JP3309236B2 - Plastic hollow double wall molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped plastic hollow double-walled product for various uses.

[0002]

2. Description of the Related Art Conventionally, as such a plate-shaped plastic hollow double-walled product, for example, Japanese Patent Application Laid-Open No.
There is one shown in FIG.

[0003] In the plate-shaped plastic hollow double-walled molded product shown in Fig. 1 of the above-mentioned Japanese Patent Application Laid-Open No. Hei 1-204871, the rigidity in the longitudinal direction is generally low. The reinforcing ribs are formed.

[0004]

In a plate-shaped plastic hollow double-walled product of this type, FIG.
As shown in FIG. 1, for example, a design surface b for decoration or the like may be formed on a part of one wall (front wall) a.
In such a case, the reinforcing rib c cannot be formed only on the design surface b on one wall a. In such a plate-shaped plastic hollow double-walled molded product, a so-called hip break is likely to occur at the design surface b in the longitudinal direction. For this reason, a material having sufficiently high rigidity and strength cannot be obtained, but it is a reality.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional plastic hollow double-walled molded product in a plate shape. In other words, the present invention is applicable to a case in which a rib cannot be formed on one wall or the other wall in series, such as a design surface formed on one wall or the other wall. And the other side of the wall, the standing ribs are formed alternately and continuously, so that the standing ribs can provide the same reinforcement to the design surface and other parts as the other parts, so that the overall rigidity and strength The object of the present invention is to provide a hollow double-walled molded product made of plastic having a sufficiently high plastic wall thickness.

[0006]

The present invention has the following configuration to achieve the above object. That is, the plastic hollow double-walled molded product according to the present invention is a plate-shaped plastic hollow double-walled molded product having one wall and the other wall opposed to each other, and a line is partially formed on one of the walls. The standing ribs are formed in a shape, and the standing ribs connected to the standing ribs of the one wall are linearly formed on the other wall, and the opposite end walls of the standing ribs are welded to each other to form one of the walls. The standing ribs are formed alternately and continuously over the other wall.

[0007]

In the plastic hollow double-wall molded product according to the present invention, an upright rib formed linearly on one wall;
Since the opposed end walls of the standing ribs formed on the other wall are welded, it is possible to form a design surface or the like on one wall or the other wall and form a series of ribs on a part of the wall. Even if it is not possible, the hollow double-walled molded article is formed with the standing ribs continuously and alternately over one wall and the other wall. For this reason, the hollow double-walled molded article has high rigidity and strength due to reinforcement by the continuous standing ribs.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In FIGS. 1 to 4, reference numeral 1 denotes a plastic hollow double-walled molded product, which has a plate shape. Reference numeral 2 denotes one wall (front wall), 3 denotes the other wall (back wall), and one wall 2 and the other wall 3 face each other at an interval to form a hollow double-walled structure. ing. 4 is a hollow part.

In the plate-shaped plastic hollow double-walled molded product 1, a design surface 5 for decoration is formed on one of its walls. 6, 6a are standing ribs. Standing rib 6
Is formed linearly from one end in the longitudinal direction of one wall 2 to a portion opposed to the design surface 5, and a similar standing rib 6 a is formed from the other end in the longitudinal direction of the one wall 2 to the design surface 5. 5 is formed linearly up to the portion opposed to 5. The standing ribs 6, 6 a form a concave groove 7 from one wall 2 to the other wall 3. In the illustrated example, the upstanding ribs 6 and 6a are formed in two parallel in the width direction of the hollow double-walled molded product 1, but may be one or three or more. An erect rib 8 is formed on the other wall 3 of the hollow double-walled molded product 1. The standing rib 8 is formed at a position corresponding to the design surface 5, and both end walls thereof are connected to the end walls of the standing ribs 6 and 6 a of the one wall 3, respectively. 9 and one end wall 10 of the standing rib 8, and the other end wall of the standing rib 8 and the end wall of the standing rib 6a are welded respectively.
The standing ribs 8 and 6a are formed continuously and alternately over one wall 2 and the other wall 3. Reference numeral 11 denotes a welding surface between the end wall 9 of the standing rib 6 and one end wall 10 of the standing rib 8. The standing rib 8 formed on the other wall 3 forms a concave groove 12 in the direction of the one wall 2. The standing ribs 8 of the other wall 3 are usually formed in the same number as the standing ribs 6 of the one wall 2.

The plastic hollow double-walled molded article 1 is molded by blow molding of a thermoplastic plastic which can be blow-molded such as polyethylene, polypropylene, polyamide, polycarbonate, etc., and has rigidity, hardness and dimensional accuracy of the molded article. In view of the above, an ABS resin is preferred.

FIGS. 5 and 6 show another embodiment. In this embodiment, a thick plate-like rib 6b is formed on one wall 2 with respect to the one shown in FIGS.
The joining surface 12 of the other wall 3 with the concave rib-shaped standing rib 8 is welded to form a series of continuous standing ribs. Other configurations are the same as those shown in FIGS. Although not shown, the standing rib 8 of the other wall 3 may be formed in a thick plate shape similarly to the standing rib 6b.

In the present invention, it is essential that the standing ribs 6 and 6a are linear. However, the standing ribs 8 may be linear or dotted or planar. In the above-described embodiment, the design surface 5 is shown as an example in which the ribs cannot be formed on the one wall 2 or the other wall 3 in series, but other cases in which the ribs cannot be formed on the one wall 2 or the other wall 3 in a row. as,
For example, the surface shape may be specified for the function of the product. Note that the present invention is of course useful in such a case.

In the above configuration,
An erect rib 6 formed linearly on one wall 2 and another wall 3
The opposite end walls 9 and 10 (or the joint surface 13) of the standing rib 8 formed on the other end, and the other end wall of the standing rib 8 and the standing rib 6
Since the end walls a are welded to each other, the hollow double-walled molded product 1 can be provided with an erect surface even if a design surface 5 on which ribs cannot be formed in series is formed on one wall 2 or the other wall 3. The ribs 6, 8, 6a form standing ribs which are alternately and continuously continuous over one wall 2 and the other wall 3. Therefore, the hollow double-walled molded product 1 has high rigidity and strength due to the reinforcing effect of the continuous standing ribs.

The plastic hollow double-walled molded product 1 according to the present invention is used for various applications such as various cabinets for furniture and electric devices, components such as housings, spoilers for automobiles, and loading platforms. .

[0015]

According to the present invention, even when a design surface or the like is formed on one wall or the other wall, standing ribs are formed continuously and alternately over one wall and the other wall. Thus, a portion such as a design surface can be reinforced in the same manner as the other portions, and a plastic hollow double-walled molded product having sufficiently high rigidity and strength as a whole can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a plastic hollow double-walled molded product according to the present invention.

FIG. 2 is an enlarged perspective view showing a part of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a perspective view of a part of a plastic hollow double-walled molded product according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is an overall perspective view of a plastic hollow double-walled molded product according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plastic hollow double wall molded product 2 One wall 3 The other wall 4 Hollow part 5 Design surface 6 Standing rib 6a Plate-shaped rib 7 Concave groove 8 Standing rib 9 End wall 10 End wall 11 Welding surface 12 Concave groove 13 Joining surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29D 22 / 00,24 / 00 B29C 49/00-49/80 B62D 37/02 E04C 2/30-2 / 38

Claims (1)

(57) [Claims] In a plate-shaped plastic hollow double-walled molded product having one wall and the other wall opposed to each other, an upright rib is linearly formed on a part of one wall, and the other wall is formed. An upright rib connected to the upright rib of the one wall is linearly formed on the wall, and the opposite end walls of both upright ribs are welded to be continuously continuous alternately over the one wall and the other wall. Plastic hollow double-walled molded product characterized by forming ribs.