JPS6146885A - Heat-insulating wall for refrigerator, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a heat insulating wall of a refrigerator or the like.

The structure of a conventional example and its problems A conventional heat insulating wall of a refrigerator, etc. will be explained with reference to the heat insulating walls shown in FIGS. 4 to 6.

1 is an insulated door of a refrigerator, which includes a door outer wall board 2 and a foam insulation material 3
It consists of The door outer wall board 2 has a front part 2a and a side part 2.
b and the bent portion 2C form a box-like structure. Then, the side surface portion 2b of the door outer wall board 2 is drawn and formed by a press, and then the four side edges are bent inward to form the bent portion 2C.
form. Gaps are provided between the four corner joining portions 2d of the bent portions 2C so that they do not overlap, and a sealing material 4 such as hot melt, putty, or tape is sealed in this gap to prevent the foam insulation material from leaking. Ta. The pasting work of the sealing material 4 is time consuming because it is folded back from the inner surface to the outside of the corner portion, and is difficult to automate.Furthermore, it has the drawback that the foamed heat insulating material leaks because the gap cannot be completely eliminated.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the above-mentioned conventional examples, prevents leakage of heat insulating material, simplifies the manufacture of heat insulating doors, reduces costs, and improves productivity.

Structure of the Invention In order to achieve the above-mentioned object, the present invention applies a foaming adhesive to the four corner joints of the folded portion of the exterior wall board, and causes the foaming adhesive to melt due to the heat of foaming when the foaming insulation material is foamed. Since the heat insulating wall is configured to be foamed, the foamed heat insulating material does not leak out, and the manufacturing of the heat insulating wall is simplified, and the manufacturing cost is reduced and productivity is improved.

DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be explained below with reference to FIGS. 1 to 3.
The description will be made with reference to the drawings, but the same components as those in the prior art will be given the same reference numerals and detailed description thereof will be omitted.

In the figure, reference numeral 5 denotes a foamable adhesive mixed with fine powder of synthetic resin containing a gas that foams at 60 to 120'C. Then, the foaming adhesive 5 is applied to the inner side of the four corner joining parts 2d of the folded part 2C of the door outer wall board 2 in a film thickness of 50 to 200 microns. Of course, it may also be applied to the outside of the joint. This foaming adhesive 6 foams due to the foaming heat generated when the foam insulation material 3 is filled into the space between the door outer wall board 2 and the jig, thereby preventing leakage of the foam insulation material 3 and manufacturing the insulation door. The process can be simplified and shortened, resulting in lower cost and improved productivity.

Effects of the Invention The present invention has the above-mentioned configuration, in which a foaming adhesive is applied to the four corner joints of the folded portion of the outer wall board, and the foaming adhesive is applied by the foaming heat when the foaming insulation material is foamed. Since the insulation wall is structured so that the foamed insulation material foams, the foam insulation material can be prevented from leaking, and the manufacturing process of insulation doors can be simplified and shortened.It is also easy to automate, and is inexpensive and highly productive. This has the effect of making it possible to improve the situation.

[Brief explanation of drawings]

Fig. 1 is an external view of an insulated door according to an embodiment of the present invention, Fig. 2 is an enlarged view of part A in Fig. 1, Fig. 3 is a sectional view taken along line B-B in Fig. 2, and Fig. 4 is a conventional door. Figure 6 is an external view of the insulated door of Figure 4.
FIG. 6 is a sectional view taken along line DD in FIG. 6. 1...Insulated wall (insulated door), 2...Outer wall board (door outer wall board), 2C...Bent part, 2d...
... Joining part, 3 ... Foam insulation material, 6 ...
...Foaming adhesive. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4 Figure 5 Figure 3

Claims (1)

[Claims] A heat insulating wall for a refrigerator or the like, which is made of a foam adhesive applied to the four corner joints of a folded part of an exterior wall board, and a foam heat insulating material bonded to include the area where the foam adhesive is applied.