JPH0327780Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an integrally molded urethane foam product such as the lid and armrest of boxes such as glove boxes and console boxes, which are automotive interior parts. This invention relates to an improvement in a urethane injection port formed in a core material.

(Prior art) Conventional urethane foam integrally molded products have a large amount of urethane injected into the gap formed between the skin 2' and the core material 4' on the wall facing the skin 2' of the core material 4'. There is one in which a through hole of a suitable size is formed and this is used as a urethane injection port 9'. (See Figure 6) (Problems to be solved by the invention) Urethane foam integrally molded products are made by injecting urethane raw material into the gap formed between the skin and the core material from the urethane injection port formed in the core material. The skin, core material, and urethane foaming tank are integrally molded by pouring and foaming and curing. However, if the urethane injection port formed in the core material is smaller than a predetermined size, the urethane raw material will not flow around to the gap formed between the skin and the core material, resulting in insufficient thickness in the urethane foam layer. occurs. This kind of problem is caused by the fact that urethane raw materials cannot be poured quickly in urethane foam integrally molded products that are particularly wide and have a narrow gap between the skin and core material.
The frequency of occurrence increases. Conventionally, as a means to solve such problems, we have developed a method that allows the urethane raw material to be poured into the gap formed between the skin and the core material in a short time.
It was considered that the urethane injection port formed in the core material could be set larger depending on the shape of the urethane foam integrally molded product. However, in the urethane foam integrally molded product formed in this way, there is nothing to hold the urethane foam layer in the part of the core material that corresponds to the urethane injection port, so the urethane foam layer in the part that corresponds to the urethane injection port has some rigidity. is not obtained. This impairs the feel of the surface of the integrally molded urethane foam product, and worse, the urethane foam layer drips from the urethane injection port formed in the core material, causing problems such as dents on the surface of the integrally molded urethane foam product.

In addition, in the above structure, by setting the urethane injection port of the core material large, the rigidity of the entire core material decreases, and due to molding shrinkage of the urethane foam layer, the core material succumbs to the shrinkage force, causing the entire urethane foam integrally molded product to deform. There are also problems.

(Means for Solving the Problems) In view of the above problems, the present invention is an integrally molded urethane foam product having a urethane foam layer injected and foamed between the skin and the core material. A urethane injection port into the gap formed between the skin and the core material is provided in the wall of the core material facing the skin, and the urethane injection port is formed by a plurality of bridges formed integrally with the core material. The above problem was solved by dividing and configuring the system into two parts.

Furthermore, by forming ribs on the periphery of the urethane injection port and the bridge, the rigidity of the core material is further increased.

(Function) With the above configuration, the urethane foam integrally molded product of the present invention divides the urethane injection port formed in the core material into a plurality of parts by the bridge formed integrally with the core material, so that the bridge can It acts as a support for the inlet area and provides a uniform elastic feel to the surface of the urethane foam integrally molded product. Moreover, this eliminates restrictions on the size of the urethane injection port, making it possible to set the urethane injection port large, thereby improving the moldability of the urethane foam layer.

Furthermore, the bridges also act as reinforcement for the core material and increase the rigidity of the entire urethane foam integrally molded product. Furthermore, the ribs formed on the periphery of the urethane injection port and the bridge of the core material enhance the reinforcing effect.

(Example) The urethane foam integrally molded product 1 shown in FIGS. It is composed of a urethane foam layer 3 that is injected and filled during formation.

The skin 2 is made of a thin synthetic resin and forms the external shape of the urethane foam integrally molded product 1.

The core material 4 is made of a plate-shaped synthetic resin, and is formed in a shape corresponding to the skin 2 with a certain distance between the core material 4 and the skin 2. Further, in the core material 4, a urethane injection port 9 consisting of a through hole is formed in a part of the wall 5 facing the skin 2. The urethane injection port 9
As shown in FIGS. 1 and 4, a plurality of bridges 10 integrally formed with the core material 4 intersect, dividing the urethane injection port 9 into a plurality of small holes 6. Further, a plurality of bosses 8 are formed on the wall 5 of the core material 4 for assembling an inner cover (not shown) to the urethane foam integrally molded product 1 with tapping screws (not shown). As shown in FIG. 3, the bottom of the boss 8 bulges toward the urethane foam layer to ensure a long threading allowance for the tapping screw.

Next, the urethane foam layer 3 is formed by injecting a urethane raw material through the small hole 6 of the urethane injection port 9 while forming the skin 2 and the core material 4, filling the foam, and hardening. There is. The urethane foam layer 3 is adhered to the skin 2 and the core material 4, so that the skin 2, the urethane foam layer 3, and the core material 4 are integrated.
Further, the shape of the urethane foam layer 3 is maintained by the core material 4, and in particular, the shape of the portion corresponding to the urethane injection port 9 is maintained by a bridge 10 formed integrally with the core material 4.

In addition, if it is necessary to increase the rigidity of the core material 4 over time, ribs may be added to the peripheral edge 11 of the urethane injection port 9 and the bridge 12 formed in the core material 4, as shown in FIGS. 4 and 5. 7 and the injection port 9 may be configured in a honeycomb shape. By the rib 7, the core material 4
The urethane injection port 9 formed in the urethane foam injection port 9 is reinforced, and the rigidity of the core material 4 is increased, which in turn increases the rigidity of the entire urethane foam integrally molded product.

In this embodiment, the core material 4 of the urethane foam integrally molded product 1 is made of resin, but the core material 4 may be a pressed product of an iron plate.

(Effects) According to the present invention, the moldability of the urethane foam layer can be improved without impairing the feel of the surface of the urethane foam integrally molded product. Moreover, the rigidity of the urethane foam integrally molded product can be increased, and deformation of the urethane foam integrally molded product due to molding shrinkage of the urethane foam layer can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional perspective view showing a first embodiment of the present invention;
Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
FIG. 4 is a cross-sectional perspective view showing the second embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the - line in FIG. 4, and FIG. 6 is a cross-sectional perspective view showing the conventional embodiment. be. 1... Urethane foam integrally molded product, 2... Skin,
3... Urethane foam layer, 4... Core material, 5... Wall,
7...Rib, 9...Urethane injection port, 10, 12
...Britsji.

Claims (1)

[Claims for Utility Model Registration] (1) A urethane foam integrally molded product having a urethane foam layer injected and foamed between the skin and the core, which is formed between the skin and the core. A urethane injection port into the gap formed between the skin and the core material was provided on the opposing wall, and the urethane injection port was divided into a plurality of parts by a bridge formed integrally with the core material. An integrally molded urethane foam product. (2) The integrally molded urethane foam product according to item 1, characterized in that ribs are formed on the periphery of the urethane injection port and on the bridge.