JPH03153345A - Adhesion of sheet skin cover - Google Patents

Abstract

PURPOSE:To save an adhesive by placing an adhesive film only on a recessed shape part of the upper face of a mold pad and adhering a seat skin cover on the recessed shape part necessary for adhesion. CONSTITUTION:A hot-melt adhesive film 5 is placed on a molding face 3A of a bottom force 3 and is fastened by pinning it with pins 4. Then, a urethane resin for foaming is fed in the molding part S of the bottom force 3 and a top force is closed to perform foaming and molding in the whole space of the molding part S. A foamed molding is taken out of the mold 1 and the pins are taken off to obtain a mold pad 6 adhered with the adhesive film 5. A skin sheet 8 is cut and sewed to form a sheet skin cover 7 covering the upper and side faces of the mold pad 6. Then, the sheet skin cover wherein the rear face is made inside covers the mold pad 6 adhered with the adhesive film 5. Thereafter, the skin 7A on the upper face side of the mold pad 6 is adhered along the recessed shape part 6A of the mold pad 6 by heat-melting the adhesive film 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for adhering a seat skin cover (also called a seat skin cover), and more specifically to a method for adhering a seat skin cover (also called a seat skin lining). This relates to the method of covering and adhering a seat skin cover (also called a seat pad).

[Prior Art] Generally, the upper surface of a seat cushion for a vehicle seat is formed in a concave shape in order to improve the retention of a seated occupant. This seat cushion is made by a process of covering a molded pad with a concave top surface with a seat skin cover that covers the side and top surfaces of the molded pad and bonding it.
I will be built.

That is, as shown in FIG. 8, first, the skin sheet 8
A hot-melt adhesive film 21 is laminated on the entire back surface using a hot roll 22, 22, and the laminated skin sheet 8 is cut into parts 8A that cover the mold pad 24, as shown in FIG. , these are sewn to form the skin cover 23 shown in FIG. 10.

On the other hand, a polyurethane molded pad 24 having a concave upper surface is prepared, and a seat skin cover 23 with the adhesive film 21 facing the back side as shown in FIG.
is placed over the upper surface of the mold pad 24. and,
As shown in FIG. 12, the mold pad 24 covered with the seat skin cover 23 is pressed with the upper mold 11 for pressing so that the skin 23A of the concave portion 24A is pressed by the lower mold 12 for pressing. It is arranged between the upper molds 12 for tightening. Next, heated steam G is ejected from the lower press mold 12 to heat the adhesive film 21 on the Ali surface of the skin 2a, thereby bonding the skin 23 portion on the upper surface side of the mold pad 24 to the concave portion 24A of the mold pad 24.

In this way, a vehicle seat 25 is obtained in which the upper surface side of the seat skin cover 23 is adhered to the concave portion 24A of the mold pad 24.

[Problems to be Solved by the Invention] However, the above-described conventional method of attaching the seat skin cover 23 requires: (1) a step of laminating the skin sheet 8 and the adhesive film 21 in advance; and (2) adhesion. agent film 2
Since the lamination in step 1 is done on the entire surface of one side of the skin sheet 8, the adhesive film 8 is attached to unnecessary parts (smoked wood) when cutting the laminated skin sheet, resulting in waste of adhesive (film). (c) When adhering the mold pad 24 and the seat skin cover 23, as shown in FIG. 13, the skin part 27 of the side part 26 is not bonded, and the adhesive (film) at this part is wasted. There was a problem.

Therefore, an object of the present invention is to solve the above-mentioned problems in the conventional seat skin cover bonding process. To provide a method for bonding a seat skin cover that can bond the skin, does not use adhesive in parts where the skin is not bonded, and does not waste adhesive.

[Means for Solving Problem W] The means of the present invention for achieving the above-mentioned problem is the concave shape of the color molding molding part for forming a molded pad for a seat cushion whose upper surface has a concave shape. A hot-melt adhesive film is pinned to the molding surface part for forming, and then foam molding is performed using urethane foam in this mold, and the pins are removed along with demolding, and the adhesive film is attached to the concave shape part. After molding the bonded mold pad, a seat skin cover covering the top and side surfaces of the mold pad is applied, and then heated steam is applied to the seat skin cover to remove the adhesive film of the mold pad. This is a method of bonding seat skin covers in which the seat skin cover is heated and bonded to the mold pad in the area where the adhesive film is placed.

The adhesive film used is a film of a hot-melt adhesive such as polyethylene, ethylene/vinyl acetate copolymer resin, ethylene/ethyl acrylate copolymer resin, or the like.

[Function] In foam molding of a mold pad, the adhesive film is adhered to the concave portion of the upper surface of the mold pad. The molded pad is covered with a seat skin cover. The upper surface side of the mold pad of the seat skin cover is heated with heated steam. This heating melts the adhesive film,
A skin is adhered to the concave surface of the upper surface of the mold pad.

[Example] Next, an example of the present invention will be described based on FIGS. 1 to 7.

FIG. 1 shows a mold 1 for foam-molding a t-rudobud 6. As shown in FIG. The mold 1 consists of an upper mold 2 and an F mold 3, and these molds form a molding portion S for forming a mold pad 6 of a predetermined shape. The molding surface 3A on the bottom surface of the molding part S of the mold 3 is a part that becomes the concave-shaped part 6A on the upper surface of the mold pad 6, and an appropriate number of molding surfaces 3A are formed on this molding surface 3A for pinning the adhesive film 5, which will be described later. Pins 4 to 4 are formed to protrude.

A hot-melt adhesive film (thermoplastic adhesive film) 5, modified polyethylene film in this example, is arranged on the molding surface 3A of the lower mold 3, and is inserted into each pin 4 to 4. Stop it. The adhesive film 5 to be pinned has a predetermined size necessary for adhering the mold pad 6 and the seat skin cover 7, that is, the size necessary for adhering the concave portion 6A on the upper surface of the mold pad 6. It will be done.

Thereafter, a urethane resin for foaming is injected into the molding part S of the mold 3, the upper mold 2 is closed, and the cup inside the molding part S is foam-molded (see FIG. 2). During foam molding, the adhesive film 5 pinned to the molding surface 3A is a polyurethane foam molded product (
Adhere to mold pad 6). Then, the foam molded body is demolded and depinned from the mold 1 to obtain a mold pad 6 to which the adhesive film 5 is adhered (see FIG. 3).

On the other hand, the skin sheet 8 is prepared. The skin sheet 8 is made of a single-layer sheet or a multi-layer sheet obtained by polymerizing and bonding a plurality of sheets in advance, and in this example, a multi-layer sheet in which a moquette fabric is adhered to a polyurethane layer is used. The skin sheet 8 is cut and sewn to form a seat skin cover (seat surface bar assembly) 7 that covers the top and side surfaces of the mold pad 6 (see FIG. 4). Note that this seat skin cover 7 is made only of the skin sheet 8 and does not have an adhesive on the back surface.

Next, as shown in FIG. 5, the mold pad 6 to which the adhesive film 5 has been adhered is covered with a sheet skin cover 7 with the back side facing inside, and the upper surface of the mold pad 6 and each of the front, rear, left and right sides are covered. is covered with a seat skin cover 7, and a frame 9 is placed in the groove for attaching the rear surface of the t-rudo bad 6.

The molded pad 6 covered by the seat skin cover 7 is the sixth
As shown in the figure, the upper mold 11 for pressing is arranged and fixed on the actual surface side of the mold pad 6, the lower mold 12 for pressing is arranged on the upper surface side of the mold pad 6, and the lower mold 12 for pressing is fixed. It is pressed against the mold pad 6 side, and the upper skin 7A of the mold pad 6 is held in a state in contact with the adhesive film 5 surface of the mold pad 6. The lower press mold 12 has a hollow chamber 13 to which heated steam is supplied, and the press surface 14 is formed in a convex shape that matches the concave portion 6A on the upper surface of the mold pad 6. A large number of jetting holes 14A to 14A are provided.

Thereafter, heated steam G is supplied to the lower mold 12 for pressing, and the heated steam G is injected from the injection holes 14A to 14A of the press surface 14 to heat and melt the adhesive film 5 through the skin 7A, thereby forming the mold pad. The upper skin 7A of the mold pad 6 is adhered along the concave portion 6A of the mold pad 6. Then, after holding the pressure to a certain extent, the upper mold 11 for pressing and the lower mold 12 for pressing are removed from the mold, and the back side of the end of the seat skin cover 7 is processed, and then the product of the vehicle seat 15 is It is said that This vehicle seat 15 had a top skin 7A adhered along the concave portion 6A of the nine-fold pad 6, and had a good finish.

The mold 3 of the mold 1 in the embodiment described above has pins 4 to 4 protruding from a predetermined molding surface 3A.
Although the adhesive film 5 is fixed by 4 to 4, the pins 4 to 4 on the molding surface 3A of the lower mold 3 are not necessarily limited to those formed in a protruding manner. It may be of a type (not shown) in which the pin is removed when the molded body is removed from the mold.

[Effects of the Invention] In the present invention, since the adhesive film is arranged only on the concave portion of the upper surface of the ale pad, the seat skin cover covering the seat pad can be bonded in the concave portion necessary for adhesion. can. In other words, in the present invention, the adhesive film is placed only on the parts of the seat skin cover where it is desired to be bonded, and no adhesive (adhesive film) is provided on the back side of the seat skin cover. There is no need to laminate adhesive to the skin sheet for the cover, there is no waste of adhesive in unnecessary parts when cutting the skin sheet laminated with the adhesive (film), and there is no need to glue the sheet skin cover. There is no waste of adhesive in any part.

[Brief explanation of the drawing]

Figures 1 to 6 relate to embodiments of the present invention, with Figure 1 being a cross-sectional view of a mold for molding a seat pad, Figure 2 being a process diagram for molding a seat pad, and Figure 3 being a diagram of a molded seat pad. Fig. 4 is a sectional view of the seat skin cover, Fig. 5 is a process diagram of covering the seat cover with the seat pad, Fig. 6 is a process diagram of heating the upper surface of the seat cover, and Fig. 7 is a diagram of the process of heating the seat cover on the seat pad. FIG. Figures 8 to 13 show conventional examples for the seat cover adhesion process, Figure 8 is a process diagram of laminating an adhesive to a skin sheet, Figure 9 is a process diagram of cutting a skin sheet, and Figure 1 is a process diagram of cutting the skin sheet.
FIG. 0 is a back view of the seat cover, FIG. 11 is a diagram showing one step of putting the seat cover over the seat pad, FIG. 12 is a heating process diagram, and FIG. 13 is a VI explanatory diagram of adhesive distribution in a vehicle seat. 1...Molding mold 3A...Molding surface 4...Bin 5...Adhesive film 6...Mold pad 6A...Concave shaped portion 7...Seat skin cover 11...・Upper clamping die 12...Downstream clamping die 15...Vehicle seat G...Heating steam S...Forming part

Claims (1)

[Claims] A hot-melt adhesive film is pinned to the molding surface portion for forming the concave shape of the molding part of the molding mold for forming a mold pad for a seat cushion having a concave upper surface, and then this molding is performed. Foam molding is performed using urethane foam in a mold, and the mold is removed and depinned to form a mold pad with an adhesive film adhered to the concave portion.The mold pad is then covered with a sheet skin covering the top and side surfaces of the mold pad. A cover is applied, and then heated steam is applied to the seat skin cover to heat the adhesive film of the mold pad, thereby bonding the seat skin cover to the mold pad at the portion where the adhesive film is placed. How to attach the seat skin cover.