JPH047004Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications In addition to contributing to soundproofing and airtightness of various noises generated in automobiles, door trims, quarter trims, wheel house trims, The head lining, motor shelving, side shelving, and pillar trim are lined. The present invention relates to this automotive interior material, particularly to an interior material made of vinyl chloride powder.

Conventional technology Conventional automotive interior materials such as door trims, quarter trims, and head linings generally have urethane foam sandwiched between a core material and an outer skin in order to provide sound insulation and a soft feel. There is. Flat or molded hardboard is used for the core material, and vinyl leather, fabric, etc. are used for the outer skin. The ends of the outer skin placed over the core material and the urethane foam were wrapped around the back surface of the core material and fixed by tacking, adhesive, or the like.

Hereinafter, the case where the core material is flat will be explained with reference to Fig. 5. 1 is a flat core material, 5 is a urethane foam. Insulating materials such as Reference numeral 6 is the outer skin, and the end portion covering the urethane foam 5 is wrapped around the back surface of the core material 1, and the tatsuka needle 7
It is fixed by stopping it.

In addition, when the core material is molded as shown in FIG.
In order to prevent the laminate 8 from lifting up from the core material 3, an adhesive 9 is applied to the surface of the core material 3 and bonded.

Problems to be Solved by the Invention However, conventional door trims, head linings, pillar trims, etc. used in automobile interiors are made by layering urethane foam 5 on core materials 1 and 3 and covering with skin 6, or by combining urethane foam and skin. This work had to be done by hand, as it was covered with a laminate (laminate) 8, wrapped around the edges, and attached with a tack needle 7 or adhesive 9. For this reason, wrinkles may appear depending on the tension of the epidermis, especially when the molded core material 3
When encapsulating the core material 3, the laminate 8 of the urethane foam and the skin tends to float more easily than the core material 3, and a countermeasure for this problem has been desired.

Means for Solving the Problems The present invention solves the above-mentioned problems by placing vinyl chloride powder on a core material coated with a certain amount of heat-activated adhesive, melting and adhering it, and An interior material for an automobile, characterized in that the molten adhering surface of the vinyl chloride powder is subjected to a texture forming process using a heated texture roll or a texture mold to form a texture on the surface of the skin. be.

Effect According to the above-mentioned means, the white ball or the grain press, which is heated by its own heating means and maintained at a predetermined temperature, heats the vinyl chloride powder that has been melted and adhered to the core material and grain-forms it. Since it is processed, a stable grained surface can be formed without any remaining roughness on the resin surface.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows a cross section of an automobile interior material using a flat core material, where 1 is the flat core material and 2 is a skin formed on the core material. An automobile interior material having such a cross-sectional structure is manufactured by the procedure shown in FIG. That is, first, a certain amount of heat-activated adhesive is applied onto the surface of the core material 1, and the core material 1 is placed in a heating furnace 10 and heated (FIG. 3a). Then, by dropping vinyl chloride (PVC) powder 12 from the hopper 11 onto the adhesive-coated surface of the core material 1 that has been heated and has functioned as an adhesive, the vinyl chloride powder is deposited on the surface of the core material 1. The bodies 12 are melted and adhered (FIG. 3b). After that, the vinyl chloride powder 12 is melted and adhered to the surface of the core material 1.
The surface of the layer can be textured while heating the vinyl chloride powder 12 by rolling and pressing the heating texture roller 13, which is constantly heated to a predetermined temperature by its own heating means. Yes, it is possible (Figure 3c). As a result, grains are formed on the surface of the layer of vinyl chloride powder 12, which will become the skin 2 of the automobile interior material, and the interior material 14 consisting of the core material 1 and the skin 2 with the grains formed on the surface is completed. Figure 3 d).

Next, FIG. 2 shows an example in which a molded core material is used, and core materials 3 and 4, which are molded into curved surfaces, are skins formed on the core material. The manufacturing procedure in this case is shown in FIG. 4 and explained. First, a certain amount of heat-activated adhesive is applied on the surface of a flat core material, and an upper mold with a heating plate 15 and a lower mold with a heating plate are formed. 1
6 and press while heating (Fig. 4a).
By this pressing, the flat core material becomes the core material 3 molded into a desired shape. The adhesive-coated surface of the core material 3 functions as an adhesive when heated during molding, and can adhere (melt and adhere) the vinyl chloride powder 12 (Fig. 4 b, c). . In this way, the core material 3 to which the vinyl chloride powder 12 is melted and adhered
The vinyl chloride powder 12 is placed on the lower mold of the grain pressing mold with the adhesive layer facing upward, and is pressed by the upper mold equipped with its own heating means, that is, the grain pressing mold 17 with a heating plate, to perform the graining process. administered. (Figure 4c,
d). As a result, grains are formed on the surface of the layer of vinyl chloride powder 12 that becomes the skin 4 of the automobile interior material, and the skin 4 with the grains formed on the core material 3 and the surface.
The interior material 18 consisting of is completed.

The interior materials 14 and 18 described above are both provided with heating means and are subjected to texturing using the heated texturing roll 13 heated to a predetermined temperature or the texturing die 17 with a heating plate, so that the core material The surface of the layer of vinyl chloride powder 12 melted and adhered to layers 1 and 3 is textured while being heated.
Therefore, no lumps (roughness) of the powder remain on the surface of the skin (layer of vinyl chloride powder 12) after graining, and stable graining that looks good as an interior material can be performed.

Effects of the invention As a result of the above, the interior material for automobiles according to the invention is
The surface of the vinyl chloride powder layer that has been fused and adhered to the core material is textured while being heated using a texture roll or texture mold that is heated to a predetermined temperature by its own heating means. No lumps remain on the surface and spoil the appearance. Furthermore, the finished product does not suffer from wrinkles or the surface layer lifts, allowing for effective processing. In addition, since the processing process is simple and easy, it can also be processed using an automated line.
This enables mass production at low cost.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of an interior material when the core material is flat, showing one embodiment of the present invention, and Fig. 2 is a structural diagram of an interior material when the core material is molded, showing another embodiment of the present invention. It is a structural diagram of the material. FIG. 3 is an explanatory diagram of the interior material processing process when the core material is flat,
a is a diagram of the core material heating state, b is a diagram of the PVC powder application state,
c is a state diagram of heated crimp roll pressing, d is a diagram of a finished product having a grained skin, and FIG. 4 is an explanatory diagram of the interior material processing process when the core material is molded, a is a thermoforming state diagram, b is
A diagram of the state of PVC powder adhesion, c is a diagram of the state before graining, and d is a diagram of the state during graining to obtain a finished product with a textured skin. FIG. 5 is a structural diagram showing a conventional example of an interior material with a flat core material, and FIG. 6 is a structural diagram showing a conventional example of an interior material with a molded core material. 1, 3... core material, 2, 4... skin made from powder, 5... urethane foam, 6... PVC skin, 7... tatsuka needle, 8... laminate of PVC and urethane foam, 9... Adhesive, 10... Heating furnace, 11... Hotsupa, 12... Vinyl chloride (PVC) powder, 13... Heating Shibo roll, 14,
18...Interior material, 15...Upper mold with heating plate, 16...
Lower die with heating plate, 17... Grain press die with heating plate.

Claims (1)

[Scope of utility model registration request] The vinyl chloride powder is placed on a core material coated with a certain amount of heat-activated adhesive, and the vinyl chloride powder is melted and adhered to the core material. An automobile interior material characterized by applying a texture molding process to the melt-adhesive surface of the body and forming a texture on the surface of the skin.