JPS6239094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a cover pad for a seat, in which the integration of the skin and pad portions and the formation of a concavo-convex pattern are performed simultaneously.

Generally, in the case of seats for two-wheeled vehicles, for example, a pad made of light-density foam is layered on top of a cushioning material such as urethane foam that forms the seat body to improve the surface feel. It is constructed by covering the entire surface with a skin such as vinyl chloride leather.

Normally, when manufacturing such a sheet, in order to streamline productivity, the pad and skin portions are integrated in advance and separately molded as a cover pad. At this time, the pad and the outer skin are overlapped and partially crimped to integrate them, and the entire cover pad is designed to improve cushioning properties, improve stability when seated, as shown in Figure 1.
A concavo-convex pattern is formed with consideration given to breathability, decorativeness, etc. The greater the undulations of this uneven pattern, the more the above-mentioned characteristics will be improved. In addition, especially in the case of two-wheeled vehicle seats, they are required to be waterproof because they are directly exposed to rainwater, and therefore, if they are sewn, rainwater, etc. can enter through the seams, so adhesives are required. In addition to the need for processing, the recesses in the concave-convex pattern are deep enough to collect rainwater at the bottom and prevent it from coming into direct contact with the occupants.
Moreover, it is formed into a continuous groove shape to function as a drainage channel for water droplets adhering to the surface.

As shown in Fig. 2, the conventional method for forming seat cover pads involves combining a mold 1 formed according to a predetermined uneven pattern with a silicone mold 2 whose surface is appropriately patterned, and then forming an upper mold. By performing primary high-frequency heating between the silicone mold 2 and the skin 3 while pressing the mold 1', a background pattern is formed on the surface of the skin 4 (embossing), and the mold 1 and the skin are 2nd between 3 and pad 4
There is a device in which the skin 3 and pad 4 are partially welded by performing high-frequency heating. However, in such a method, when trying to form a concavo-convex pattern with large undulations as described above, the pressing force of the upper mold 1' increases accordingly, causing melting in one part of the mold. There is a high risk that the skin 3 and pad 4 will break, and the first and second high-frequency heating must be performed separately, resulting in poor work efficiency.

In addition, as another method of forming a cover pad for a seat, as shown in FIG.
There is one in which hot-pressing is performed by stacking the molds one on top of the other and pressing a mold 6 provided with convex portions according to a predetermined pattern. In this case, the heat-sensitive adhesive 5 is melted and impregnated into the pad 4, and the skin 3 is partially press-fitted into the pad 4, and the bonding between the two and the formation of the uneven pattern are performed. During molding, the background pattern of the skin 3 stretches and disappears or flows, spoiling its appearance.

The present invention has been made in consideration of the above points, and
A seat cover pad that allows you to easily form any uneven pattern with sufficient undulations without causing any breakage of the skin or pad, and without the background pattern of the skin disappearing or flowing. This provides a molding method.

Further, the present invention provides a method for molding a cover pad for a seat, in which not only the cover pad is integrally molded, but also the background pattern of the outer skin can be formed at the same time.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 shows the process of forming a seat cover pad by the method of the present invention.

In the method of molding a seat cover pad according to the present invention, first, as shown in FIG.
A lining material 10, a pad 4 and an outer skin 3 are provided between
are arranged one on top of the other. Note that the silicon mold 8
is formed by solidifying silicone resin, and its surface is provided with an appropriate pattern for forming a ground pattern on the surface of the skin 3. This silicon mold 8 is
In order to emphasize the unevenness of the product, a mold surface having an uneven surface as shown in FIG. 5 may be used. Further, for the skin 3, a thermoplastic resin sheet made of vinyl chloride, nylon, vinylidene, etc., which can be formed by high-frequency heating, is used, and it may be lined with a fiber layer such as cloth. Further, the pad 4 is made of urethane foam, polyethylene foam, etc., and the backing material 10 used for maintaining strength is made of woven fabric or non-woven fabric such as Kanakin, but this is not necessarily required. Further, the pad 4 is previously impregnated with a heat-sensitive adhesive 11 according to a predetermined pattern. The adhesive 11
The adhesive may be either thermoplastic or thermosetting, and instead of impregnating the pad 4 with it, a sheet adhesive formed in a predetermined pattern may be interposed between the skin 3 and the pad 4. Alternatively, a liquid or powder adhesive may be applied or sprinkled onto the surface of the pad 4.

Next, as shown in Figure b, the epidermis 3, pad 4
Then, high frequency heating is performed while compressing the backing material 10. As a result, the skin 3 generates heat and softens, and a background pattern is formed on its surface by the silicone mold 8. At the same time, the pad 4 generates heat and the adhesive 11 partially compresses the pad 4. The skin 3 and backing material 10 are adhered. At this time, if the adhesive 11 is a thermosetting resin, it will be temporarily melted by heating and then solidified, and the adhesive portion will be fixed in a compressed state. Note that when the adhesive 11 is applied or spread on the surface of the pad 4, it is impregnated into the pad 4 by heating and melting and then solidified. Further, when the adhesive 11 is a hot-melt resin, it is necessary to stop heating after melting the adhesive and press and hold the laminate until it hardens. Further, as the adhesive 11, for example, vinyl-based adhesive,
If an adhesive whose main component is a polar resin such as nylon is used, the adhesive itself can be directly heated and melted by high frequency application, resulting in efficient adhesion.

After partially adhering and fixing the laminate consisting of the skin 3, pad 4 and backing material 10 in a compressed state as described above, the restraint by the upper mold 7 and the lower mold 9 is released; As shown in FIG. 3C, a seat cover pad is obtained which is integrated and has the background pattern of the outer skin 3 and an overall uneven pattern formed thereon. At this time, the silicon mold is externally heated if necessary.

As described above, in the method for forming a cover pad for a seat according to the present invention, since the uneven pattern is formed by the adhesive 11 without depending on the mold, the laminate is not formed during pressing as in the conventional method. To efficiently manufacture high-quality seat cover pads with sufficient undulations and a predetermined uneven pattern without any local force being applied, eliminating the risk of melting or loss of surface pattern. You will be able to do this. In addition,
In this case, it becomes possible to form an arbitrary uneven pattern with the adhesive 11, and the degree of undulation of the uneven pattern can be arbitrarily changed by appropriately adjusting the compression of the laminate. Further, during high-frequency heating for cover pad molding, the skin 3 can be formed simultaneously using the silicone mold 8, which improves work efficiency compared to conventional methods. That is, this is because silicon molds have excellent mold releasability. In addition, good heat resistance improves the durability of the mold and enables molding at higher temperatures. In addition, if the above-mentioned characteristics of the silicon mold are abstracted and the main purpose is simply to mold uneven parts or background patterns, other molds, resin molds, etc. can be used instead of the silicon mold. .

As described above, in the method of molding a seat cover pad according to the present invention, the skin is layered on a pad coated with adhesive according to a predetermined pattern, and then compressed using a flat mold. By heating and partially adhering and fixing the skin and pad in a compressed state, it is possible to easily form a high-quality seat cover pad that is integrated and has a concavo-convex pattern. If necessary, by providing a silicon mold with an appropriate pattern on the surface integrally with the mold for the skin side, the base pattern of the skin can be formed at the same time, improving workability, especially for mass production. It has the excellent advantage of being advantageous to

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a seat for a two-wheeled vehicle, Figs. 2 and 3 are front sectional views of the mold and cover pad portion, respectively showing the state of molding a seat cover pad by a conventional method, and Figs. 4 a and b. ，
FIG. 5c is a front sectional view showing one manufacturing process of a cover pad according to the method for molding a seat cover pad according to the present invention, and FIG. 5 is a front sectional view showing another shape of the silicon mold in the same embodiment. 3...Skin, 4...Pad, 7...Upper mold, 8...Silicone mold, 9...Lower mold, 10...Backing material, 11...Adhesive.

Claims (1)

[Claims] 1. The skin is layered on pads on which adhesive has been arranged in advance according to a predetermined pattern, and then these are compressed using a flat mold, and then high-frequency heating is performed to form the skin and the skin. A method for forming a seat cover pad, in which an integrated seat cover pad with a concavo-convex pattern is formed by partially adhering and fixing the cover pad in a compressed state. 2. According to the above item 1, characterized in that a silicone mold having an appropriate pattern on the surface is disposed on the side of the mold that presses the epidermis, and the background pattern of the epidermis is simultaneously formed by high-frequency heating. Method for forming seat cover pads.