JPH049144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a sheet skin having an uneven pattern.

BACKGROUND TECHNOLOGY Conventionally, in manufacturing a seat skin with an uneven pattern, after overlapping the skin material, slab material, and backing material, the three layers are joined by sewing or welding, and the seams are A concave-convex pattern is applied by making the area or the welded area concave.

Problems to be solved by the invention However, in this sheet skin, skin material, slab material,
Since the only three-part part of the backing material is the recess at the seam or weld location, wrinkles are likely to occur due to the skin material shifting in the recess. Further, the uneven pattern can only be formed with relatively small undulations because the stress remaining in the slab material causes the backing material side to bulge out. Furthermore, when sewing is used, there is also the drawback that the threads tend to come undone, which tends to cause the pattern to become distorted.

Means for Solving the Problems In the method for manufacturing a seat skin according to the present invention, grooves are formed at predetermined intervals by pressing a red-hot protrusion onto one side of a slab material and melting it to a desired depth and width. After forming the groove and then heating the flat surface other than the groove to melt it to a substantially uniform thickness over the entire surface,
When these grooves and flat portions are in a molten state, a skin material that has been bent in advance to correspond to the uneven shape of the slab surface is bonded by pressure.

Function: In this sheet skin manufacturing method, grooves are created by melting the slab material, and the flat portion is also melted, and when the surface is in a molten state, the skin material is crimped and bonded, so the uneven pattern can be formed as desired. The sheet skin can be formed with large undulations, and furthermore, it is possible to produce a sheet skin that does not cause wrinkles or interlayer misalignment since the skin material is completely bonded to the surface of the slab material.

Embodiments The following description will be made with reference to the accompanying drawings.

This sheet skin is made by laminating a skin material 2 to a slab material 1 such as urethane to form a striped uneven pattern on its surface. The backing material 3 can be bonded to the back surface of the slab material 1 in advance or can be bonded simultaneously when the skin material 2 is bonded.

First, a hot pin 10 is pressed against one side of the slab material 1 to form grooves 1a, 1a, . . . . The hot pin 10 used here is made of a material with good thermal conductivity and heat resistance, such as metal such as iron or copper, or ceramic, and has concave grooves 1a, 1a formed at regular intervals on its axis. Projections 10a, 10a... having shapes corresponding to... are provided. In this hot pin 10, only the protrusions 10a, 10a, . . . are made red hot (see FIG. 1a), and in that state are pressed against one side of the slab material 1 (see FIG. 1b). At this time, the protrusions 10a, 10a... are in the optimum temperature range.
It is heated to about 700 to 800° C., and by melting the slab material 1 by pressing it, grooves 1a, 1a, . . . can be formed at predetermined intervals on the surface. It is sufficient to form the grooves 1a, 1a, . . . to have a depth of 5 to 10 mm and a width of about 10 mm.

Next, in addition to the circumferential surfaces of the grooves 1a, 1a, . . . , the planar portion of the slab material 1 is also heated to melt to a substantially uniform thickness over the entire surface. A gas burner 11 or the like can be used for this heating (see FIG. 1c), and the heating may melt the material to a thickness of about 0.1 to 2.0 mm, particularly preferably about 0.3 to 0.7 mm.

A skin material 2 is pressure-bonded to the slab material 1 whose entire width on one side is melted. During this crimping, the skin material 2 is bent in advance by the guide device 12 to match the surface shape of the slab material 1 (see Figure 1 d), and the skin material 2 is placed between the crimping roll 13 and the flexible roll 14. It is fed and pressed onto the slab material 1 whose surface is in an uncured state. The pressure roll 13 has a concave groove 1
Flange part 13 that can be fitted into the recess formed by a, 1a...
a, 13a..., and the flexible roll 14 is formed of an elastic body whose circumferential surface can be flexibly deformed, and the slab material 1 and the skin material 2 are clamped and pressed between them to join each other. (See Figure 1e).

Each of these steps can be performed continuously. Both the slab material 1 and the skin material 2 are fed out in a continuous band shape, and a hot pin 10 and a burner 11, which are sequentially arranged during the conveyance of the slab material 1, are used to form a concave groove.
After shaping and surface melting of a, 1a, etc., and bending the skin material 2 with the guide device 12, each material is fed between the pressure roll 13 and the flexible roll 14. (See Figure 2). In this continuous process, the seat skin can be manufactured at a rate of about 5 to 10 m/min, which is about twice as fast as the normal manufacturing process.

In addition, when joining the skin material 2 to the surface of the slab 1, tack is applied in advance to the parts of the skin material 2 corresponding to the grooves 1a, 1a, etc. so as to lift them in the opposite shape to the grooves 1a, 1a,... , the skin material 2 is crimped on the flat part of the slab 1, and then the skin material 2 on the reverse tacked part is bonded.
into the concave grooves 1a, 1a... (third
(See Figures a to c), not only can wrinkles be prevented from forming on the skin material 2, but also the shape of the uneven pattern can be maintained reliably. Furthermore, if the stitch pattern 4 is formed by sewing or the like in the recessed area where the skin material 2 is bonded to form the uneven pattern, a sense of luxury can be created. (See Figure 4).

Effects of the Invention As described above, according to the method for producing a seat skin according to the present invention, a slab material is melted to form grooves, and the skin material is pressure-bonded to the entire melted surface. Since the material and the backing material are integrated into one, wrinkles and interlayer deviations do not occur, and the uneven pattern can be formed into the desired large undulations without stress remaining on the slab material.

[Brief explanation of drawings]

Figures 1 a to e are explanatory diagrams showing each manufacturing process of the seat skin according to the present invention, Figure 2 is an explanatory diagram showing the continuous manufacturing process of the seat skin, and Figures 3 a to c are diagrams showing another example An explanatory diagram showing the manufacturing process of the seat skin,
FIG. 4 is a partial side sectional view of the seat skin with a stitch pattern formed thereon. 1: Slab material, 1a, 1a...: Concave groove, 2: Skin material, 10a, 10a...: Red-hot protrusion.

Claims (1)

[Claims] 1. Grooves are formed at predetermined intervals by pressing a red-hot protrusion onto one side of the slab material and melting it to the desired depth and width, and then heating the flat parts other than the grooves to create grooves over the entire surface. After melting to a substantially uniform thickness, when these grooves and flat parts are in a molten state, a surface material that has been bent in advance is crimped and joined to correspond to the uneven shape of the slab surface. A method for producing a seat skin comprising: