Therefore, according to the second aspect of the present invention,
After the board core material, pad material, decorative sheet material, and skin material are integrated by welding, the skin material corresponding to the inscribed portion is peeled off and the decorative sheet material cloth is exposed on the product surface. Therefore, appearance performance can be improved.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle interior part according to an embodiment of the present invention.

FIGS. 1 to 5 show a first embodiment in which the present invention is applied to an automobile door trim. FIGS. 1 and 2 are front and sectional views of an automobile door trim, and FIG. 3 is an automobile door trim. Explanatory drawing showing the material constitution of FIG.
FIG. 4 is an explanatory view showing a manufacturing process of the vehicle door trim.

FIGS. 6 to 11 show a second embodiment in which the present invention is applied to an automobile door trim. FIGS. 6 and 7 are a front view and a sectional view showing the structure of an automobile door trim, and FIGS. Is an explanatory view showing a material configuration of the vehicle door trim, and FIGS. 9 to 11 are explanatory diagrams showing a manufacturing process of the vehicle door trim.

First, as shown in FIGS. 1 and 2, an automobile door trim 10 is attached along a lower portion from a waist portion of a door inner panel P. The automobile door trim 10 is flat as shown in FIG. Board core material 2
0, pad material 30 having cushioning property, appearance design property,
The three members of the skin material 40 having a good touch feeling are integrated by high-frequency welding along the welded portion 11 having a desired pattern.

Since the automobile door trim 10 is a mass-produced part and can be mass-produced with inexpensive equipment, high-frequency welding is suitable. Therefore, it is a condition that various materials have good high-frequency welding characteristics.

By the way, the automobile interior parts according to the present invention can be easily manufactured by high frequency welding, but can be easily recycled, and resources can be effectively used. Since it is not used, it has various advantages such as being environmentally advantageous.

Therefore, the present invention is characterized in that the automobile door trim 10 is manufactured by high-frequency welding using the material having the material configuration shown in FIG. That is, in this embodiment, a hard board is used as the board core material 20, but a wood fiber board can also be used. The pad material 30 is made of polyethylene foam with E
A material mixed with a VA resin is used, and a thermoplastic olefin (TPO) sheet mixed with an EVA resin is used as the skin material 40.

As described above, in the present invention, since the material composition of the pad material 30 and the skin material 40 is unified to the polyolefin resin, the pad material 30 and the skin material 40 can be collectively recycled, and the resources can be reused. Easy to achieve. Moreover, since no vinyl chloride resin is used, there is no problem of dioxin and the like, which is advantageous in terms of environment.

The pad material 30 may be a polypropylene foam mixed with an EVA resin, an acrylic resin or the like, and the skin material 40 may be a PP sheet instead of a TPO sheet. Further, as a form of the pad material 30, only a welded portion 11 of polyethylene foam or polypropylene foam is used as a weld aid,
It is also possible to perform a coating treatment with a VA resin or an acrylic resin.

Next, a process of manufacturing the automobile door trim 10 using the material configuration shown in FIG. 3 will be described with reference to FIGS.
This will be described with reference to FIG. First, as shown in FIG. 4, after the skin material 40, the pad material 30, and the board core material 20 are placed on the upper surface of the lower welder 50 in this order, the upper welder 60 is lowered by a lifting mechanism (not shown). As shown in FIG. 5, the skin material 40, the pad material 30, and the board core material 20 are sandwiched between the welder upper and lower dies 50 and 60, and
0, 60, lower electrode 51, upper electrode 61
By supplying a high-frequency current through the high-frequency oscillator 70 during the predetermined time, the three members can be integrated along the welded portion 11 having the predetermined pattern shown in FIG. 1 and can be easily formed using existing welder equipment. Automotive door trim 1
0 is completed.

Next, regarding a second embodiment of the present invention,
This will be described with reference to FIGS. Note that, also in the second embodiment, a description will be given of an example in which the present invention is applied to an automobile door trim 100 provided inside a door inner panel P.
In the second embodiment, four types of materials are used. That is, a pad material 30 made of a polyolefin resin foam capable of being subjected to high-frequency welding is laminated and integrated on the surface of a flat board core material 20, and a decorative sheet material 80 is further laminated on the surface thereof. 40
Is located.

Each material of the door trim 100 is integrated by a linear welded portion 101 and a welded portion 111 on the peripheral portion of the middle portion 110. In particular, the middle portion 110 of the door trim 100 is formed by the middle portion. Part 110
Are peeled off and removed, and the interior decorative sheet 80 is exposed on the product surface side. Therefore, the product surface of the door trim 100 has a configuration in which design is enhanced by an accent effect on the appearance of the cloth 81 of the decorative sheet 80 and the skin material 40.

Next, the material composition of the automobile door trim 100 will be described with reference to FIG. 8. The board core material 20, the pad material 30, and the skin material 40 are the same as those in the first embodiment. Regarding 80, an olefin resin sheet (skin material 40) capable of high-frequency welding on the back surface of a cloth 81 based on olefin resin fibers.
(Same material as that of the backing material 82).

Accordingly, also in the door trim 100 for an automobile according to the second embodiment, if the skin material 40, the decorative sheet material 80, and the pad material 30 are peeled off from the board core material 20, the material excluding the board core material 20 is removed. Since it is based on a polyolefin resin, it can be recycled in a lump, and the material can be effectively used. In addition, since no vinyl chloride resin is used, it is environmentally advantageous.

Next, the manufacturing process of the automobile door trim 100 will be briefly described with reference to FIGS. 9 to 11. First, as shown in FIG. The pad material 30 and the board core material 20 are set in this order (the cloth 81 face down). Then, the four members are integrated along the welded portion 111 along the periphery of the in-contact portion 110 and the welded portion 101 (not shown) by high-frequency welding. Since this welding step is the same as that of the first embodiment, its description is omitted here.

Although the above four types of materials are integrated in the welded portion 111, in order to make the decorative sheet 80 appear on the product surface in the insulated portion 110, as shown in FIG.
As shown in FIG.
The skin material 40 is cut along 1. Then, FIG.
As shown in FIG. 1, a skin material 40a corresponding to the inscribed portion 110
The automotive door trim 10 with an accent on the product appearance as shown in FIGS.
0 can be manufactured.

This cutting process may be performed simultaneously with the welding step using a well bar.

[0034]

As described above, the interior parts for automobiles according to the present invention use a polyolefin resin material capable of high-frequency welding as a pad material and a skin material laminated on a board core material. Therefore, if the pad material with the skin material is peeled off from the board core material, it is possible to collectively perform the recycling and to effectively use resources.

Furthermore, by mixing or applying a welding aid such as an EVA resin or an acrylic resin to a polyolefin resin having poor weldability, high frequency welding is possible even when a polyolefin resin material is used. It can be manufactured at low cost and has an effect of being excellent in mass productivity.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment in which the present invention is applied to an automobile door trim.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an explanatory view showing a material configuration of the automobile door trim shown in FIG. 1;

FIG. 4 is an explanatory view showing a state at the time of material setting in a molding process of the automobile door trim shown in FIG. 1;

FIG. 5 is an explanatory view showing a high-frequency welding process in a molding process of the automobile door trim shown in FIG. 1;

FIG. 6 is a front view showing a second embodiment in which the present invention is applied to an automobile door trim.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6;

FIG. 8 is an explanatory diagram showing a material configuration of the vehicle door trim shown in FIG. 6;

FIG. 9 is an explanatory view showing a high-frequency welding process in the molding process of the automobile door trim shown in FIG. 6;

10 is an explanatory view showing a step of cutting a skin material in a step of forming the automotive door trim shown in FIG. 6;

FIG. 11 is an explanatory view showing a peeling step of a skin material in a forming step of the automobile door trim shown in FIG. 6;

FIG. 12 is a front view showing a conventional automobile door trim.

FIG. 13 is an explanatory view showing a material configuration of a conventional automobile door trim.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 automobile door trim 11 welded portion 20 board core material 30 pad material 40 skin material 50 lower welder 51 lower electrode 60 lower welder upper 61 upper electrode 70 high frequency oscillator 80 decorative sheet material 81 cross 82 backing material 100 automotive door trim 101 111 Welded weld 110 Middle contact

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D023 BA01 BB08 BC01 BD03 BE04 BE06 BE31 4F100 AK03B AK03C AK04B AK07C AK68B AK68C AP00 AT00A BA04 BA07 BA10A BA10B DG11D DJ01B GB33 JL02

Claims (4)

[Claims] 1. A pad material (30) made of a polyolefin resin foam capable of high-frequency welding on the surface of a board core material (20), and a skin material of a polyolefin resin sheet capable of high-frequency welding on the upper side thereof. (4
0) is placed, and the board core material (20) and the pad material (3)
0) and a skin material (40) are integrated by high frequency welding. 2. A decorative sheet material (80) lined with a backing material (82) made of a polyolefin resin sheet capable of high-frequency welding on the back surface of a cloth (81) is formed of a pad material (30) and a skin material (40). Interposed between the board core material (20), pad material (30), decorative sheet material (8
0), the four members of the skin material (40) are integrated by a high-frequency welding process along a desired weld pattern including the peripheral line of the middle portion (110), and the middle portion (11) is formed.
0) The skin material (40) is cut along the peripheral welded portion (111), and the skin material (40a) corresponding to the middle part (110) is removed, and the decorative sheet material (80) is removed.
The interior part for automobiles according to claim 1, wherein the cloth (81) is exposed on the surface. 3. The automotive interior part according to claim 1, wherein the pad material (30) is made of polyethylene foam mixed with EVA resin. 4. The skin material (40) is made of TPO sheet, PP
The automotive interior part according to any one of claims 1 to 3, wherein an EVA resin is mixed in the seat.