JPH0239776Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a hollow core material for interior parts.To explain in more detail, the hollow core material molded from a synthetic resin material is molded into a foam molding mold for use in headrests, armrests, etc. of vehicles, etc. The present invention relates to the structure of a hollow core material for an interior product, which is formed by inserting the foamed synthetic resin into the interior of the interior, injecting an undiluted solution of foamed synthetic resin, and molding the foam body integrally with the hollow core material.

As shown in FIG. 1, conventional interior parts for vehicles, such as head rests, are made by blow molding a synthetic resin material to form a hollow core material 2, which is inserted into a foam mold 1 with the mold opened. Although this hollow core material 2 is shown as having a headrest stay 3 fixed to it in advance, this stay 3 is not present in the case of an armrest or the like. After inserting the hollow core material 2 into the foam mold 1, the stock solution 4' of foamed synthetic resin is injected into the foam mold 1 from the injection machine 5, the foam mold 1 is closed, and the foam is cured to form a foam. Mold 4. During molding of the foam 4, as shown in FIG.
When the headrest 6 as an interior component is removed, the hollow core material 2 is restored as shown in FIG.
Due to this restoration, the foamed body 4 was deformed so that a convex portion 4a was formed on the outside thereof. For this reason, it is necessary to increase the wall thickness of the hollow core material 2 or to adopt a rib structure, which has the disadvantage that the demand for weight reduction cannot be satisfied.

The purpose of the present invention is to reduce the thickness of the hollow core material, satisfy the demand for weight reduction, prevent deformation of the hollow core material and the deformation of the foam, and simplify the shape of the hollow core material. This provides a structure of a hollow core material for an interior product that is extremely economical, and will become clear from the detailed description below with reference to the drawings.

FIG. 4 schematically shows an embodiment of the hollow core material for the interior product according to the present invention, and in this embodiment, it is shown as a case where it is applied to the hollow core material of the headrest. It is not limited to the hollow core material.

A pair of headrest stays 13 are integrally fixed to the hollow core material 12 of the headrest.
2, uneven portions 15 are formed at appropriate intervals. In addition, grooves 16 are formed on the left and right sides for integration with the foam 14 formed on the outer periphery.

A through hole 17 is formed approximately at the center of the front and back sides of the hollow core material 12, and the through hole 17 allows the foaming pressure generated when molding the foam 14 to act on the inside of the hollow core material 12. , so that it does not apply only to the outer peripheral surface. That is, as shown in FIGS. 5 and 6, when the hollow core material 12 is inserted into the foam mold 1 and the foamed synthetic resin stock solution 14' is poured, foaming progresses sequentially upward from the bottom side of the foam mold 1. However, the foaming pressure acts on the inside of the hollow core material 12 through the through holes 17 of the hollow core material 12, and the pressures on the outside and inside of the hollow core material 12 are approximately equal, so that the hollow core material 12 may be deformed by the foaming pressure. There is no such thing. When the foam 14 is molded, some of the foam 1 is inserted into the hollow core material 12 through the through hole 17.
4a penetrates into the foam mold 1, but the amount is approximately the same as that of the foam 14b coming out of the foam mold 1 through the vent hole 7 formed in the foam mold 1, and there is no risk of an increase in weight.

The above is the structure of the hollow core material of the interior product according to the present invention. According to this structure, the wall thickness of the hollow core material can be made significantly thinner, satisfying the demand for weight reduction, and being excellent in economical efficiency. At the same time, deformation of the hollow core material and deformation of the foam can be prevented, and an interior product with an excellent appearance can be obtained.

[Brief explanation of the drawing]

Figures 1 to 3 show the manufacturing process of conventional interior parts, and Figure 1 is a side cross-section showing a state in which a hollow core material is inserted into a foam mold and a stock solution of foamed synthetic resin is injected. Explanatory drawings, FIG. 2 is a side sectional explanatory view showing a state in which the foam has been molded, FIG. 3 is a side sectional explanatory view showing the interior product removed, and FIG. 4 is a hollow core material of the interior product according to the present invention. FIGS. 5 and 6 are side cross-sectional views of the present invention corresponding to FIGS. 2 and 3, respectively. In the figure, 1... foam mold, 12... hollow core material,
14'...Stock solution of foamed synthetic resin, 14...Foam,
15... uneven portion, 16... groove, 17... through hole.

Claims (1)

[Scope of utility model registration request] An interior product formed by inserting a hollow core material molded from a synthetic resin material into a foam mold, injecting a stock solution of foamed synthetic resin into the mold, and molding a foam body integrally with the hollow core material. In the structure of the hollow core material, a through hole is provided inside the hollow core material to which foaming pressure can be applied so that the hollow core material is not deformed by the foaming pressure generated when the foamed synthetic resin is foamed. The structure of the hollow core material for interior products is characterized by: