JPS6341235A - Method for fixing upholstery of door trim - Google Patents

Abstract

PURPOSE:To improve appearance and bonding property in fixing the titled upholstery for an automobile by arranging a thermoplastic resin film mixed with ferromagnetic body powder both on a back side and at a hemmed portion of the upholstery and press-bonding the upholstery by heating with an electromagnetic induction heating device. CONSTITUTION:A film 8 of a thermoplastic resin such as polyvinyl chloride mixed with powder of a ferromagnetic body such as stainless steel fiber is arranged on a back side of an upholstery material 7 which is arranged at a specified position 6 of a door trim 1. then an end of the upholstery material 7 is hemmed and a film 10 which is same with the film 8 is arranged on the back side of the hemmed portion 9. The upholstery material is then is placed between upper and lower patterns 11 and 12 of an electromagnetic induction heating device 13, squeezed and electrified. With this process, films 6 and 10 are melted and the upholstery material 7 is bonded over its entire surface to the door trim 1. With this constitution, appearance of the upholstery is improved and the upholstery is prevented from swelling.

Description

DETAILED DESCRIPTION OF THE INVENTION (10) Field of Industrial Application The present invention relates to a method for fixing a decorative material placed on the surface of a door trim of an automobile.

(b) Conventional technology For example, the area around the armrest of an automobile's integrally molded door trim is decorated with decorative elements to enhance the sense of luxury.
A decorative material (for example, a textile cloth outer material) is arranged.

By the way, in the conventional technique of fixing a decorative material to a door trim, as shown in FIG.
Separately prepare a core material 105 made of iron plate or hardboard that matches the surface shape of the core material 105 and cover it with the decorative material 106. If the core material 105 is hardboard, the end of the decorative material 106 is covered with the core material 106. The end of the door trim 105 is wrapped around the back side and fixed with a tack, and then fixed to the surface of the door trim 101 (the skin material 103 is arranged on the surface of the core material 102) using a fastener such as a hook. In addition, when the core material 105 is an iron plate, the end of the decorative material 106 is wrapped around the end of the core material 105 and bonded to the back surface with adhesive.
Place the cut nail 107 into the mounting hole 1 of the door trim 101.
It was fixed by inserting it into 08, bending it, and locking it.

(c) Problems to be Solved by the Invention However, in the above conventional fixing technology, the decorative material 106
A special core material 105 is used to neatly collect and process the terminal parts of the
There was a problem that the number of assembly man-hours increased and work efficiency was poor.

However, only the peripheral portion of the decorative material 106 is fixed to the core material 105, and most of the center portion is not fixed to the core material 105, so the decorative material 106 may be raised due to its own expansion and contraction, resulting in a poor appearance. It may be unsightly, and furthermore, when adhesive is used at the end of the decorative material 106, the adhesive protrudes toward the surface, and when it is fixed with a tacker, it peels off and causes the end to lift. There were other problems.

The present invention solves these conventional problems; it has a small number of parts, a small number of assembly steps, and is easy to assemble; To provide a method for fixing a decorative material in a door trim by making it strong so that the appearance finish is beautiful after assembly and no lifting occurs at the center or end portions.

2) Means for Solving the Problems First of all, the first invention of the present invention is shown in the first embodiment drawing No. 1 of the present invention.
As shown in the figures to FIG. 5, a decorative material 7 having a film 8 made of a thermoplastic resin mixed with ferromagnetic powder on the back side is used to form a door trim l having a skin material 3 on the surface of a core material 2. At the same time, the end portion of the decorative material 7 is folded back and the film 1 is placed on the back side of the folded portion 9.
0, and the decorative material 7 is temporarily fixed to the door trim 1. Next, this is set in a mold 11.12 in which the coil 13 of the electromagnetic induction heating device is incorporated, and the coil 13 is crimped while being crimped. The present invention is characterized in that the films 8 and 10 are heated and melted by applying a high-frequency current to the door trim 1, thereby adhering the decorative material 7 to the surface of the door trim 1.

In addition, the second invention of the present invention is the first embodiment drawing of the second invention.
As shown in FIGS. 2 and 5 to 7, a decorative material 7 having a film 8 made of thermoplastic resin mixed with ferromagnetic powder on the back surface is coated on the surface of the core material 2. The door trim 10 with the decorative material 3 is placed at a predetermined installation location 6, and the film 10 is placed on the end portion 14 of the decorative material 7 on the back surface.
A trim material 15 having a shape a is arranged thereon, and the decorative material 7 is placed in 10 positions of the door trim, and then this is set in a mold 1° 12 in which the coil 13 of the electromagnetic induction heating device is incorporated. A high frequency current is applied to the coil 13 while the coil 13 is being crimped, thereby heating and melting the film 8° 108 and adhering the decorative material 7 to the surface of the door trim 1.

(E) Effect In the first invention having the above-mentioned means, the end portion is folded back and end-treated, and the decorative material 7 placed at the installation location 6 of the door trim 1 is attached to the coil 13 of the electromagnetic induction heating device. 11 and 12, and while crimping the coil 1.
When a high-frequency current is applied to 3, the ferromagnetic powder in the film 8 disposed on the back surface of the decorative material 7 is placed in an alternating magnetic field, which generates heat due to hysteresis loss and causes the base material of the film 8 to Melt the thermoplastic resin. Since the decorative material 7 is in the mold 11.12 and is pressed against the surface of the door trim 1 via the film 8, the entire back surface of the decorative material 7 is placed on the surface of the installation location 60 of the door trim 1. It will be glued to.

A film 10 is also provided on the back side of the folded part 9 at the end of the decorative material 7, but since this film 10 is also heated and melted for the same reason, the υ end can be treated by folding it back. The end of the decorative material 7 that has been applied is also located at the installation location 6 of the door trim 1.
By adhering to the outer edge surface of the decorative material 7, the end treatment of the decorative material 7 can be done visually neatly.

Further, in the first and second aspects of the present invention, similarly to the first aspect, the decorative material 7 is bonded to the surface disposed portion 6 of the door trim 10 on its entire back surface, and the edge portion 14 of the decorative material 7 is , the edge portion 14 is adhered to the trim material 151C, and the trim material 1
5 is adhered to the outer end surface of the installation location 6 of the door trim l, and the trim material 15 can cleanly finish the end of the decorative material 7.

(f) Example First, the first invention will be explained in detail.

Fig. 1 is a perspective view of an automobile door trim, and Fig. 2 is a longitudinal sectional view thereof. The door trim 1 has a skin material 3 made of a resin film made of vinyl chloride or the like laminated with a cushioning material such as polypropylene foam or phrethane foam on the back side of the skin, and the center part of the door trim 1 has a decorative effect and a good appearance. A decoration material 7 made of a surface fabric material such as fiber cloth is arranged for the purpose of improving the performance.

The core material 2 is molded into the predetermined shape of the door trim, and the armrest 4, pocket 5, etc. are integrally molded on the core material 2. On the surface of the core material 2, the skin material 3 is disposed as described above, and further around the armrest 4. A decorative material 7 is placed at a placement location 6 formed by recessing the core material 2 into a predetermined shape.

In the present invention, a film 8 is laminated and disposed on the back surface of the decorative material 7. This film 8 is obtained by kneading and extruding thermoplastic resin such as polypropylene, polyethylene, polyvinyl chloride, ABS resin, etc. and ferromagnetic powder such as stainless fiber. What is the thermoplastic resin and ferromagnetic powder? For example, the ferromagnetic powder is uniformly distributed in the thermoplastic resin at a weight ratio of 3 to 5, and the film thickness is preferably from 100 μm to 1 mm.

The ferromagnetic powder is a heat generation effect kit described later, and stainless fiber is used, and its shape is preferably about 10 μm in diameter and 1 mm or less in length, for example.

In the present invention, the decorative material 7 with the film 8 disposed on the back surface as described above is placed at the installation location 6 of the door trim 1 as shown in FIG. The same film 10 as described above is pasted on the back side of the folded part 9, and the decorative material 7 is attached to the door trim l.
It is temporarily fixed.

As shown in FIG. 5, the coil 13 of the electromagnetic induction heating device is incorporated into a f
f1ll, 12, and while crimping a predetermined portion of the door trim 1 with the upper and lower molds 11 and 12, a high frequency current is applied to the coil 13 of the electromagnetic induction heating device installed on the inner surface of the lower mold 12. By placing the films 8 and 10 in an alternating magnetic field generated by the magnetic field, the ferromagnetic powder is heated by hysteresis loss, and the films 8 and 10 are melted. 6, and the folded portion 9 of the end edge thereof is also glued to the outer edge of the installation location 6 ('g4).The electromagnetic induction heating device (including the high frequency oscillator 13') is Any known one may be used.

Next, the embodiment of the second invention will be explained.
The invention differs from the first invention in that when the decoration material 7 is placed at the placement location 6 of the door trim 1, the edge portion 1 of the decoration material 7 is
The only difference is the processing in step 4, and the rest are the same. That is, as shown in FIG. 6, a trim material 15 having the same film 10a as described above attached to the back side is disposed on the edge portion 14 of the decorative material 7 disposed at the location 6 of the door trim 1. For example, partially bonding the decorative material 7 to the door trim 1 with adhesive.
C is temporarily fixed, and the electromagnetic mirror is treated in the same manner using a heating device (Fig. 7).

In this case, by using the trim material 15, it is not necessary to form the folded portion 9 at the end edge of the decorative material 7 as in the first invention.

The trim material 15 may be made of, for example, polychlorinated vinyl or rubber, and may be laminated together with the film 10a during extrusion molding.

(g) Effects of the invention As described above, the method of fixing the decorative material in the door trim of the present invention heats the film containing ferromagnetic powder disposed on the entire back surface of the decorative material by electromagnetic induction. In particular, by gluing the entire surface to a predetermined location of the door trim, and at the end of the decorative material, by gluing the folded part in the first invention, and in the second invention. By arranging the trim material, it is possible to finish the terminals cleanly and without peeling.

Therefore, according to the method of the present invention, there is no need to use a dedicated core material like in the past, and the number of parts is small.
The number of assembly steps is reduced, making assembly easy, and since the entire body is glued together, problems such as floating in the center and end parts are eliminated, resulting in a beautiful exterior finish and strong adhesion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a door trim according to an embodiment of the present invention;
Fig. 2 is a longitudinal sectional view of Fig. 1, Figs. 3 and 4 are partial sectional views taken along the line A-A in Fig. 1 for explaining the first invention, and Fig. 5 shows the decoration material. An explanatory diagram of the process of adhering to the door trim, FIGS. 6 and 7 are partial sectional views taken along the line A-A in FIG. 1 for explaining the second invention, and FIG. 8 is a sectional view of the conventional door trim. be. 1~Door trim, 2~Core material 3~Skin material 6~Decoration material placement location 7~Decoration material 8.10,101~Film 11.12~Mold, 13~Coil patent applicant Mikuni Seisakusho Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 5

Claims (2)

[Claims] (1) A decorative material with a film made of thermoplastic resin mixed with ferromagnetic powder is placed on the back side of the door trim at a predetermined location on the door trim, which has a skin material on the surface of the core material.
The edge portion of the decorative material is folded back, the film is placed on the back side of the folded portion, the decorative material is temporarily fixed to the door trim, and then the coil of the electromagnetic induction heating device is installed. Decoration in a door trim, characterized in that the film is heated and melted by applying a high frequency current to the coil while being crimped and bonded to the surface of the door trim. How to fix the material. (2) A decorative material with a film made of thermoplastic resin mixed with ferromagnetic powder on the back side is placed at a predetermined location on the door trim, which has a skin material on the surface of the core material.
A trim material having the film on the back side is placed on the edge of the decorative material, and the decorative material is temporarily fixed to the door trim, and then the coil of the electromagnetic induction heating device is installed. The method for making a door trim is characterized in that the film is heated and melted by applying a high-frequency current to the coil while being crimped and bonded to the surface of the door trim. How to fix decorative materials.