JPH0637127B2 - Interior parts for automobiles - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an automobile interior part in which a skin material is integrally attached to the surface of a core material by press molding, and particularly to an air trap between the core material and the skin material. The present invention relates to an automobile interior part that surely prevents the occurrence of wrinkles and wrinkles on the surface of a skin material.

<< Prior Art and Its Problems >> For example, automobile interior parts such as door trims and body sides are usually composed of a laminated structure of a core material, a cushion material, and a skin material, and in manufacturing these interior parts, If the skin material is a breathable material such as a cloth material, when the thermoplastic resin plate or the composite resin plate is softened by heating and formed into a desired shape by cold press molding, molding of these core materials and the breathable skin material However, when a non-breathable material such as a PVC resin sheet is used as the skin material, the skin material and the core material can be formed by cold press molding. During this period, air is generated and wrinkles are generated on the surface of the skin material, resulting in a product with extremely poor surface appearance and surface feel.

Therefore, when using a non-breathable skin material, usually, only the core material is formed by cold press molding, and after vacuum holes are formed at appropriate positions in the core material, the skin material is laminated on these core materials. The air between the skin material and the core material is evacuated by vacuum forming through the vacuum holes, and the skin material is integrally attached to the surface of the core material.

Since the vacuum molding is used for sticking the skin material after the core material is press-molded as described above, there are drawbacks that a large number of manufacturing processes are required and a large amount of die equipment is required, resulting in a significant cost increase.

Furthermore, since it is necessary to make vacuum holes in the core material,
It has been pointed out that the rigidity of the core material is lowered, the impact resistance is weakened, and the product function is lowered.

<< Object of the Invention >> The present invention has been made in view of the above circumstances, and an object of the present invention is to integrally form a core material and a skin material even when a non-breathable skin material is used. Another object of the present invention is to provide an automobile interior part that can be press-molded into.

<< Structure and Effect of the Invention >> In order to achieve the above object, the present invention provides a core material press-molded into a required shape so as to be suitable for a vehicle body panel, and a skin integrally attached to the surface of the core material. An interior part for an automobile comprising a laminated structure with a material, wherein the skin material is formed by knitting or weaving crimped yarn on the back surface of a resin sheet having elasticity of 10% modulus 0.1 to 1.0 kg / cm. The fabric sheet obtained by the above is laminated, and the skin material is integrally attached to the surface of the core material during press molding of the core material.

That is, in the automobile interior part according to the present invention, the skin material is integrally attached to the surface of the core material formed into a desired shape by the press molding simultaneously with the press molding, and the skin material has a 10% modulus of 0. A cloth sheet obtained by knitting or weaving crimped yarns is laminated on the back surface of a resin sheet having elasticity of 1 to 1.0 kg / cm, and a core material is formed along the press mold surface during press molding. When molded, the resin sheet and the fabric sheet laminated to the back of this sheet have an excellent expansion and contraction effect, so during press molding, the skin material can be stretched to an arbitrary curved shape by following the core material. As a result, wrinkles do not occur on the surface of the skin material, and the appearance of the product is improved.

Further, during the integral press-molding of the skin material and the core material, the air present between the skin material and the core material is absorbed in the cloth sheet, or a part of the air is removed to the outside through the cloth sheet. Therefore, air pockets do not occur between the skin material and the core material, and in addition, when the crimped yarn of this fabric sheet is cut into the core material at the time of molding, so-called anchor effect can be expected, so It is firmly bonded to the core material.

In this way, excellent elasticity (10% modulus 0.1 to
1.0 kg / cm) resin sheet having a back surface is also used, and a skin material laminated with a cloth sheet obtained by knitting or weaving crimped yarns also having elasticity is used to integrally form the skin material and the core material. Since it is possible to integrally press work, it effectively solves problems such as air pockets and wrinkles on the surface, and can be manufactured in one process, simplifying man-hours, reducing mold equipment, inventory of work-in-process It can be eliminated and a great cost reduction can be expected.

<< Description of Embodiments >> Hereinafter, embodiments of an automobile interior part according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view showing a vehicle door trim to which the present invention is applied, and FIG. 2 is a sectional view for explaining a manufacturing process of the door trim.

In FIG. 1, reference numeral 1 indicates an automobile door trim, and the door trim 1 is composed of a core material 2 and a skin material 3.

More specifically, the core material 2 is obtained by extruding a pad waste and a polypropylene resin at an appropriate mixing ratio with stirring, extruding the extruded sheet into a sheet, heating and softening the sheet, and then press-molding the sheet into a desired shape. It is molded and its outer circumference is trim cut.

On the other hand, the skin material 3 attached to the surface of the core material 2 is
It is composed of a non-breathable resin sheet 4 such as PVC resin, and a fabric sheet 5 laminated on the back surface of the resin sheet 4, and the fabric sheet 5 is obtained by knitting or weaving crimped yarn. And it is commonly called knitted cloth.

In the present application, it is necessary that the resin sheet 4 has an excellent expansion and contraction action, and therefore, the resin sheet 4 has a 10% modulus of 0.1 to 1.0 kg / cm. The amount of plasticizer contained in is adjusted.

If desired, a foam layer such as polyethylene foam or polypropylene foam may be interposed between the resin sheet 4 and the fabric sheet 5 to give a cushioning effect to the product.

Next, the manufacturing process of the door trim 1 will be described with reference to FIG.

On the lower press mold 6 having a desired mold surface 6a, the core material 2 which is heated and softened by a heating means (not shown) is placed, and the skin material 3 is placed from the upper side of the core material 2.
Are laminated so as to face the core material 2. After that, the upper press die 7 configured to be able to move up and down descends with respect to the lower press die 6 by the operation of a driving means (not shown), and the upper and lower press dies 6 and 7 form the core material 2 and the skin material 3 into a mold surface shape. Simultaneously with press molding, the skin material 3 is integrally attached along the surface of the core material 2.

At this time, since the skin material 3 is obtained by laminating the stretchable cloth sheet 5 on the back surface of the stretchable resin sheet 4, the die surfaces 6a and 7a of the press dies 6 and 7 have complicated shapes. However, the skin material 3 easily follows along these mold surfaces, and it is possible to form a fine shape.
Wrinkles do not occur on the surface. In addition, the air between the skin material 3 and the core material 2 is absorbed in the cloth sheet 4, or a part of the air is removed out of the mold through the cloth sheet 4, so that the skin material 3 and the core material 2 are separated from each other. It is also possible to prevent air accumulation from occurring. Therefore, according to the configuration of the present application,
The door trim 2 having a good surface appearance and a good surface feel can be manufactured.

Further, the crimped yarns constituting the fabric sheet 5 dig into the softened core material 2, and the skin material 3 and the core material 2 are firmly bonded by the so-called anchor effect.

In addition, although the door trim for automobiles has been described in the present embodiment, the present invention can be applied to interior parts other than the door trim such as the body side, and the present invention is a laminate in which the surface of the core material is covered with a non-permeable skin material. Any structure can be easily applied, and its application is wide, and it has extremely high practical value.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a vehicle door trim to which the present invention is applied, and FIG. 2 is a sectional view for explaining a manufacturing process of the door trim. 1 …… Automotive door trim 2 …… Core material 3 …… Surface material 4 …… Resin sheet 5 …… Cloth sheet 6 …… Press lower mold 7 …… Press upper mold

Claims (1)

[Claims] 1. An automobile interior part comprising a laminated structure of a core material press-molded into a required shape to fit a vehicle body panel and a skin material integrally attached to the surface of the core material. The skin material is formed by laminating a cloth sheet obtained by knitting or weaving crimped yarn on the back surface of a resin sheet having elasticity of 10% modulus 0.1 to 1.0 kg / cm, and An interior part for an automobile, wherein the skin material is integrally attached to the surface of the core material during press molding of the core material.