JPS5935941A - Manufacture of interior finish part for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to interior parts for automatic illumination having an uneven shape such as an instrument panel, an insole box, and an armrest. It is related to the method.

For some passenger cars, woven fabrics, fabrics, etc. have been used as decorative skin materials for interior parts, providing interior parts that not only look luxurious but also feel extremely good to the touch.

In addition, conventional methods for attaching this type of breathable skin material to base materials constituting interior parts include sewing and manual attachment.

However, although such a method can be easily applied to almost flat interior parts such as the door rim,
When it comes to three-dimensional parts such as instrument panels, console boxes, and armrests, which have uneven surfaces, the pasting process is complicated, mass production is difficult, and they do not fit well with the external shape of the interior parts base material. There were various drawbacks.

As a method to overcome the above-mentioned drawbacks and still enable mass production, a method has recently been proposed in which the skin material is adhered and molded by a vacuum suction method.

However, since the skin material is breathable, it is difficult to perform attachment molding using vacuum suction with the skin material alone. A flexible non-porous resin sheet 1 such as a vinyl sheet was laminated in advance, and this laminated sheet 1~ was molded in January (= 1 piece) by a vacuum suction method. .

However, in this type of molding method, since the sheets 1~ that make up the skin material are laminate sheets, the cost of raw materials and materials are extremely high, and When performing vacuum adhesion molding, wrinkles tend to occur on the surface, and air pockets can occur between the base material and the skin material. “After 1 molding, defects such as shrinkage of the skin material were observed, and the product yield was low.

In addition, such a problem arises because when laminating the skin material and backing material, they are laminated with an adhesive, but even if both have high flexibility and elasticity, the The adhesive layer interposed between them becomes a factor that inhibits the elongation of the two, creating a factor that reduces the product yield as described in the previous section.If the layer is forcibly stretched, the adhesive peels off and the surface layer deteriorates. Peeling occurs between the layers of the backing material and the backing material, causing the appearance of the product to be lifted, which significantly impairs the design effect.

The method of the present invention has been developed to solve the above-mentioned drawbacks, and uses the vacuum adhesion molding method described above to apply the decorative skin material directly and tightly along the shape of the base material of the interior parts. The purpose is to make it possible.

In order to achieve the above object, the present invention provides an automobile interior part in which a base material having an uneven shape is covered with a skin material having air permeability and flexibility, and is integrally adhered and molded. The base material on which the adhesive layer has been formed is placed on a product fixing table that communicates with a vacuum suction device, and the peripheral edge of the skin material is fixed at a position facing the fixing table, and a rubber is attached to the back side of the skin material. (1) polymerizing the air-impermeable assist sheet, (2) heating the surface of the base material and melting the adhesive layer; and (2) bringing the substrate and the skin material relatively close to each other, and operating a vacuum suction device. The assist sheet is elastically deformed by the vacuum suction action, and the skin material is made flexible along the uneven shape of the base material by the biasing pressure. It is characterized in that, while being deformed, it is brought into close contact with the surface of the base material via the adhesive layer.

Hereinafter, one embodiment of the method of the present invention applied to an instrument panel among automobile interior parts will be described in detail with reference to the drawings.

FIG. 1 shows an instrument panel, in which reference numeral 1 is a suede-like synthetic resin sheet 5- and 2 is a base material made of foam.

The above-mentioned sweat J-like synthetic resin sheet 1 (hereinafter abbreviated as sheet 1) is stretchable and breathable, and the sheet 1 and the base material 2 are attached via an adhesive in the following process. molded.

FIGS. 2 and 3 show an apparatus for pasting the sheet 1 onto the inmetromen 1 and the panel base material.

In the figure, this device includes a table 3 that can be raised and lowered by an air or hydraulic cylinder, a fixing table 4 on which the base material 2 is placed, and an outer plate 5 surrounding the table 3. , a support clamp 6 installed at the upper end of the outer plate 5, and a heater 8 that is located between the support clamp 6 and the table 3 and is slidable in a direction perpendicular to the plane of the paper.

The table 3 is formed with an air vent hole 9 that communicates with the hollow interior of the product fixing table 4, and the air handling hole 9 is connected to a vacuum suction device (not shown) through a suction pipe 10 and an on-off valve 11. is connected to.

Next, a case in which a sheet is formed on the instrument panel base material 2 using the apparatus configured as described above will be explained step by step.

First, the instrument 1 to the panel base material 2 are placed on the product fixing table 4, and the base material 2 is fixed to the fixing table 4 by fitting the peripheral edges to the side surfaces of the fixing table 4.

Although not shown, a thermosetting adhesive is applied to the surface of the base material 2 in a previous step.

Next, the peripheral edges of the seams 1 to 1 are fixed to the support clamp 6, and the non-breathable rubber assist seams i to 7 are superimposed on the top surface of the sheets, and the peripheral edges of both are fixed to the support clamp 6.
The substrate 2 is clamped and fixed, and placed opposite to the upper surface of the base material 2.

Next, the heater 8 is brought out, and when it is placed on the top surface of the base material 2, it is heated, and the thermosetting adhesive coated on the base material 2 is heated to 40'C to 160C. Ru. Such heating causes the adhesive layer to melt.

At this stage, the heater 8 is slid backward.

Next, if you drive the cylinder and move table 3 to -,
The lower surface of the sheet 1 is in contact with the surface of the base material 2, and
This is flexibly deformed, and the outer peripheral edge of the table 3 and Art
A sealed portion (not shown) is formed by the assist sheet 7.

Immediately thereafter, the on-off valve 1 provided on the suction pipe 10
1, the inside of the fixed base 4 is communicated with a vacuum suction device (not shown), and when this vacuum suction device is operated, the air in the closed space formed by the table 3 and the assist sheet 7 is sucked out. The assist sheet 7 is elastically deformed, and due to this elastic deformation (d) the sheet 1 is
1 is firmly pressed against the surface of the base material 2.

Therefore, the sheet 1 is integrally adhered to the surface of the base material 2 due to the <- pressure of the assist sea I- and the interposition of the heated thermosetting adhesive layer. The suede-like synthetic resin sheet is stretchable, and the assist sheets 1 to 7 are stretchable, and the suede-like synthetic resin sheets are stretchable, so they can faithfully conform to the outer shape of the base material 2. Since the synthetic resin sheet 1 is breathable and the assist sheet 7 is non-breathable, the sheets 1 to 1 do not have any wrinkles, and in that state, they can be applied along the uneven shape of the surface of the Fugetsu 1. Adhesion is done smoothly and smoothly.

It should be noted that the thermosetting adhesive used in the practice of this invention has an adhesive strength greater than the shrinkage force of the suede-like synthetic resin sheet 1.

Further, in the above embodiments, a manufacturing method using a suede-like synthetic resin sheet has been described, but any decorative skin material that is stretchable and breathable can also be used, such as cloth.

As explained in detail in the examples above, the method of the present invention is more easily conformable to the base material than the conventional vacuum forming method using a skin sheet lined with a backing material, and the skin sheet does not have wrinkles. There is no occurrence of shrinkage or shrinkage after adhesion, and there is no lifting of the surface material due to peeling of the adhesive, resulting in a significant improvement in product yield.

10- Furthermore, the method of the present invention has various effects such as being able to significantly reduce the cost of raw materials and materials compared to methods using conventional backing materials.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the case where the method of the present invention is applied to an instrument panel, and FIGS. 2 and 3 show instrument panel 1 to a method and apparatus for attaching a skin material to a panel base material. FIG. 2 is a longitudinal sectional view showing the state before adhesion, and FIG. 3 is a longitudinal sectional view showing the state after adhesion. 1... Suede-like synthetic resin sheet 2...
... Instrument panel base material 3 ... Table 4 ... Product fixing base 5 ... Outer panel 6 ... Support clamp 7 ... Assist sea 1 to 8... Heater 9... Air vent hole 10... Suction pipe 10-, 11... On-off valve special Vf Applicant Kasai Kogyo Co., Ltd. 11- Figure 1

Claims (1)

[Claims] (1) In an automobile interior part formed by covering a base material with an uneven shape with a skin material having air permeability and flexibility and integrally molding the base material in an irregular shape; Install it on a product fixing platform that communicates with the suction device, fix the periphery of the skin material in a position facing the fixing base, and superimpose a rubber-like non-breathable assist sheet on the back side of this skin material. A step of heating the surface of the base material and melting the adhesive layer; A step of bringing the substrate and the skin material relatively close to each other, and operating a vacuum suction device to vacuum the inside of the fixing table. The assist 1 sheet is elastically deformed by the vacuum suction action, the skin material is flexibly deformed along the uneven shape of the base material by the biasing pressure, and the adhesive layer is Automotive interior parts characterized by being closely attached to the surface of the waste material through! II manufacturing method.