JPS60219143A - Vehicle interior trimming material - Google Patents

Abstract

PURPOSE:To make an interior trimming material thin without lowering the effects of sound shield and absorption, by molding a plurality of members in layers, integrally with each other with gaps thereamong, and as well by forming a part of these members with woody group vinyle chloride composite members. CONSTITUTION:A molded ceiling 11 is formed of a plastic corrugated cardboard base member 12 alone, which has a sandwich structure composed of a corrugated center core 13 and liners 14, 15 laid on the upper and lower surfaces of this center core 13. The center core 13 and liners 14, 15 are made of woody group vinyle chloride composite resin materials. The woody group vinyle chloride composite resin materials is those into which woody powder is mixed, so that they are cheap and lightweight, and as well they have the characteristics of sound shield and absorption characteristics. Therefore, the thickness H2 of air layer 16 of the base member 12 may be made thin, resulting in that the entire thickness of the member is thin.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to interior materials for vehicles, and particularly to improvements in interior materials formed by integrally molding a plurality of members in a layered manner.

(2) Prior Art and Problems Conventionally, as this type of interior material, for example, a molded ceiling 2 of an automobile 1 as shown in FIG. 1 will be explained. , a base material 3, a pad 4, and a skin 5, and the base material 3 is made of polypropylene acid plastic cardboard. This plastic cardboard is made by sandwiching the top and bottom of a corrugated core 6 with liners 7 and 8, and the abutting portions of the litia 8 and the core 6 are bonded together by heating lamination to form a three-layer structure. It is an integrally molded product (for example,
No. 277). Note that the reference numeral 10 in FIG. 2 is a roof panel.

By the way, generally the above plastic cardboard is used as the base material 3.
In the molded ceiling 2, the air layer 9 provided in the base material 3
Since the sound insulation effect from outside the vehicle and the sound absorption effect in the vehicle interior become better in proportion to the thickness of the base material 3, the momentum base material 3 becomes thicker, and the interior space of the vehicle tends to become narrower.

(3) Purpose of the Invention The present invention has been made by focusing on the above-mentioned conventional problems, and its purpose is to mold the interior material thinly without reducing the sound insulation and sound absorption effects, thereby making it possible to improve the quality of the vehicle. To provide an interior material for a vehicle that can secure a wide interior space.

(4) Structure of the Invention In order to achieve the above-mentioned object, the present invention provides that a plurality of members are integrally molded in a layered manner with voids formed therein, and that at least one of the members is formed of a wood-based vinyl chloride composite member. This is the summary.

(5) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the accompanying drawings.

FIGS. 3 and 4 show a first embodiment of a vehicle interior material according to the invention with respect to a molded ceiling 11, and this molded ceiling 11 is composed only of a base material 12 of plastic cardboard. . As in the past, this base material 12 is formed in a sandwich structure with a corrugated core 13 and liners 14 and 15 disposed on the upper and lower sides of this core 13. Unlike conventional products, both are made of wood-based vinyl chloride composite resin material. This wood-based durable vinyl composite resin material is made by blending and kneading fine powder obtained by crushing wood chips into a vinyl chloride resin material and forming it into a board shape using an extruder. Since it contains wood powder, it is lightweight and inexpensive, and the fine pores of the wood powder have its own sound-insulating and sound-absorbing properties.

Therefore, when the above-mentioned wood-based vinyl chloride composite resin material is used for the core 13 and the liners 14 and 15 to form the base material 12 of the sandwich structure, these members can insulate sound from outside the vehicle and absorb sound inside the vehicle. As a result, the thickness H2 of the air layer 1B of the base material 12 can be made smaller than the conventional thickness Hl, and since the base material 12 is formed thinner by that amount, it is possible to take a large head clearance. It becomes possible. In addition, since the above-mentioned wood-based vinyl chloride composite resin material is based on vinyl chloride resin, it has good coloring, and the wood powder scattered throughout gives it a woody feel, allowing the lower liner 15 to be directly applied to the ceiling surface. can be used. Therefore, in this embodiment, the pad 4, skin 5, etc. on the lower surface of the base material 12 can be omitted, and the entire molded ceiling 11 can be molded thinly, and the manufacturing process can be simplified and the manufacturing cost can be reduced. It is possible to aim for Furthermore, in this embodiment, the weight of the molded ceiling 11 can be reduced, making it easier to handle. Furthermore,
Since vinyl chloride resin is suitable for high-frequency welding, the peripheral edge of the base material 12 can be welded using high-frequency welding, instead of the conventional polypropylene base material 3 that had to rely on adhesion. The result is easier and more beautiful than before.

In the production of the base material 12 according to the second embodiment, the core 13 and the upper and lower liners 14 are formed by, for example, extrusion molding means.
15 are each formed into a board shape, and the core 13 is sandwiched between a pair of rollers 17 and 18 having grooves formed on the circumferential surface as shown in FIG. As shown in Fig. 6, the corrugated core 13 and the flat liner 14.15 are sequentially fed into the roller section 111.2'0 and heated and laminated to integrally form the base material 12 consisting of three layers. do. Incidentally, reference numeral 10 in FIG. 4 is a roof panel.

7 and 8 show other examples of the base materials 12a and 12b. In FIG. 7, the core 13a is formed of a corrugated wood-based vinyl chloride composite resin material, and the upper and lower liners are 14a,
15a is made of ordinary vinyl chloride resin, and in contrast to this, liners 14b and 15b are made of wood-based vinyl chloride composite resin, and the core 13b is made of ordinary vinyl chloride resin. That's what happens. In the former case, since the upper and lower liners 14a and 15a are made of ordinary vinyl chloride resin, high-frequency welding of the peripheral edges is easier than in the above embodiment, and in the latter case, For example, by using a soft vinyl chloride resin for the core 13b, elasticity can be imparted to the entire base material 12b, which is particularly effective when used as a core material for a floor carpet. In the embodiments shown in FIGS. 7 and 8, a resin other than vinyl chloride resin is used for the liners 14a, 15a and the core 13b.
It can also be used for

The base material 21 shown in FIG. 8 is a two-layer molded product consisting of a corrugated core material 22 molded from a wood-based vinyl chloride composite resin material and a flat liner 23 molded from ordinary vinyl chloride resin. By attaching the core material 22 toward the vehicle body panel 24 (for example, a dash panel or a floor panel), it can be applied in place of the core material of conventional dash insulators or floor carpets.

In this embodiment as well, the air layer 25 formed between the vehicle body panel 24 and the liner 23 and the core material 22 mixed with wood powder effectively insulate sound from outside the vehicle and absorb sound inside the vehicle. The thickness H3 of the air layer 25 can be small.

Note that this base material 21 can be made by molding the core material 22 and the liner 23 separately as in the above embodiment, and then integrating them by heat lamination. 2 becomes 22 and liner 23
The core material 22 and the liner 23 are molded by sandwiching a tube-shaped parison bonded with vinyl chloride resin between molds of a predetermined shape and blowing pressurized air into the inside, or by using a mold of a predetermined shape. By vacuum forming the two, it is possible to obtain an integrally molded product with good work efficiency.

Incidentally, in the above embodiment, an example in which the cores 13, 13a, 13b and the core material 22 are formed into a corrugated plate shape has been described.
As shown in the figure, a large number of protrusions 28 may be formed on the surface.

(6) According to the vehicle interior material according to the present invention as described in detail,
Sound Insulation◆Can be applied to various interior materials that require sound absorption effects. And without reducing the sound insulation/absorption effect.
Since it can be molded thinner than conventional products, the interior space of the vehicle can be used more effectively.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the arrangement of a molded ceiling of an automobile, Fig. 2 is a sectional view showing the structure of a conventional molded ceiling, and Fig. 3 is an exploded view showing an embodiment of the base material of the molded ceiling according to the present invention. FIG. 4 is a perspective view, and FIG. 5 is a sectional view showing the structure of the molded ceiling according to the present invention.
The figure is a manufacturing process diagram showing an example of the core molding means, Figure 6 is a manufacturing process diagram showing an example of the base material molding means, and Figures 7 and 8 are cross sections showing other examples of the base material. 9 are cross-sectional views showing the structure of a base material consisting of two layers, and FIG. 10 is a perspective view showing another embodiment of the uneven shape provided on the base material. 2.11... Molded ceiling (vehicle interior material) 8, 13
, 13a, 13b - center core? , 8, 14, 14a, 1
4b, 15, 15a, 15b... Liner 22... Core material 23... Liner patent applicant Nissan Motor Co., Ltd. Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In addition to integrally molding multiple members into a layer with gaps,
A vehicle interior material, characterized in that at least one of the above members is made of a wood-based vinyl chloride composite resin material.