JPS5914348B2 - Manufacturing method for automotive interior parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing interior parts for automobiles in which a breathable skin material is coated and pasted on a reinforcing core material, and in particular, the invention relates to a method for manufacturing interior parts for automobiles, in which a breathable skin material is coated and pasted on a reinforcing core material, and in particular, the skin material can be pasted using a vacuum forming machine. This is what I did.

In general, interior parts used for the interior of automobiles have a skin material adhered to the surface of a reinforcing core material such as a hard board or a resin board via a decorative skin material or a pad material such as urethane foam.

This skin material is efficiently assembled by using a thermoplastic sheet such as vinyl leather, and bonding it integrally by sliding it on the surface shape of the core material by vacuum forming. Furthermore, in recent years, with the trend toward interior design of automobile interiors, it has become common practice to cover the surface with decorative breathable sheets such as cloth or carpet instead of the thermoplastic sheets mentioned above. Because it is breathable, it cannot be vacuum formed, so it is manufactured using traditional sewing or hand-cutting methods, which is time-consuming, and when creating complex curved surfaces, it wrinkles in some areas, but it is not in good condition. The drawback was that it was not possible to create a smooth surface.

Furthermore, when using a manual method, the adhesive tends to leak onto the surface and stain the surface, and it requires a curing period (the period until the solvent completely evaporates and the adhesive completely solidifies). The product cost was also extremely high compared to those made of vinyl leather. 15 This invention has been made in view of the above-mentioned current situation, and consists of laminating a heat-adhesive film directly or through a pad material on the back side of a decorative breathable sheet, preheating the film to melt it, and then By covering the core soil with
To provide a method for producing interior parts for automobiles, which allows even breathable sheets to be attached by vacuum forming means in the same way as conventional non-breathable thermoplastic resin sheets, and also eliminates the need for adhesives.

Hereinafter, an embodiment in which the present invention is applied to the manufacture of door trims will be described with reference to the drawings.

FIG. 1 shows a vacuum forming machine used for carrying out this invention.

In the figure, reference numeral 1 denotes a main table 30 equipped with a vacuum pump 2. This main table 1 is installed so as to be movable up and down by an appropriate lifting means, and the central part of the main table 1 is connected to the vacuum pump 2. A path 3 is provided through this.

4 is a seat placed on the main table 1;
This pedestal 4 is made of a material such as a perforated plate on its upper surface and side surfaces, and therefore, air around the pedestal 4 is sucked into the vacuum pump 2 and discharged through the numerous holes and the above-mentioned path 3.

Further, the pedestal 4 has a similar shape to the reinforcing core material 5 placed on the upper surface of the pedestal 4, and is formed smaller than the reinforcing core material 5.
Furthermore, a pedestal 4 and a core material 5 are mounted on the top of the main table 1.
A clamping device 6 is constructed to surround the outer peripheral edge of the clamping device 6, and the clamping device 6 is located between the clamping device 6 and the main table 1. A heater device 8 for heating is installed respectively. Moreover, FIG. 2 shows a completed view of the door trim pasted using the vacuum forming machine, in which the core material 5 is a trim board 1 made of a material such as a chip board or a resin board.
0 and a carnish 11 made of a metal plate attached to the edge of the board 10 with a metal stitcher etc. to form a door trim shape.
A protrusion 10a is provided on the surface of the door trim to match the protrusion of the door trim. Then, pores 10b (see FIGS. 1 and 3) are bored in the curved surface portion formed by the convex portion 10a and at appropriate locations on the trim board 10, so that the above-mentioned skin can be removed during vacuum suction, which will be described later. This prevents the formation of an air layer between the material 7 and the core material 5, and further improves the adhesion of the skin material 7 to the core material 5. The skin material 7 attached to the surface of the core material 5 is composed of a breathable decorative sheet 12 such as cloth or carpet, and a pad material 13 made of foamed resin and a heat-adhesive film 14 on the back side. Next, a procedure for attaching this skin material 7 to the core material 5 using the above-mentioned vacuum forming machine will be explained. First, the core material 5 is positioned and placed on the pedestal 4, and when the vacuum pump 2 is operated, the core material 5 is brought into close contact with the pedestal 4 by suction.

On the other hand, the clamp device 6 is in a state in which the edge of the skin material 7 is clamped, and the heater device 8 is in a state in which it is located between the clamp device 6 and the main table 1. When the heater device 8 is driven, the heat-sealing film 14 and the core are removed. The surface of the material 5 is heated together, and the surface of the film is melted, and the pad material 13 is also softened and plasticized by the heat.

Note that if the heater temperature is too high, the entire film will melt and the airtightness during vacuum suction will no longer be maintained, so adjust the heating temperature and time appropriately, and select a film with a thick film thickness. do it.

After sufficient heating, move the heater device 8 in the stacking direction, raise the main table 1, and press the skin material 7 against the surface of the core material 5. As shown in FIGS. 3 and 4, the core material 5 and The gap between the skin materials r is sucked, and the skin material 7 slides on the surface shape of the core material 5 and comes into close contact with it.

At this time, the surface of the core material 5 is heated to a high temperature, the surface of the film 14 is also in a molten state, and the pad material 1
Since the pad material 3 is also plasticized, the pad material 13 deforms by sliding on the surface shape and maintains its shape, and at the edge of the core material 5, it is rolled up on the back surface of the core material 5 by the suction force.
Further, the rolled-up portion of the pad material 13 is crushed by the suction force, and maintains its shape after being deformed into a flat state. Next, when the core material 5 and the skin material 7 are cooled while being sucked, the once molten film 14 is solidified and the core material 5 and the skin material are bonded to each other.

Therefore, after the collar is removed, the suction is stopped and the reverse side is trimmed to obtain a door trim in which each part is integrated as shown in FIG. 2.

It should be noted that the method of the present invention is not limited to door trims, but can of course be applied to general automobile interior parts that combine a core material and a skin material. Therefore, in this case, if a skin material made by directly laminating a breathable sheet and a heat-adhesive film is used, the adhesive can be processed by vacuum forming as described above.

As is clear from the above description, in the method of the present invention, by having the structure as described above, the breathable sheet, which had conventionally been attached to the core material by hand sewing or hand pasting, can be attached by vacuum forming. This has advantages such as extremely easy manufacturing, high efficiency of work, and low cost.

In addition, in the present invention, by using a heat-adhesive film, problems such as staining of the product surface and the need for a curing period can be solved compared to the use of adhesives.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a vacuum forming machine used for carrying out this invention;
Figure 2 is a perspective view showing a part of the door trim in section;
The figure is a cross-sectional view of the vicinity of the door trim during the adhesion process.
The figure is an enlarged sectional view of the same part. 4...Pedestal, 5...Reinforcement core material, 7...
...Skin material, 8...Converter device, 12...
... Decorative sheet, 13 ... Padded material, 14
...Heat-fused film.

Claims (1)

[Claims] 1. Position and place the core material on a breathable pedestal, and place a skin material made by laminating a heat-adhesive film directly or via a pad material on the back side of the breathable sheet on top of the core material, A heater is interposed between the skin material and the core material to melt the surface of the film and heat the surface of the core material at the same time, and then the skin material is coated on the core material and the pedestal is vacuum-suctioned. A method of manufacturing automotive interior parts in which a skin material is integrally attached to the surface.