JPH02277609A - Production of skin for foaming integrated with skin - 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 (Industrial Field of Application) The present invention relates to a method for manufacturing a skin for integral foam molding.

(Prior art) In the skin-integrated foam molding method, a bag-shaped skin 2 having a predetermined shape is placed in a mold 4 as shown in FIG. This method is used to produce foam molded products with skins, such as automobile seats, headrests, armrests, etc., by foaming them together with skins.

Incidentally, it has come to be preferred that the seats, headrests, etc. have fabric-like skins for reasons such as increasing luxury, and fabric-like skins have also come to be used in the integral foam molding method. The fabric-like skin is formed as follows because it is necessary to prevent the liquid foaming raw material injected into the skin during skin integral foam molding from leaking out of the skin. That is, a polyurethane foam sheet or a polyurethane film, etc. is pasted and laminated on the back side of the fabric to make it liquid-impermeable, and the bond material is cut into a plurality of skin component pieces each having a predetermined shape. A fabric-like epidermis of a predetermined shape is obtained by suturing the skin.

However, even with the fabric-like skin obtained in this way, the liquid foaming raw material injected into the skin during integral foam molding may impregnate the seams, seams, etc. of the seams due to the foaming pressure. Since it leaks and hardens, there are problems in that it causes discomfort in the chain and impairs its aesthetic appearance.

Therefore, in some cases, as shown in FIG. 7, by pasting a resin tape 14 for sealing on the seam portions 12 of the skin constituent pieces 10a and 10b, the seams of the seam portions 12,
It has been made to have a fabric skin with seams etc. closed.

However, since the epidermis is usually bag-shaped, the shape is unstable, it takes time and effort to apply the tape 14, and the tape is also expensive, resulting in an increase in product cost. Furthermore, when the tape is applied, it tends to wrinkle, which can cause an uncomfortable feeling in foam-molded products.

(Problems to be Solved by the Invention) In view of the above points, the present invention has been developed to easily form a fabric skin that does not allow liquid foam raw materials to impregnate the seams and joints of the skin seams during skin integral foam molding. The present invention aims to provide a method for manufacturing a skin for integral foam molding that can be obtained at low cost.

(Means for Solving the Problems) The gist of the present invention that achieves the above object is to stitch a plurality of fabric skin constituent pieces to form a predetermined shape, and to form a seam at the sewn portion, a joint between the four pieces of the skin ↑j. A method for producing a skin for integral foam molding, characterized by applying a resin liquid to the skin and curing the resin liquid.

(Function) Since the resin liquid applied to the seams and seams of the seams of the fabric skin component has almost no pressure, it merely closes the seams and the like. By curing in this state, a skin with the seams and joints sealed is obtained. Then, if skin-integrated foam molding is performed using the skin, the liquid foaming raw material injected into the skin at that time will be prevented from impregnating the seams and seams of the sutured area, causing discomfort at the sutured area. A foamed molded product with a skin that has a good feel and has a good feel can be obtained.

(Example) The present invention will be explained below based on Examples.

FIGS. 1 and 2 are partial sectional views showing the manufacture of a skin in an embodiment of the present invention, and FIGS. 3 to 5 are sectional views of an embodiment of the laminated material before it is made into a skin component piece. It is.

In order to enhance the tactility and decorativeness of the product surface, the surface of the laminated material is made of fabric, and in order to impart liquid impermeability to the fabric, the laminated material is usually configured as shown below.

The laminated material 16 has a structure in which a soft polyurethane foam 20 is integrated into the inner surface of the fabric 18, and the laminated material 22 has a structure in which a polyurethane film 24 is further layered on the soft polyurethane foam 20 on the fabric 18. Consisting of On the other hand, the laminated material 26 is made by welding a soft polyurethane film 28 to the inner surface of the fabric 18.

First, a plurality of fabric skin components having a predetermined shape are cut from the laminated material.

Then, as shown in FIG.
30b is shown as a representative example of the cut skin component piece,
) are sewn together to form a bag of a predetermined shape. At this time, the fabric is sutured so that it is on the outside. Note that 32 is a sewing thread, 34 is a stitched portion, 36 is a seam, and 38 is a seam.

Next, as shown in FIG. Make sure to close the seam 38.

As the liquid resin 40, a copolyamide dissolved in a solvent such as methanol, a base 1-vinyl chloride resin, or a urethane resin raw material can be used. Note that the liquid resin 40 can be applied by general-purpose means such as brushing or spraying.

Thereafter, the liquid resin 40 at the seam 36 and seam 38 is cured by evaporating the solvent of the liquid resin 40 at the seam portion by air drying or heating, or by causing the liquid resin 40 to react. Seam 3
8 with the cured resin. As a result, a desired skin for integral foam molding is obtained.

The skin for skin-integrated foam molding thus obtained is subjected to skin-integrated foam molding according to a conventional method.

At that time, the liquid foaming raw material such as polyurethane foam raw material injected into the epidermis does not impregnate the seams and harden because the seams and joints of the epidermis seam are sealed with hardened resin. Furthermore, it does not seep out from the seams or the like and harden. As a result, a skin-integrated foamed molded product is obtained that does not feel uncomfortable at the seamed parts of the skin.

(Effects) This invention provides a skin for integral foam molding with the chain portion sealed by applying a liquid resin to the seams and seams of the skin seam and curing the resin as described above.

Therefore, the sealing operation is advantageous in that it is only necessary to mainly apply liquid resin, which is an extremely simple operation. Furthermore, unlike when a sealing tape is applied to a seam, the seam does not feel uncomfortable due to twisting of the tape, and a product with a good surface feel can be obtained. Moreover,
It is economical because it is only necessary to apply the liquid resin to necessary parts such as seams and joints, and the amount of liquid resin used is small. Furthermore, since the liquid resin only closes the seams and the like, the cured resin does not cause any discomfort.

[Brief explanation of drawings]

FIGS. 1 and 2 are partial cross-sectional views showing the manufacturing of a skin for integral foam molding in one embodiment of the present invention, and FIG.
Figures 5 through 5 are cross-sectional views of examples of the laminated material before it is made into a skin component, Figure 6 is a cross-sectional view showing the skin integrally foam molded, and Figure 7 is a skin integral body obtained by a conventional method. It is a partial sectional view of the skin for foam molding. 16, 22.26: Laminated material, 18: Fabric, 20
: Soft polyurethane foam, 24.28: Polyurethane film, 30a, 30b: Fabritta style skin component piece, 3
2: Sewing thread, 34: Suture portion, 36: Seam, 38: Seam, 40: Liquid resin patent applicant Inoue MBC Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Figure 6

Claims (1)

[Claims] Skin-integrated foam molding, characterized in that a plurality of fabric-like skin components are sewn together to form a predetermined shape, a resin liquid is applied to the seams at the sewn portions and the joints of the skin components, and the resin liquid is cured. Method of manufacturing epidermis for use.