JPH0471689B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of integrally molding a trim cover, a pad, and a frame, such as a seat bag.

Generally, there are two methods for molding products such as seat bags that integrate a trim cover, a pad, and a frame: a sewing method and an integral foaming method.

The sewing method is as shown in Figure 1A.
The pad 2, which has been foam-molded in advance, is attached to the pad, and then the cover 3, which is the outer skin, is placed on the front side, and the back side is sewn or the fasteners attached to the cover 3 are closed, resulting in a product as shown in Figure 1B. The seat bag 4 is configured as a.

Furthermore, with the integral foaming method, it is impossible to adjust the shape of the back surface of the product. Therefore, back surface treatment is necessary, and there are two types of methods: a back garnish type in which the back surface is treated with a back garnish, and a fastener type in which the back surface is treated with a fastener.

The back garnish type is shown in Fig. 2A,
As shown in FIG. 2B, a garnish 6 that covers the entire surface is attached to the back surface of the integrally foamed product 5 to form a seat bag 7 as a product shown in FIG. 2B.

On the other hand, in the fastener type, as shown in FIG. 3, a back cover 9 having a fastener 10 at the center of the back is sewn to both sides of an integrally foamed product 8 to form a seat back 12 as a product. In addition, the reference numeral 11 in FIG. 3 indicates the sewing part between the integrally foamed product and the cover.

However, in the sewing method described above, frame 1,
Since the pad 2 and the cover 3 are manufactured in separate processes and assembled in one place, there is a drawback that a dump space for each of these members and a dump space for the product is required.

Furthermore, the conventional integral foaming method has the disadvantage that the post-treatment process after integral foaming requires a lot of effort. That is, the back garnish type requires a garnish attachment process and a terminal treatment process as a pretreatment process. Furthermore, the fastener type requires a step of sewing the integrally foamed product 8 and the back cover 9.

By the way, when the trim cover, pad, and frame are integrally molded using a sewn trim cover, the foam stock solution permeates through the sewn portion of the trim cover, making it impossible to obtain a good product. Moreover,
It was very difficult to buckle the sewn parts of the trim cover.

It is an object of the present invention to at least eliminate the dump space of the pad, simplify the post-processing after integral foaming, and furthermore, although a sewn trim cover is used, it is possible to avoid impregnating the sewn portion with the foam stock solution. This provides a method of integrally molding the trim cover, pad, and frame that can be completely prevented, and will become clear from the following description with reference to the drawings.

4A, B, C and D show an embodiment of the present invention applied to the manufacture of a seat bag, and FIG. 4E shows a seat bag as a product.

As shown in FIG. 4A, a frame 13, a bag body 14 and a sewing trim cover 1 are formed in advance.
7 is used.

The frame 13 is made of hard synthetic resin, light metal, or the like.

The bag body 14 is made of a synthetic resin film such as polyethylene, and is formed by heat welding or the like into a bag shape having approximately the same external shape as the sewing trim cover 17, and is slightly larger than or approximately the same size as the product to be manufactured. It is formed. The bag 14 is provided with an opening 15 for inserting the frame 13 and an injection port 16 for the foam stock solution at the bottom.

The sewn trim cover 17 is formed by sewing leather or cloth to match the outer shape of the product to be manufactured. Therefore, the sewing trim cover 1
7 has a sewn portion 18. Further, an opening similar to that of the bag body 14 is formed at the lower end of the sewing trim cover 17.

Then, as shown in FIG. 4B, the frame 13
The bag body 14 is placed over the bag through the opening 15, and the opening 15 is sealed.

Next, as shown in FIG.
7 is placed through the opening at the lower end of the sewing trim cover, and then set in the mold 19 as shown in FIG. 4D.

Then, the foam stock solution is injected into the bag 14 through the injection port 16 provided in the bag 14 to fill it, and then air is removed from the bag 14 through the injection port 16, and the injection port 16 is tied up. Alternatively, seal it by clamping it with clamps, etc. When the foam stock solution is injected and filled, the bag body 14 acts as a backing material for the sewing trim cover 17 and completely prevents the foam stock solution from impregnating the sewing portion 18.

The bag 14 is filled with the foam stock solution, and after the air inside is removed, the foam stock solution is foamed to form a foam,
That is, the pad 20 is formed and shaped.

After the foam is cured, it is removed from the mold 19 to obtain a product 21 as a seat bag in which the sewn trim cover 17, the foam pad 20, and the frame 13 are integrated.

Although the product 21 uses the sewn trim cover 17, due to the action of the bag body 14 as a backing material, the sewn portion 18 is of good quality with no impregnation of the foam stock solution, and As shown in FIG. 4E, after being removed from the mold 19,
Post-processing is completed by simply terminal-processing the opening at the bottom end of the sewing trim cover, and there is no need for the process of attaching a back garnish or sewing the back cover as in conventional methods, and the product can be used almost as is after being released from the mold. be.

Next, several different implementations will be described.

After foaming the foam stock solution filled in the bag 14, the sewing trim cover 17 is made by passing steam through the gap between the sewing trim cover 17 and the bag 14.
It is possible to obtain a product with a good-looking surface.

Furthermore, the bag 14 is formed of a synthetic resin film that is releasable to the pad 20, and after the foam stock solution is foamed and cured, a cut is made in the bag 14 and the bag 14 is extracted to the outside. Therefore, a product 21 having breathability can be obtained. Note that if the opening 15 of the bag is used as an injection port for the foam stock solution, there is no need to provide a separate injection port 16.

Note that the present invention is applicable not only to the case of molding the illustrated seat bag, but also to the molding of integrally molded products of a sewn trim cover, pad, and frame in general.

The above is an explanation of one embodiment of the method of integrally molding a trim cover, pad, and frame according to the present invention. A bag made of synthetic resin film that is formed in a similar shape and has an opening for inserting the frame is placed over the opening of the bag, and then an opening similar to that of the bag is formed on top of the bag. A trim cover is placed over the frame and the bag body, and the sewn trim cover is placed in a mold, and a foam stock solution is injected into the bag body through the opening of the bag body, causing foaming to take the shape of the mold. Since the extended pad is foam-molded, even though a sewn trim cover is used, the sewn part is not impregnated with the foam stock solution at all, making it possible to mold a good product.

Furthermore, since the sewing trim cover is used according to the present invention, post-processing after integral foaming only needs to be done at the opening of the sewing trim cover, so post-processing can be done easily and quickly, and the back garniture can be easily and quickly removed. This has the effect of providing a product that can be used almost as is without the need for the process of attaching the trousers or sewing the back cover, and since the trim cover, pad, and frame are manufactured by integral molding, at least the dump space for the pad can be omitted. It's also effective.

It should be noted that the above description merely shows one embodiment of the present invention, and it will be obvious that various modifications and changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

Figures 1A and B show a sewing method as a conventional technique, and Figures 2A, B, and 3 show an integral foaming method as a conventional technique. Figure 3 is a diagram showing a fastener type, Figure 4 A, B, C, and D are process explanatory diagrams of an embodiment of the present invention, and Figure 4 E is a view of the product from the back side. FIG. In the figure, 13...Frame, 14...Bag made of synthetic resin film, 16...Inlet formed in the bag, 1
7...Sewn trim cover, 18...Sewn part, 20...
Padded foam, 21...product.

Claims (1)

[Claims] 1. A bag body made of synthetic resin film, which is formed into a frame that has been formed into a desired shape in advance, and which has a shape that approximates the internal shape of the sewing trim cover and has an opening for inserting the frame. A sewing trim cover having an opening similar to that of the bag is placed over the opening of the bag, and the sewing trim cover that has been placed over the frame and the bag is set in a mold, and the bag is A trim characterized in that a foam stock solution is injected into the inside of the bag through the opening of the bag and foamed to form a pad that follows the shape of the mold, and then the end of the opening of the sewing trim cover is processed. A method of integrally molding the cover, pad, and frame. 2. The bag body is formed of a synthetic resin film that has good peelability from the foam, and after the pad is foam-molded, the bag body is pulled out from the opening of the trim cover, and then the bag body is removed from the opening of the sewing trim cover. A method of integrally molding a trim cover, a pad, and a frame according to claim 1, wherein the trim cover, pad, and frame are integrally formed.