JPH049146B2 - - 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.

Conventional 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 formed by making the welded parts or welded parts concave.

Problems to be solved by the invention However, in this sheet skin, the skin material, slab material,
Since the only three-part part of the backing material is the concave part at the seam or welding part, wrinkles are likely to occur due to displacement of the skin material at the convex part. In addition, the uneven pattern can only be formed with relatively small protrusions because the stress remaining in the slab material causes the backing material side to bulge out. Furthermore, when sewing is used, there is a drawback that the thread tends to come out and the pattern is likely to be distorted.

Means for Solving the Problems In the method for manufacturing a seat skin according to the present invention, grooves of a desired depth and width are cut and formed at predetermined intervals on one side of a slab material, and then the surface containing the grooves is The slab is heated and melted to a substantially uniform thickness, and when the surface is in a molten state, the skin material, which 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, the surface of a slab material with grooves provided at predetermined intervals is heated and melted, and then the skin material is bonded by pressure while the surface is in a molten state, so that a desired uneven pattern is formed. To produce a sheet skin that can be formed with a large roughness and that does not cause wrinkles or interlayer deviations since the skin material is completely bonded to the surface of a 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, for the slab material 1, a total of three cutters 10( vertical cutter 2
Concave grooves 1a, 1a with rotary blades that cut the grooves and grooves
... is formed (see Figure 1a). The groove 1a,
1a... may be formed to have a depth of 5 to 10 mm and a width of about 10 mm. Next, by pressing the hot pin 11 against the surface, the surface including the grooves 1a, 1a, . . . is melted to a substantially uniform thickness. Here, hot pin 11
The grooves 1a, 1a, etc. can be made of metals such as iron or copper, or materials with good heat conductivity and heat resistance such as ceramics, and grooves 1a, 1a, etc. are formed at regular intervals on the axis. A protrusion 11a having a shape of
11a... are provided. This hot pin 11
The whole body, including the protrusions 11a, 11a, . At this time, hot pin 11
is heated to an optimum temperature range of 700 to 800℃,
By pressing the protrusions 11a, 11a... into the groove 1
By melting the flat portions of the circumferential surfaces of a, 1a, . Instead of this,
If the direction of the grooves 1a, 1a... is the same as the feeding direction of the slab material 1, by uniformly applying the burner flame to the entire surface including the grooves, the entire surface including the grooves can be melted to a substantially uniform thickness. (See Figure 1c). At this time, the burner is preferably a ribbon burner because the flame becomes uniform.
1a... is the same as the feed of slab material 1, and the burner is fed in such a way that it crosses the burner.The angle of the burner relative to slab material 1 is the ribbon burner within a range of 60° above and below it, assuming that the shortest distance is the reference plane. It is best to adjust the temperature of the flame to the optimum temperature range of 700 to 800℃. In either case, the melting thickness may be approximately 0.1 to 2.0 mm, particularly preferably approximately 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 peripheral surface can be flexibly deformed, and the slab material 1 and the skin material 2 can be joined to each other by compressing them between them. (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 cutters 10 and hot pins 11, which are sequentially arranged while the slab material 1 is being conveyed, are used to cut the grooves 1.
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 onto the planar portion of the slab 1, and then the skin material 2 on the reverse tacked portion is dropped into the grooves 1a, 1a... and joined (see Fig. 3a).
- 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, after forming grooves on a slab material, the entire surface of the slab material is melted and the skin material is pressure-bonded. Since the backing material is integrated into three parts, wrinkles, interlayer deviations, etc. do not occur, and the uneven pattern can be formed in a large desired shape from a place where no stress remains on the slab material.

[Brief explanation of drawings]

1A to 1E are explanatory diagrams showing each manufacturing process of a seat skin according to the present invention; FIGS. 3A to 3C are explanatory diagrams showing manufacturing processes of a seat skin according to another embodiment;
The figure is a partial side sectional view of a seat skin with a stitch pattern formed thereon, and FIG. 2 is an explanatory diagram showing a continuous manufacturing process of the seat skin. 1: Slab material, 1a, 1a...: Concave groove, 2: Skin material, 10: Cutter for forming concave groove.

Claims (1)

[Claims] 1. After cutting and forming grooves of desired depth and width at predetermined intervals on one side of the slab material, the surface including the grooves is heated and melted to a substantially uniform thickness, and when this surface is in a molten state, the thickness of the slab surface is 1. A method for manufacturing a seat skin having an uneven pattern, characterized in that a skin material that has been bent in advance to correspond to the uneven shape is pressure-bonded.