JPH0353858Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a skin material for a foamed molded product, which is used to mold a foamed product inside by injecting a liquid foaming raw material.

(Prior art) For example, in the manufacture of foam molded products such as automobile headrests or armrests, in which a foam is covered with a skin material, it is possible to prevent wrinkles from forming on the skin material, and the work is easy. The so-called integral foam molding method is often used because it is easy to perform.

The integral foam molding method uses a bag-shaped skin material with an opening for raw material injection, injects liquid foaming material into the skin material from the opening, causes it to foam within the skin material, and integrates it with the skin material. This is a method for manufacturing foam molded products.

By the way, as an example of the skin material of the foam molded product that has been conventionally used, for example, the skin material of a headrest has an opening 10 consisting of a hole at the bottom as shown in FIG. 4, or a skin material as shown in FIG. There is one that is provided with an opening 12 that can be closed by overlapping. 14 in the figure is a stay for attaching the headrest to the seat, and the skin material 11,
It is integrated with a reinforcing body (not shown) embedded in a foam body (not shown) in 13.

(Problems to be Solved by the Invention) However, in the case of the skin material 11 with holes 10, the raw material not only leaks out from the holes 10 during integral foam molding and contaminates the area around the holes, but also 1
Since the foam is exposed from the bottom, there is a problem in that the aesthetic appearance of the headrest is impaired. Furthermore, in the case of the skin material 13 in which the opening 12 can be closed by overlapping after raw materials are injected, there is a problem in that the aesthetic appearance is impaired because the overlapping creates a step in the area. Furthermore, due to the foaming reaction, the overlapping must be done in as short a time as possible, and the edges may be folded during overlapping due to workers rushing the work.
The aesthetic appearance may be further impaired or the overlapping may become insufficient. Moreover, if the overlapping is insufficient, the problem arises that the raw material leaks from the area and the area around the overlapping area gets dirty.

This invention is intended to solve the problems of the prior art, namely, the problem of poor aesthetic appearance during foam molding, and the problem caused by the overlapping operation of the openings.

(Means for solving the problem) This invention is a bag-shaped skin material having an opening for injecting liquid foaming raw material, and a rod-like material which is biased so as to press the opening on both sides to close the opening. Alternatively, plate-shaped springs are provided at both ends of the opening, and the opening is opened by bending the springs to the outside of both sides of the opening.

(Function) In the skin material according to this invention, the opening is always closed by the bias of the springs on both sides of the opening. In integral foam molding using such a skin material, the longitudinal ends of the opening are pushed from both sides, and the springs on both sides that press the opening are pushed outwards in a ``dog'' or ``dog'' shape. By bending it into the shape of a letter, an opening is opened, and the liquid foaming material is injected into the interior through the opening.Then, the force applied to both ends of the opening is released to release the spring, and the restoring force of the spring is used to release the force applied to both ends of the opening. The opening is then closed again, and the raw material is foamed in this state.

Therefore, the raw material in the skin material does not leak out from the opening during foaming and stain the area around the opening, and furthermore, the foam inside is not exposed after integral foam molding. Moreover, if the spring is provided so as not to protrude outward from the surface of the skin material, the outer surface of the opening becomes substantially flat. As a result, the appearance of the integrally foamed molded product becomes extremely good.

In addition, the opening can be opened simply by pushing both longitudinal ends of the opening from both outsides, and when closing, it is only necessary to release the force applied to both ends of the opening. Opening and closing can be done instantaneously, easily, and reliably.

(Example) This invention will be explained below based on examples.

Fig. 1 is a partially cutaway perspective view of the headrest skin material 20 according to this invention, Fig. 2 is a perspective view of the spring, and Fig. 3 is an exploded perspective view of the opening in a closed state. .

The skin material 20 is made of various sheet-like materials such as fabric, plastic leather, a laminate thereof, or a laminate of fabric and soft foam, etc., into a predetermined bag-like shape, and a stay insertion hole 22 is provided at the bottom. , 22, and an opening 24 for injecting liquid foaming material. The opening 24 is used not only for injecting the liquid foaming material but also for inserting an insert in which the stay 14 and the reinforcing body (not shown) are integrated. The openings on both sides 26, 26 are
As shown in FIG. 3, the ends are folded back inward and sewn together into a bag shape, and a spring 28 is passed through the bag shape on both sides 26, 26. The spring 28 consists of two plate-shaped springs 28a and 28b which are always urged to press against each other and are connected by hinges at both ends 29a and 29b. By pushing it as shown, it bends and opens outwards on both sides in the shape of a "dog" or an anti-dog shape, as shown by arrows C and D, respectively. Therefore, the opening 24 of the skin material is always kept closed with both sides 26 , 26 pressed together by the spring 28 . Note that the spring 28 may have the same structure as described above with two rod-shaped springs.

Next, integral molding of the headrest using this skin material 20 will be explained.

First, an insert is inserted into the skin material 20 from the opening 24. To insert the springs 28a, 28b on both sides of the opening, press the springs 28a, 28b on both sides of the opening from both outsides, i.e., arrows C, D. This is done by bending it in a ``dog'' shape or a reverse ``dog'' shape, and opening the opening 24. Next, the skin material is placed in a headrest mold, the opening 24 is opened in the same manner as when inserting the insert, and a liquid foaming material such as a polyurethane foam material is injected into the skin material through the opening. Immediately after injection, the force applied to both longitudinal ends of the opening is released to release the spring 28, and the restoring force of the spring closes the opening. Then, the mold is closed to perform foaming, and after the foaming is completed, the integrally foamed molded product is taken out to obtain the desired headrest.

(Effects of the invention) The skin material according to this invention always closes the opening for injecting the liquid foaming material with springs provided on both sides of the opening, and bends the spring only when injecting the liquid foaming material. The opening can be opened by pressing the button. Therefore, there is no risk of raw materials leaking out of the opening and staining the area around the opening during integral foam molding.
Moreover, since the internal foam is not exposed after integral foam molding and there is no step difference due to overlapping, the external appearance of the integral foam molded product is extremely good.

In addition, the opening can be opened simply by pushing both longitudinal ends of the opening from both outsides, and when closing, it is only necessary to release the force applied to both ends of the opening. Opening and closing can be done instantaneously, easily, and reliably, and there are no operational problems associated with conventional stacking.

[Brief explanation of the drawing]

Figures 1 to 3 relate to one embodiment of this invention, in which Figure 1 is a perspective view of the skin material, Figure 2 is a perspective view of the spring, and Figure 3 shows the state in which the opening is closed. It is a partial perspective view of an opening, and FIGS. 4 and 5 are perspective views of conventional skin materials. 24...opening, 26...both sides of the opening, 28...
…Spring.

Claims (1)

[Scope of utility model registration request] In a bag-shaped skin material having an opening for injecting liquid foaming raw material, rod-shaped or plate-shaped springs are provided at both ends of the opening, which are biased so as to press both sides of the opening to each other and close the opening, A skin material for a foamed molded product, characterized in that the opening can be opened by bending a spring to the outside of both sides of the opening.