JP2707336B2 - Sheet manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a sheet formed by laminating a pad, a wadding material, and a skin.

[Prior Art] FIG. 6 is a sectional view of a sheet in which a skin 62 is adhered to a pad 61, and a trim groove 63 is formed at an appropriate position. In this sheet, the trim groove 63 is not a clear V-shaped line but a smooth U-shaped line, and there is a problem that the trim pattern is blurred. Also, when sitting, the load is transmitted directly to the pad 61,
The feeling of the seat was also bad. In order to improve the feel, a sheet having a three-layer structure of a pad, a wading material and a skin has been developed using a wading material.

[Problems to be Solved by the Invention] By the way, it is preferable that the wadding material has a thickness of 6 mm or more from the viewpoint of sitting comfort. However, when laminating the wadding material having such a thickness on the pad, it is difficult to make the pad recess into the trim groove 63, and there is a problem that the uneven surface of the pad is damaged. It is also difficult to make the wadding material adhere to the front surface of the pad.

The present invention has been made in view of the above circumstances, and provides a method of manufacturing a sheet that can easily enter a trim groove of a pad even when a thick wadding material is used, and that can closely adhere to the pad. It is another object of the present invention to provide a method for manufacturing a sheet in which trim grooves are V-shaped clear lines.

[Means for Solving the Problems] According to the present invention, a wadding material is laminated on a pad outer surface formed into a predetermined shape via a hot-melt adhesive film, and the laminated body is set on a molding die. A first step of heating and bonding the wadding material to the pad while applying pressure; laminating a skin on the outer surface of the wadding material via a hot-melt adhesive film; setting the laminated body in the molding die; And then heating while applying pressure to adhere the skin to the wadding material.

[Operation] In the first step, the wadding material is recessed into the trim groove of the pad, and the wadding material is adhered to the entire surface of the pad.
In the second step, the skin is closely adhered to the wadding material, thereby producing a three-layer sheet.

EXAMPLES Hereinafter, the present invention will be described more specifically.

The present invention includes a first step of bonding a wadding material to a pad and a second step of bonding a skin to the wadding material. FIG. 1 shows the first step, and FIG. 3 shows the second step. In these steps, a mold including a lower mold 1 and an upper mold 2 is used together. A pad 5 is set in the lower die 1, and a trim protrusion 7 is formed at a portion corresponding to the trim groove 6 of the pad 5. The lower mold 1 has a hollow shape, and has a suction nozzle 3 for reducing the pressure in the hollow portion and a steam nozzle 4 for supplying steam to the hollow portion. Then, the upper surface of the lower mold 1 is made of a porous material and has air permeability so that the suction of the suction nozzle 3 and the steam supply of the steam nozzle 4 are transmitted above the lower mold 1. On the other hand, the upper mold 2 moves up and down with respect to the lower mold 1 to press the pads set on the lower mold 1.

First, in a first step, as shown in FIG. 1 (a), a wadding material 8 is placed on the lower mold 1, and a hot-melt adhesive film 9 is laminated on the wadding material 8. In the present invention, the wadding material 8 has a thickness of 6 mm or more to improve the feel of the seat surface. Also, a heat-meltable adhesive film 9
Use a non-breathable material. Then, suction is performed from the suction nozzle 3 in this laminated state, and the wadding material 8 and the hot-melt adhesive film 9 are brought into close contact with the upper surface of the lower mold 1 (first surface).
Figure (b). As a result, the wadding material 8 and the hot-melt adhesive film 9 have shapes conforming to the upper surface shape of the lower mold 1. Thereafter, the pad 5 formed into a predetermined shape by urethane foaming or the like is placed on these laminates. The pad 5 is placed so that the trim groove 6 coincides with the trim protrusion 7 of the lower die 1. Then, the upper mold 2 is lowered onto the pad 5 to pressurize them, and heated steam is supplied from the steam nozzle 4 into the lower mold 1. By supplying this steam,
The hot-melt adhesive film 9 is melted and the wadding material 8 and the pad 5 are bonded (FIG. 3C). Accordingly, when the mold is released from the mold, the pad 5 is in a state where the wadding material 8 is recessed in the trim groove 6 of the pad 5 as shown in FIG.
The sub-assembly 10 closely adhered to is formed. FIG. 2 shows a perspective view of the sub-assembly 10, in which the trim groove 6 is clearly shown on the upper surface.

Next, in the second step, as shown in FIG.
A skin 11 is placed on the lower mold 1, and a non-breathable hot-melt adhesive film 12 is placed on the skin 11. Then, as shown in FIG.
Then, the hot-melt adhesive film 12 is brought into close contact with the upper surface of the lower mold 1. As a result, the skin 11 and the hot-melt adhesive filter 12 in a laminated state have shapes conforming to the upper surface shape of the lower mold 1. Further, the sub-assembly 10 formed in the first step is placed on these. At this time, the sub-assembly 10 is placed and positioned so that the trim groove 6 of the sub-assembly 10 and the trim protrusion 7 of the lower die 1 coincide. Then, as shown in FIG.
The upper mold 2 is lowered onto the sub-assembly 10 and pressurized. In this pressurized state, heated steam 4 is supplied from the steam nozzle 4 into the lower mold 1. Thereby, the heat-meltable adhesive film 12 is melted, and the skin 11 is bonded to the wadding material 8. When the mold is removed from the mold, a sheet 13 laminated with the wadding material 8 and the skin 11 recessed into the trim groove 6 can be obtained as shown in FIG. FIG. 4 shows a perspective view of the sheet 13, in which the trim grooves 6 are clearly shown on the upper surface. At the time of demolding in the first and second steps, suction is performed from the suction nozzle 3 to perform cooling.

According to the first and second steps as described above,
Since the wadding material 8 and the skin 11 are recessed into the trim groove 6, the trim groove 6 has a V-shape, has a clear line, and improves the appearance of the sheet. Further, since a thick wadding material can be used, the feel of the seat surface is improved.

FIG. 5 shows a sheet in which two layers of wadding materials 8, 14 are laminated, and the wading material 8 is adhered to the pad 5 in a first step. On the other hand, the wadding material 14 is laminated on the skin 11 in the second step, and is bonded by melting the hot-melt adhesive film. And this wadding material 14
The sheet is formed by bonding the wadding material 8 on the side of the pad 5 by melting of the hot-melt adhesive film interposed therebetween. In the example shown in FIG. 5, since each of the wadding members 8 and 14 can be made thin, it is easier to enter the trim groove 6.

[Effects of the Invention] As described above, the present invention includes the first step of adsorbing the wadding material on the pad and the second step of adsorbing the skin on these pads and bonding them by heating under pressure. In addition, the skin can be recessed into the trim groove to expose the trim groove, and a thick wadding material can be used, so that the feel of the seat surface is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) to 1 (d) are cross-sectional views showing a first step of the present invention, FIG. 2 is a perspective view of a sub-assembly formed by the first step, FIG. (A) to (d) are cross-sectional views showing a second step, FIG. 4 is a perspective view of a sheet formed by the second step, FIG. 5 is a cross-sectional view showing another sheet, and FIG. It is sectional drawing which shows the conventional seat. 5 Pad, 8,14 Wadding material, 9,12 Hot-melt adhesive film, 11 Skin.

Claims (1)

(57) [Claims] 1. A wadding material is laminated on an outer surface of a pad formed into a predetermined shape via a heat-fusible adhesive film, and the laminated body is set on a molding die. A first step of bonding to the pad, laminating a skin on the outer surface of the wadding material via a hot-melt adhesive film, and setting the laminated body in the forming die;
A second step of adhering the skin to the wadding material by applying pressure and then heating while applying pressure to the wadding material.