JP3340125B2 - Manufacturing method of insulation pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

TECHNICAL FIELD The present invention relates to a method for manufacturing a heat insulating box such as a refrigerator and a heat insulating pack used for a heat insulating material of the heat insulating box.

[0002]

[Prior art]

2 to 4 show a conventional heat insulating plate.
Hereinafter, the configuration of this conventional example will be described with reference to FIGS. 2 to 4. FIG.

In FIG. 1, reference numeral 1 denotes a jig body for forming a foam, which discharges a foaming undiluted solution 3 from a foaming machine discharge nozzle 2 to the bottom of the jig body 1.
The lid 5 is covered so that the foam 4 does not spill from the jig body 1 due to the foaming of the stock solution 2. The molded foam 4 has jigs 1,5
Is broken and the skin 6 is formed. The foam 4 is an open-cell foam having a cell diameter of 0.3 mm or less and having a hole penetrating a wall between adjacent cells. Since the resin layer of the skin 6 of the foam 4 does not have air permeability, the skin 6 is removed and only the foam 4 is taken out, and the foam 4 is placed in a container 7 made of a composite film having a gas barrier property. And the inside of the container 7 is decompressed to form a heat insulating plate.

Next, the operation of the above conventional example will be described. In such a heat insulator plate 8, it is necessary to remove part or all of the skin 6 surrounding the foam 4.

[0005]

[Problems to be solved by the invention]

For this reason, the foam 4 with the foamed skin 6 has to be made large in anticipation of the cutoff of the skin 6, so that the amount of material is wasted and the number of steps for cutting off increases. Was.

The present invention has been made in view of the above-mentioned conventional problems, and has been made to eliminate the drawbacks of the conventional example, and to save materials and reduce man-hours.

[0007]

[Means for Solving the Problems]

In order to achieve this object, the present invention puts a foam having a through-hole penetrating the surface skin into a container made of a plate or film having gas barrier properties, and depressurizes the inside of the container. Thereby, the gas inside the foam is exhausted through the through hole.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

The invention according to claim 1 of the present invention is a foam body which is an aggregate of open cells, because the gas inside the foam body is exhausted through the through-holes provided in the skin during the production of the heat-insulating pack having a depressurized interior. The pressure inside can be reduced.

[0009]

【Example】

Hereinafter, the heat insulator pack of the present invention will be described with reference to the drawings.

Embodiment 1 FIG. 1 shows a cross section of a heat insulating pack of the present invention. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

Reference numeral 9 denotes a through hole provided in the skin 6 of the foam 4 and penetrates the skin 6 as shown in FIG. The through-hole 9 can be easily provided by, for example, pressing a bar having a sharp tip.

Since the inner surface of the container 7 and the skin 6 of the foam 4 are arranged so as to be in contact with each other, by providing the through holes 9, the foam 4 can be kept as it is without removing the skin 6. It can be put in the container 7 and decompressed inside. This eliminates the need for removing and cutting the foam 4 and
The cutting waste generated when cutting the foam does not deteriorate the sealing performance of the sealing portion of the container. In addition, since the skin 6 can prevent the foam 4 from warping and can form the foam into a desired form, the form can be easily maintained.

[0013]

【The invention's effect】

As described above, the present invention puts a foam having a through-hole penetrating the surface skin into a container made of a plate or film having gas barrier properties, and by depressurizing the inside of the container, Since the gas inside the foam is exhausted through the through-hole, the material and man-hour can be reduced without cutting off a part of the foam, and the gas is generated when the foam is cut off. The cutting waste does not deteriorate the sealing performance of the sealing portion of the container. Further, the skin can prevent the foam from warping, and the foam can be molded into a desired form, so that the form can be easily maintained.

As another embodiment of the present invention, the same effect can be obtained even when a painted iron plate and a molded plastic material are used as a container.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heat insulator pack according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view when a conventional foam is injected.

FIG. 3 is a cross-sectional view after filling a conventional foam.

FIG. 4 is a cross-sectional view of a conventional heat insulator plate.

[Explanation of symbols]

 4 ... foam 6 ... skin 7 ... container 8 ... heat insulator pack 9 ... through-hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 39/10 F25D 23/06

Claims (1)

(57) [Claims] 1. A foam having a through-hole penetrating the surface skin is placed in a container made of a plate or film having gas barrier properties, and the inside of the container is decompressed to form the through-hole. A gas inside the foam is exhausted through a through hole.